Abstract

A composite material includes a plurality of polypropylene sheet layer unit groups that are sequentially stacked; each polypropylene sheet layer unit group comprises at least one of the same or different polypropylene sheet layer units, the structure of each polypropylene sheet layer unit is BiAiB′i; the structure of the polypropylene composite material is . . . i-th group, . . . second group, first group, second group, . . . i-th group, . . . ; the melting point of polypropylene composition Ai is greater than the melting point of polypropylene compositions Bi and B′i; and the average value of the melting points of all outer layers in the i-th group is greater than the average value of the melting points of all outer layers in an (i-1)th group. The polypropylene composite material has a very good tensile property and very good impact resistance, and also has good interlayer stripping strength at a relatively low hot-pressing temperature.

IPC Classes  ?

• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins
• B32B 7/02 - Physical, chemical or physicochemical properties
• B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• B32B 37/10 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using direct action of vacuum or fluid pressure
• B32B 38/00 - Ancillary operations in connection with laminating processes

Abstract

An olefin polymerization catalyst component, a catalyst system, a prepolymerization catalyst composition and an olefin polymerization method are provided. The catalyst component contains magnesium, titanium, halogen, and an internal electron donor. The internal electron donor includes a compound A, a compound B and a compound C. The compound A is selected from a hydroxybenzoyl compound represented by formula (I), the compound B is selected from one or more of an ester compound other than the compound A and an ether compound, and the compound C is selected from an alkoxysilane represented by formula RnSi(OR6)4-n. A content of the compound A may be zero. The catalyst system contains the catalyst component and a co-catalyst component or a reaction product of the two, or a prepolymerization catalyst composition prepared by further prepolymerization is used for olefin copolymerization.

IPC Classes  ?

• C08F 10/06 - Propene

Abstract

A polypropylene microsphere and a preparation method therefor, a 3D printing raw material, and a use are provided. The polypropylene microsphere contains 0.2 wt %-10 wt % of a structural unit derived from ethylene and 90 wt %-99.8 wt % of a structural unit derived from propylene. A melting heat absorption curve of the polypropylene microsphere is obtained by means of a differential scanning calorimeter (DSC), and a half-peak width (Wm) of the melting heat absorption curve of the polypropylene microsphere is 4-10° C. The crystallization sequence distribution of the polypropylene microsphere is uniform, and when the polypropylene microsphere is used for 3D printing, 3D printing melting is uniform.

IPC Classes  ?

• C09D 123/14 - Copolymers of propene
• B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
• B29K 23/00 - Use of polyalkenes as moulding material
• B29K 105/00 - Condition, form or state of moulded material
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• C08F 210/16 - Copolymers of ethene with alpha-alkenes, e.g. EP rubbers

Abstract

The invention relates to a field of polymer preparation and discloses a method for promoting phase-separation of polymer solution. The phase-separation method of polymer solution of the invention comprises: at least a portion of the polymer solution is subjected to a heat treatment under flowing so that the polymer solution is divided into a clear liquid phase and a concentrated liquid phase, wherein the Reynolds number of the polymer solution flowing is 0.2-30. By performing the heat treatment under specific Reynolds number conditions, the invention permits to reduce the temperature of phase-separation of solution, reduce the time of phase-separation of solution, and significantly reduce the material consumption and energy consumption of the entire process, compared with the existing technology that only performs phase-separation through heat treatment.

IPC Classes  ?

• C08F 6/04 - Fractionation
• B01D 17/04 - Breaking emulsions
• C08F 6/12 - Separation of polymers from solutions

Abstract

The present invention relates to a process for producing succinic anhydride by maleic anhydride hydrogenation, comprising (1) feeding a maleic anhydride solution and a hydrogen raw material respectively to a first-stage hydrogenation reactor from an upper liquid-phase feed port and a top gas-phase feed port of the first-stage hydrogenation reactor for a first-stage hydrogenation reaction to obtain a first-stage hydrogenation product; (2) feeding the first-stage hydrogenation product to a second-stage hydrogenation reactor for a second-stage hydrogenation reaction to obtain a second-stage hydrogenation product, optionally, before entering the second-stage hydrogenation reactor, subjecting the first-stage hydrogenation product to a first-stage gas-liquid separation to obtain a first-stage gas phase and a first-stage liquid phase, and then feeding the first-stage gas phase and the first-stage liquid phase respectively from a top gas-phase feed port and an upper liquid-phase feed port of the second-stage hydrogenation reactor; and (3) subjecting the second-stage hydrogenation product to a second-stage gas-liquid separation to obtain a second-stage gas phase and a second-stage liquid phase, returning a part of the second-stage liquid phase to step (1) to be mixed with the maleic anhydride solution for the first-stage hydrogenation reaction, and optionally, using part or all of the second-stage gas phase as a circulating hydrogen. The present invention also relates to a process for producing succinic acid comprising such process, a liquid-phase hydrogenation reaction system, and a system for producing succinic acid comprising such system.

IPC Classes  ?

• C07D 307/60 - Two oxygen atoms, e.g. succinic anhydride
• B01J 8/04 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
• C07C 51/087 - Preparation of carboxylic acids or their salts, halides, or anhydrides from carboxylic acid anhydrides by hydrolysis

Abstract

The invention belongs to the field of insulating materials, in particular cable insulating materials, and particularly relates to a modified flexible polypropylene insulating material, and preparation method and use thereof. The modified flexible polypropylene insulating material comprises a propylene-based continuous phase, and a rubber phase and a grafted phase derived from an unsaturated bond-containing polymerizable monomer dispersed in the propylene-based continuous phase; wherein, the modified flexible polypropylene insulating material has a content of xylene solubles of 10-55 wt %, preferably 15-45 wt %, more preferably 18-40 wt %, and still more preferably 20-40 wt %, based on the total weight of the modified flexible polypropylene insulating material; the content of structural units derived from the unsaturated bond-containing polymerizable monomer and in a grafted state in the modified flexible polypropylene insulating material is 0.3-6 wt %, and preferably 0.7-5 wt %; the flexural modulus of the modified flexible polypropylene insulating material is 200-1000 MPa, preferably 200-950 MPa, more preferably 200-700 MPa, and still more preferably 250-600 MPa; preferably, the ratio of the mass of the structural units derived from the unsaturated bond-containing polymerizable monomer in xylene insolubles to the mass of the structural units derived from the unsaturated bond-containing polymerizable monomer in the modified flexible polypropylene insulating material is more than 0.1, preferably 0.3-0.9. The modified flexible polypropylene insulating material of the invention can give consideration to both mechanical property and electrical property at a higher working temperature, and is suitable for working conditions of high temperature and high operating field strength.

IPC Classes  ?

• C08L 23/12 - Polypropene
• H01B 3/44 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes vinyl resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes acrylic resins

Abstract

A polyimide random copolymer has a structure represented by formula (I). A method for preparing the polyimide random copolymer, a membrane made of the polyimide random copolymer, and a method for preparing a polyimide-based hollow fiber membrane are also provided. A system for purifying helium gas and a method for purifying helium gas are related to the membrane made of the polyimide random copolymer. A polyimide random copolymer has a structure represented by formula (I). A method for preparing the polyimide random copolymer, a membrane made of the polyimide random copolymer, and a method for preparing a polyimide-based hollow fiber membrane are also provided. A system for purifying helium gas and a method for purifying helium gas are related to the membrane made of the polyimide random copolymer.

IPC Classes  ?

• C08G 73/10 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors
• B01D 69/08 - Hollow fibre membranes
• B01D 69/10 - Supported membranesMembrane supports
• B01D 71/02 - Inorganic material
• B01D 71/64 - PolyimidesPolyamide-imidesPolyester-imidesPolyamide acids or similar polyimide precursors

Abstract

20, R being H or a methyl; and metal cations are introduced to part of structure units A in the ionomer. The ionomer shows an outstanding effect on nucleation of PET, serves as a nucleating agent for PET modification, so as to obtain a corresponding PET composition. A system and method for continuously preparing maleic acid ester ionomer microspheres and cross-linked maleic acid ionomer microspheres, so as to achieve continuous preparation, washing and separation of ionomer microspheres, effectively stabilizes the separation effect, and avoids frequent start and stop operations of a centrifuge.

IPC Classes  ?

• C08L 67/02 - Polyesters derived from dicarboxylic acids and dihydroxy compounds
• C08F 212/08 - Styrene
• C08F 212/36 - Divinylbenzene
• C08F 222/06 - Maleic anhydride
• C08L 35/06 - Copolymers with vinyl aromatic monomers

Abstract

A lanthanum oxycarbonate catalyst, and a preparation method therefor and an application thereof are provided. The lanthanum oxycarbonate catalyst contains a rod-shaped lanthanum oxycarbonate catalyst and a nearly parallelogram lanthanum oxycarbonate catalyst. The lanthanum oxycarbonate catalyst can be used for efficiently performing a methane oxidative coupling reaction at a relatively low temperature.

IPC Classes  ?

• B01J 27/232 - Carbonates
• B01J 35/30 - Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
• B01J 35/50 - Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
• B01J 37/04 - Mixing
• B01J 37/10 - Heat treatment in the presence of water, e.g. steam
• B01J 37/34 - Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves
• C07C 2/84 - Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling catalytic

Abstract

A method for preparing polymer includes the steps of enabling olefin and unsaturated carboxylate be subjected to a polymerization reaction in the presence of a catalyst to generate an olefin-unsaturated carboxylate polymer. The catalyst has a primary catalyst and optionally a cocatalyst. The primary catalyst has at least one complex represented by formula I, formula I′, or formula I″. By selecting a reacted unsaturated carboxylate monomer, catalysts, and a suitable polymerization process, a spherical and/or sphere-like polymer having good shape is directly prepared without subsequent processing steps such as granulation, and the obtained polymer product is not prone to fouling in a reactor and is convenient for transportation. A method for preparing polymer includes the steps of enabling olefin and unsaturated carboxylate be subjected to a polymerization reaction in the presence of a catalyst to generate an olefin-unsaturated carboxylate polymer. The catalyst has a primary catalyst and optionally a cocatalyst. The primary catalyst has at least one complex represented by formula I, formula I′, or formula I″. By selecting a reacted unsaturated carboxylate monomer, catalysts, and a suitable polymerization process, a spherical and/or sphere-like polymer having good shape is directly prepared without subsequent processing steps such as granulation, and the obtained polymer product is not prone to fouling in a reactor and is convenient for transportation.

IPC Classes  ?

• C08F 210/02 - Ethene

Abstract

The invention belongs to the field of olefin polymerization and relates to a propylene-based copolymer, its preparation process and use, and a polypropylene composition thereof. The propylene-based copolymer can contain 60-95 wt % of propylene-derived structural units and 5-40 wt % of comonomer-derived structural units; the propylene-based copolymer has a comonomer dispersion degree D[PCP]/[C] in the range of 50%-70%, wherein the comonomer dispersion degree D[PCP]/[C]=[PCP]/[C]×100%. Upon blending the propylene-based copolymer of the present invention with a polypropylene, the copolymer has excellent compatibility with polypropylene, and can promote the crystallization of the polypropylene and can improve the mechanical properties of the resulting polypropylene material.

IPC Classes  ?

• C08F 210/06 - Propene
• C08L 23/14 - Copolymers of propene

Abstract

A branched olefin polymer, a preparation method therefor and the use thereof are provided. The branched olefin polymer is obtained by polymerizing at least one C4-C20 nonterminal olefin monomer with optional ethylene, propylene, and C4-C20 terminal olefin monomers; and the branched olefin polymer has the following characteristics: (a) a molecular weight of 20000 to 500000 g/mol; (b) a molecular weight distribution of 3.5 to 6.0, and a bimodal structure characterized by GPC; (c) a melting point of 0° C. to 110° C. and a glass-transition temperature of −80° C. to −50° C.; and (d) having 20 to 200 methyl groups per 1000 methylene groups.

IPC Classes  ?

• C08F 10/14 - Monomers containing five or more carbon atoms
• C07F 15/04 - Nickel compounds
• C09J 123/20 - Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms

Abstract

A polymer ultrafiltration membrane with a bicontinuous highly interconnected porous structure, a preparation method and applications thereof are provided. The ultrafiltration membrane has a bottom layer and a polymer layer. The polymer layer is divided into a sublayer and a surface layer. The surface layer is of a uniform small pore structure with a narrow pore size distribution. The sublayer is of a bicontinuous highly interconnected three-dimensional network porous structure. The bicontinuous highly interconnected porous structure of the bicontinuous highly interconnected porous ultrafiltration membrane is characterized as follows: in the thickness direction of the sublayer, the cross-sectional porosity on any XY cross-section perpendicular to the thickness direction is 40-90%, preferably 60-90%, and further preferably 70-90%; and the difference in the cross-sectional porosities between any two XY cross-sections does not exceed 10%, preferably not exceed 8%, and also preferably not exceed 5%.

IPC Classes  ?

• B01D 69/12 - Composite membranesUltra-thin membranes
• B01D 61/00 - Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltrationApparatus, accessories or auxiliary operations specially adapted therefor
• B01D 61/02 - Reverse osmosisHyperfiltration
• B01D 61/14 - UltrafiltrationMicrofiltration
• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• B01D 69/02 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or propertiesManufacturing processes specially adapted therefor characterised by their properties
• B01D 71/56 - Polyamides, e.g. polyester-amides
• C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis

Abstract

The present invention belongs to the field of petrochemical industry, and discloses a method for selective hydrogenation of butadiene extraction tail gas and a selective hydrogenation apparatus thereof. The method for selective hydrogenation of butadiene extraction tail gas comprises: (1) an alkyne-containing tail gas from a butadiene extraction unit is fed into a raw material tank, optionally impurities entrained in the alkyne-containing tail gas are removed before being fed into the raw material tank; (2) a C4 raw material in the raw material tank is pressurized by a feed pump to a pressure required for reaction, then merged with a circulated C4 stream from a first-stage reactor outlet buffer tank and fed into a first-stage mixer, wherein it is mixed with hydrogen gas, and fed into the first-stage reactor to undergo a first-stage hydrogenation reaction, and a first-stage reaction stream obtained by the reaction is fed into the first-stage reactor outlet buffer tank; the hydrogen gas required for the reaction in the first-stage reactor is fed through a first feeding mode or a second feeding mode: the first feeding mode comprises: all the hydrogen gas required for the reaction is fed through the first-stage reactor outlet buffer tank, and then fed into the first-stage reactor through a first route at an outlet of the first-stage reactor outlet buffer tank; the second feeding mode comprises: a part of the hydrogen gas required for the reaction is fed through the first-stage reactor outlet buffer tank, and then fed into the first-stage reactor through the first route at an outlet of the first-stage reactor outlet buffer tank; and the other part of the hydrogen gas is fed through the first-stage mixer, and then fed into the first-stage reactor; (3) there is no gas-phase discharge from the first-stage reactor outlet buffer tank, and a liquid-phase product is divided into at least two streams, the first stream is returned to the first-stage reactor as the circulated C4 stream, and the second stream is used as a feed to a stabilization tower or subjected to further hydrotreatment prior to being fed into the stabilization tower; (4) a C4 hydrogenation product is recovered after separation in the stabilization tower.

IPC Classes  ?

• C10G 45/32 - Selective hydrogenation of the diolefin or acetylene compounds
• C10G 5/06 - Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas by cooling or compressing

Abstract

A propylene polymer-based composite film, a preparation method therefor, and an application thereof are provided. The composite film contains at least two different layers: layer a and layer b layer. Layer a and layer b each contains at least one propylene polymer, and at least one of layer a and layer b contains a propylene impact copolymer. The propylene impact copolymer contains elastic moieties that form dispersed strip-like rubber phases in the composite film. The rubber phases are arranged parallel to each other. The average dimension of transverse axes of the rubber phases is 20-200 nm and the average of aspect ratios is 5-20. The composite film is can be used in the field of packaging materials, especially in battery packaging materials, electronic product packaging materials, or food packaging materials.

IPC Classes  ?

• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins
• B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
• B32B 27/20 - Layered products essentially comprising synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents

Abstract

A liquid butadiene-styrene polymer, a preparation method for same and an application of same, as well as a composition, a polymer coating, an adhesive and a cross-linking agent containing the same are provided. When the total weight of the liquid butadiene-styrene polymer is taken as a reference, in the liquid butadiene-styrene polymer, the content of a styrene structural unit is 15-30 wt %, the content of a butadiene structural unit is 70-85 wt %, and the content of a 1,2-structural unit is 60-80 wt %; when the total weight of the 1,2-structural unit in the liquid butadiene-styrene polymer is taken as a reference, the content of a cyclized 1,2-structural unit is 20-60 wt %. A coating formed by the liquid butadiene-styrene polymer not only has high peel strength for a substrate, but also has improved thermal expansion performance.

IPC Classes  ?

• C08F 236/10 - Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl aromatic monomers
• C09D 147/00 - Coating compositions based on homolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bondsCoating compositions based on derivatives of such polymers
• C09J 147/00 - Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bondsAdhesives based on derivatives of such polymers
• C08K 5/13 - PhenolsPhenolates
• C08K 5/527 - Cyclic esters
• C08K 5/134 - Phenols containing ester groups

Abstract

A metal-organic framework material separation membrane and a preparation method for the metal-organic framework material separation membrane are provided. The metal-organic framework material separation membrane has a base membrane and a metal-organic framework material functional layer. The metal-organic framework material functional layer comprises has an inter-embedded polyhedron structure. The preparation metal-organic framework material separation membrane includes the steps of: (1) preparing a solution containing a first organic solvent, an organic ligand, a metal compound, and an auxiliary agent; (2) subjecting a base membrane to a pretreatment, involving introducing, on the surface of the base membrane, metal atoms from the metal compound of step (1); and (3) mixing the pretreated base membrane of step (2) with the solution of step (1) to obtain a first mixture, and then heating the first mixture for reaction, so as to prepare a metal-organic framework material separation membrane.

IPC Classes  ?

• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• B01D 69/02 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or propertiesManufacturing processes specially adapted therefor characterised by their properties
• B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
• B01D 71/26 - Polyalkenes
• B01D 69/08 - Hollow fibre membranes
• C07F 7/00 - Compounds containing elements of Groups 4 or 14 of the Periodic Table

Abstract

A thermoplastic composite material has an inner layer material and at least one layer of outer layer material. The inner layer material is a core layer that contains fiber bundles, a first thermoplastic resin and a first auxiliary agent; and the at least one layer of outer layer material wraps the core layer and is a resin layer comprising a second thermoplastic resin and an optional second auxiliary agent. The fiber bundles extend continuously from one end of the core layer to the opposite end thereof. The inner layer-outer layer composite structure, can effectively improves the processing performance of the thermoplastic composite material and the lubricity between fibers and resin matrixes during injection molding, and improves the fluidity of the fibers in a resin matrix melt.

IPC Classes  ?

• B29C 70/46 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
• B29C 70/16 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length

Abstract

A solid component for preparing an olefin polymerization catalyst, and a preparation method therefor and an application thereof are provided. The solid component contains: (i) a magnesium compound as represented by the following formula (1), (ii) a Lewis base (LB), and optionally, (iii) metal components other than magnesium. The LB is a compound as shown in general formula (II) or an amide compound as shown in general formula (II′). The solid component has a better particle morphology, and a catalyst prepared by using the solid component as a carrier is less likely to be crushed, and has better stereostructural orientation in olefin polymerization, particularly in propylene polymerization or copolymerization. A solid component for preparing an olefin polymerization catalyst, and a preparation method therefor and an application thereof are provided. The solid component contains: (i) a magnesium compound as represented by the following formula (1), (ii) a Lewis base (LB), and optionally, (iii) metal components other than magnesium. The LB is a compound as shown in general formula (II) or an amide compound as shown in general formula (II′). The solid component has a better particle morphology, and a catalyst prepared by using the solid component as a carrier is less likely to be crushed, and has better stereostructural orientation in olefin polymerization, particularly in propylene polymerization or copolymerization.

IPC Classes  ?

• C08F 110/06 - Propene

Abstract

A spherical carrier for olefin polymerization catalysts has at least one magnesium-containing compound having a structure represented by formula (1). The spherical carrier has a relatively good particle morphology, and substantially no abnormally morphological particles will appear. A method for preparing the spherical carrier can be used to prepare a carrier having a small particle size and greatly expands the particle size range of the preparable carrier. When the catalyst prepared by using the carrier is used for olefin polymerization, polymerization activity is good, substantially no abnormally morphological material is present, and hydrogen response is good. A spherical carrier for olefin polymerization catalysts has at least one magnesium-containing compound having a structure represented by formula (1). The spherical carrier has a relatively good particle morphology, and substantially no abnormally morphological particles will appear. A method for preparing the spherical carrier can be used to prepare a carrier having a small particle size and greatly expands the particle size range of the preparable carrier. When the catalyst prepared by using the carrier is used for olefin polymerization, polymerization activity is good, substantially no abnormally morphological material is present, and hydrogen response is good.

IPC Classes  ?

• C08F 4/02 - Carriers therefor
• C08F 4/00 - Polymerisation catalysts

Abstract

A copolymer contains, based on the total amount of structural units of the copolymer, 90-99 mol % of propylene structural units and 1-10 mol % of butene structural units. The xylene solubles content of the copolymer is less than or equal to 4 wt %, and preferably less than or equal to 3 wt %. The propylene-butene copolymer is substantially free of fraction having a molecular weight lower than 1000. The copolymer has a melt flow index of greater than or equal to 20 g/10 min as measured at 230° C. under a load of 2.16 kg. The propylene-butene copolymer has a high melt flow index and few xylene solubles, and does not contain a phthalate-type plasticizer, and can be used in fields such as food and medical and health services.

IPC Classes  ?

• C08F 210/06 - Propene
• C08F 210/08 - Butenes
• C08F 4/646 - Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group
• C08F 4/654 - Pretreating with metals or metal-containing compounds with magnesium or compounds thereof
• C08F 4/643 - Component covered by group with a metal or compound covered by group other than an organo-aluminium compound
• C08F 4/649 - Catalysts containing a specific non-metal or metal-free compound organic

Abstract

A magnesium-based solid, by means of determination based on a nitrogen adsorption method, has a multimodal pore distribution and a specific surface area of not less than 50 m2/g, and the pore size distribution of the solid is in a range of 1 nm to 300 nm. There is at least one peak within a pore size range of less than 10 nm, and there is at least another peak within a pore size range of not less than 10 nm. A catalyst is formed using the solid catalyst component is used for propylene polymerization.

IPC Classes  ?

• C08F 110/06 - Propene
• C08F 4/02 - Carriers therefor
• C08F 4/16 - Metallic compounds other than hydrides and other than metallo-organic compoundsBoron halide or aluminium halide complexes with organic compounds containing oxygen of silicon, germanium, tin, lead, titanium, zirconium or hafnium

Abstract

Disclosed is a catalyst useful for producing organic amines by catalytic amination, its preparation and application thereof, wherein the catalyst comprises an inorganic porous carrier containing aluminum and/or silicon and an active metal component supported on the carrier, the active metal component comprises at least one metal selected from the group consisting of Group VIII and Group IB metals, and the carrier has an ammonia adsorption capacity of 0.25 to 0.65 mmol/g, as measured by NH3-TPD test. The catalyst has an improved performance, when used for producing organic amines by catalytic amination.

IPC Classes  ?

• B01J 29/46 - Iron group metals or copper
• B01J 35/10 - Solids characterised by their surface properties or porosity
• B01J 21/06 - Silicon, titanium, zirconium or hafniumOxides or hydroxides thereof
• B01J 37/08 - Heat treatment
• B01J 37/02 - Impregnation, coating or precipitation
• B01J 23/75 - Cobalt
• B01J 23/755 - Nickel
• B01J 23/889 - Manganese, technetium or rhenium
• B01J 23/882 - Molybdenum and cobalt
• B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
• B01J 21/04 - Alumina
• B01J 21/08 - Silica
• B01J 21/12 - Silica and alumina
• B01J 29/48 - Crystalline aluminosilicate zeolitesIsomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11 containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
• B01J 23/80 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with zinc, cadmium or mercury
• B01J 27/18 - PhosphorusCompounds thereof containing oxygen with metals
• B01J 21/02 - Boron or aluminiumOxides or hydroxides thereof
• B01J 27/053 - Sulfates
• B01J 27/186 - PhosphorusCompounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
• B01J 23/02 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the alkali- or alkaline earth metals or beryllium
• B01J 27/055 - Sulfates with alkali metals, copper, gold or silver
• B01J 27/08 - Halides
• B01J 27/138 - HalogensCompounds thereof with alkaline earth metals, magnesium, beryllium, zinc, cadmium or mercury
• C07C 209/16 - Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups by substitution of hydroxy groups or of etherified or esterified hydroxy groups with formation of amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings

Abstract

Disclosed are a catalyst useful for producing organic amines by catalytic amination its preparation and application thereof, which catalyst comprising an inorganic porous carrier containing aluminum and/or silicon, and an active metal component supported on the carrier, the active metal component comprising at least one metal selected from Group VIII and Group IB metals, wherein the carrier has an L acid content of 85% or more relative to the total of the L acid and B acid contents. The catalyst shows an improved catalytic performance when used for producing organic amines by catalytic amination.

IPC Classes  ?

• B01J 29/46 - Iron group metals or copper
• B01J 37/08 - Heat treatment
• B01J 37/18 - Reducing with gases containing free hydrogen
• B01J 37/02 - Impregnation, coating or precipitation
• B01J 21/04 - Alumina
• B01J 21/12 - Silica and alumina
• B01J 23/75 - Cobalt
• B01J 23/755 - Nickel
• B01J 23/883 - Molybdenum and nickel
• B01J 23/889 - Manganese, technetium or rhenium
• B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
• B01J 23/83 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with rare earths or actinides
• B01J 23/80 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with zinc, cadmium or mercury
• B01J 23/843 - Arsenic, antimony or bismuth
• B01J 27/08 - Halides
• B01J 27/16 - PhosphorusCompounds thereof containing oxygen
• B01J 27/053 - Sulfates
• B01J 27/057 - Selenium or telluriumCompounds thereof
• B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
• B01J 35/10 - Solids characterised by their surface properties or porosity
• C07C 209/16 - Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups by substitution of hydroxy groups or of etherified or esterified hydroxy groups with formation of amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings
• C07C 209/22 - Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups by substitution of other functional groups
• C07C 209/02 - Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of hydrogen atoms by amino groups

Abstract

A polypropylene composition, a preparation method therefor, and an article made therefrom, the polypropylene composition comprising: (a) 70-95% by weight of a crystalline homo-polypropylene having a isotactic pentad fraction of 96% or more and forming a continuous matrix phase in the polypropylene composition; (b) 5-30% by weight of an ethylene-propylene elastic copolymer containing 20-35% by weight of an ethylene structure unit and 65-80% by weight of a propylene structure unit, and forming a dispersed rubber phase in the continuous matrix phase, such that the rubber phase can at least partially deform under an orientation force and form an orientation state structure, wherein the ratio of melt mass flow rate measured at 230° C. and a 2.16 kg load of the crystalline homo-polypropylene and the polypropylene composition is 0.5-2.0. The polypropylene composition and article have a high gloss and good mechanical properties, and the preparation method is simple, low in cost and environmentally friendly; and the article can be used in electric appliances, homes, packaging, automobiles, toys, or the medical field.

IPC Classes  ?

• C08L 23/12 - Polypropene

Abstract

A preparation method for a copolymer includes the step(s) of contacting an olefin and an unsaturated carboxylic acid shown in Formula II or a derivative of the unsaturated carboxylic acid shown in Formula II with a catalyst and optionally a chain transfer agent for reaction in the presence of an alkane solvent to obtain the copolymer. The copolymer is a spherical and/or spherical-like copolymer.

IPC Classes  ?

• C08F 220/04 - AcidsMetals salts or ammonium salts thereof
• C08F 210/02 - Ethene
• C08J 9/16 - Making expandable particles

Abstract

Disclosed are a spherelike supermacroporous mesoporous material, a polyolefin catalyst, and a preparation method therefor and an olefin polymerization process. The spherelike supermacroporous mesoporous material has a twodimensional hexagonal ordered pore channel structures. The mesoporous material has an average pore size of 10 nm to 15 nm, a specific surface area of 300 m2/g to 400 m2/g, and an average particle size of 1 µm to 3 µm, based on the total mass of the mesoporous material. The mass content of water in the mesoporous material is < 1 ppm. The mass content of oxygen in the mesoporous material is < 1 ppm. When a polyolefin catalyst prepared with the mesoporous material as a carrier is used for an olefin polymerization reaction, the a polyolefin product with a narrow molecular weight distribution and a good melt index can be obtained.

IPC Classes  ?

• C08F 4/02 - Carriers therefor
• C08F 4/605 - Component covered by group with a metal or compound covered by group , not provided for in a single group of groups or

Abstract

The present disclosure relates to olefin polymerization catalysts, and discloses a catalyst component for olefin polymerization or copolymerization and a preparation method therefor, and a catalyst and an application thereof. The catalyst component for olefin polymerization or copolymerization in the present disclosure comprises titanium element, magnesium element, an electron donor, an organic silicon polymer, and an inorganic oxide support, wherein the molecular composition of the organic silicon polymer is [RxSiO(4-x)/2]m, wherein R is selected from alkyl, aryl, vinyl or oxygen, x is 0 or more and 2 or less, and the value of m makes the number-average molecular weight of the organic silicon polymer be 1×103-1×106 g/mol. The catalyst has the characteristics of high activity, good hydrogen-regulating copolymerization performance, high bulk density of resulting polymer powder, and a low content of fine powder in the polymer powder when applied to olefin polymerization, particularly to ethylene and α-olefin polymerization.

IPC Classes  ?

• C08F 10/02 - Ethene
• C08F 4/642 - Component covered by group with an organo-aluminium compound
• C08F 4/02 - Carriers therefor
• C08F 4/649 - Catalysts containing a specific non-metal or metal-free compound organic

Abstract

Liquid polybutadiene, and a preparation method therefor and an application thereof are provided. The liquid polybutadiene has a number-average molecular weight of 2,500-5,500 and a molecular weight distribution index of 1-1.2. Based on the total amount of the liquid polybutadiene, the content of a 1,2-structural unit in the liquid polybutadiene is 85-95 wt %, the content of a 1,4-structural unit in the liquid polybutadiene is 5-15 wt %, and the molar ratio of a cis-1,4-structural unit to a trans-1,4-structural unit in the liquid polybutadiene is 1-2:1; and the dynamic viscosity of the liquid polybutadiene at 45° C. is 100-500 P. The liquid polybutadiene has good flowability, good film formability, and good coating performance, and a formed coating has an improved adhesion force to a substrate.

IPC Classes  ?

• C08L 9/02 - Copolymers with acrylonitrile
• C08F 136/06 - Butadiene
• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08K 5/06 - EthersAcetalsKetalsOrtho-esters
• C08K 5/56 - Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
• C09D 109/00 - Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons

Abstract

The invention belongs to the field of polymers, and relates to an anhydride group-containing polypropylene graft for an insulating material and preparation method thereof. The anhydride group-containing polypropylene graft comprises structural units derived from a polypropylene copolymer, structural units derived from an anhydride monomer and structural units derived from an alkenyl-containing polymerizable monomer; the content of the structural units derived from the anhydride monomer and the alkenyl-containing polymerizable monomer and in a grafted state in the anhydride group-containing polypropylene graft is 0.1 to 5 wt %, based on the weight of the anhydride group-containing polypropylene graft; and, the molar ratio of the structural units derived from the anhydride monomer to the structural units derived from the alkenyl-containing polymerizable monomer in the anhydride group-containing polypropylene graft is 1:1-20; the polypropylene copolymer has at least one of the following characteristics: the comonomer content is 0.5 to 40 mol %; the content of xylene solubles is 2 to 80 wt %; the comonomer content in the xylene solubles is 10 to 70 wt %; the intrinsic viscosity ratio of the xylene solubles to the polypropylene copolymer is 0.3 to 5. The anhydride group-containing polypropylene graft of the invention can give consideration to both mechanical property and electrical property at a higher working temperature.

IPC Classes  ?

• C08F 255/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms on to ethene-propene copolymers
• C08F 212/08 - Styrene
• C08F 222/06 - Maleic anhydride
• C08K 5/14 - Peroxides
• H01B 3/44 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes vinyl resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes acrylic resins

Abstract

The invention belongs to the field of polymers, and relates to a grafting-modified polypropylene material for an insulating material and preparation method thereof. The grafting-modified polypropylene material comprises structural units derived from a polypropylene copolymer and structural units derived from an alkenyl-containing polymerizable monomer; the content of the structural units derived from the alkenyl-containing polymerizable monomer and in a grafted state in the grafting-modified polypropylene material is 0.1 to 14 wt %; the polypropylene copolymer has at least one of the following characteristics: the comonomer content is 0.5 to 40 mol %; the content of xylene solubles is 2 to 80 wt %; the comonomer content in the xylene solubles is 10 to 70 wt %; the intrinsic viscosity ratio of the xylene solubles to the polypropylene copolymer is 0.3 to 5. The grafting-modified polypropylene material of the invention can give consideration to both mechanical property and electrical property at a higher working temperature.

IPC Classes  ?

• C08F 255/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms on to ethene-propene copolymers
• C08F 212/08 - Styrene
• C08K 5/14 - Peroxides
• H01B 3/44 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes vinyl resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes acrylic resins

Abstract

iiiiiii; and the average value of the melting points of all outer layers in the i-th group is greater than the average value of the melting points of all outer layers in an (i-1)th group. The polypropylene composite material having a melting point gradient structure of the present invention has both a very good tensile property and very good impact resistance, and also has very good interlayer stripping strength at a relatively low hot-pressing temperature.

IPC Classes  ?

• B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins

Abstract

The present invention relates to the field of polymer preparation. Disclosed is a method for promoting phase separation of a polymer solution. The method for promoting the phase separation of the polymer solution of the present invention comprises: performing heat treatment on at least part of a polymer solution under flow to separate the polymer solution into a clear liquid phase and a concentrated liquid phase, wherein the Reynolds number of the flow of the polymer solution is between 0.2-30. According to the present invention, compared with performing phase separation only by means of heat treatment in the prior art, heat treatment is performed at a certain Reynolds number, such that the phase separation temperature of the solution is decreased, the phase separation duration of the solution is shortened, and the material consumption and energy consumption of the whole process are significantly reduced.

IPC Classes  ?

• C08F 6/04 - Fractionation
• C08F 6/06 - Treatment of polymer solutions
• B01D 17/00 - Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion

Abstract

The present invention relates to the technical field of polypropylene materials, and provides a polypropylene microsphere and a preparation method therefor, a 3D printing raw material, and a use. The polypropylene microsphere comprises 0.2-10 wt% of a structural unit derived from ethylene and 90-99.8 wt% of a structural unit derived from propylene, wherein the melting heat absorption curve of the polypropylene microsphere is obtained by means of a differential scanning calorimeter (DSC), and the half-peak width (Wm) of the melting heat absorption curve of the polypropylene microsphere is 4-10°C. According to the polypropylene microsphere of the present invention, the crystallization sequence distribution of the polypropylene microsphere is uniform, and when the polypropylene microsphere is used for 3D printing, 3D printing melting is uniform, a product is good in performance, and the polypropylene microsphere has an industrial application prospect.

IPC Classes  ?

• C08F 210/06 - Propene
• C08F 210/00 - Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• C08L 23/00 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bondCompositions of derivatives of such polymers
• C08F 4/642 - Component covered by group with an organo-aluminium compound

Abstract

A polyethylene composition and the use thereof, and a polyolefin microporous breathable film prepared therefrom. The polyethylene composition comprises a polyethylene matrix resin and a pore-forming agent, wherein the content of the pore-forming agent is 30-110 parts by weight on the basis of 100 parts by weight of the polyethylene matrix resin, the pore-foaming agent comprises maleic anhydride copolymer microspheres, a copolymer in the microsphere comprises a structural unit A from maleic anhydride, a structural unit B from a vinyl-containing comonomer M and an optional cross-linking structure unit from a cross-linking agent, and the average particle size of the maleic anhydride copolymer microspheres is 500-2000 nm. The polyethylene composition can be used for preparing a breathable film without using a coupling agent, a dispersing agent and/or a surfactant, and achieves uniform air permeability and a high water vapor transmission rate. The film can be used for breathable composite products such as sanitary products, medical products, and food packaging or building products.

IPC Classes  ?

• C08L 23/08 - Copolymers of ethene
• C08L 35/00 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereofCompositions of derivatives of such polymers
• C08J 9/00 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof
• C08K 5/103 - EstersEther-esters of monocarboxylic acids with polyalcohols
• C08K 5/134 - Phenols containing ester groups
• C08K 5/526 - Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds

Abstract

The present invention relates to a method for producing succinic anhydride by means of maleic anhydride hydrogenation, comprising (1) a maleic anhydride solution and a hydrogen raw material respectively enter a first-stage hydrogenation reactor from an upper liquid-phase feed port and a top gas-phase feed port of the first-stage hydrogenation reactor for a first-stage hydrogenation reaction to obtain a first-stage hydrogenation product; (2) the first-stage hydrogenation product enters a second-stage hydrogenation reactor for a second-stage hydrogenation reaction to obtain a second-stage hydrogenation product, optionally, before entering the second-stage hydrogenation reactor, the first-stage hydrogenation product is subjected to first-stage gas-liquid separation to obtain a first-stage gas phase and a first-stage liquid phase, and then the first-stage gas phase and the first-stage liquid phase are respectively fed from a top gas-phase feed port and an upper liquid-phase feed port of the second-stage hydrogenation reactor; and (3) the second-stage hydrogenation product is subjected to second-stage gas-liquid separation to obtain a second-stage gas phase and a second-stage liquid phase, a part of the second-stage liquid phase is returned to step (1) to be mixed with the maleic anhydride solution for the first-stage hydrogenation reaction, and optionally, part or all of the second-stage gas phase is used as circulating hydrogen. The present invention also relates to a succinic acid production method comprising the method, a liquid-phase hydrogenation reaction system, and a succinic acid production system comprising the system.

IPC Classes  ?

• C07C 51/087 - Preparation of carboxylic acids or their salts, halides, or anhydrides from carboxylic acid anhydrides by hydrolysis
• C07C 55/10 - Succinic acid
• C07D 307/60 - Two oxygen atoms, e.g. succinic anhydride
• B01J 8/04 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds

Abstract

n64-n4-n, wherein the content of the compound A may be zero. When the catalyst system comprising the catalyst component and a co-catalyst component or a reaction product of the two or a prepolymerized catalyst composition prepared by further prepolymerization is used for olefin copolymerization, excellent olefin copolymerization ability is displayed and good excellent polymerization activity, orientation ability and hydrogen adjustment sensitivity are maintained; in addition, polymer particles that are obtained have a good shape, high sphericity and less fine powder.

IPC Classes  ?

• C08F 4/646 - Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group
• C08F 4/649 - Catalysts containing a specific non-metal or metal-free compound organic
• C08F 10/00 - Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• C08F 110/06 - Propene
• C08F 4/02 - Carriers therefor

Abstract

A cracking reaction device, a method for preparing olefins by means of cracking, and an application. The cracking reaction device comprises a preheating segment, a weight lightening segment, a vacuum gasification segment and a cracking segment which are connected in sequence. The method for preparing olefins by means of cracking comprises pressurizing a cracking raw material and water; and performing first heating on the pressurized cracking raw material and water; performing second heating on the cracking raw material and water subjected to the first heating, and lightening the weight of the cracking raw material in the presence of water to obtain a lightweight mixture; performing vacuum gasification on the lightweight mixture, and performing third heating to obtain a mixture subjected to the third heating; and cracking, at a cracking temperature in the presence of steam, the mixture subjected to the third heating, so as to obtain a cracked product comprising olefins. The cracking reaction device and/or the cracking method can effectively improve the crude oil cracking efficiency and improve the olefin yield, so that the running cost is reduced, the coking and blockage of the cracking device can be reduced, and the running time of the cracking reaction device is prolonged.

IPC Classes  ?

• C10G 9/18 - Apparatus
• C10G 9/20 - Tube furnaces
• C10G 9/36 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by direct contact with inert preheated fluids, e.g. with molten metals or salts with heated gases or vapours

Abstract

Disclosed in the present invention are a catalyst for gas-phase oxidation of 1,2,4,5-tetraalkylbenzene to prepare benzene-1,2,4,5-tetracarboxylic dianhydride, a preparation method for and an application of the catalyst, and a preparation method for benzene-1,2,4,5-tetracarboxylic dianhydride. The catalyst according to the present invention comprises a carrier and a catalytically active component coating attached to the carrier; the catalytically active component coating comprises a first coating and a second coating; the first coating is close to the surface of the carrier, and the second coating is distant from the surface of the carrier; in the first coating, the mass ratio of titanium element denoted by Ti to vanadium element denoted by V is Ti/V1; in the second coating, the mass ratio of titanium element denoted by Ti to vanadium element denoted by V is Ti/V2, wherein Ti/V2=Ti/V1+ΔTi/V, and ΔTi/V is within a range of 3 to 9. The catalyst according to the present invention exhibits improved catalytic activity, and can effectively increase the yield of benzene-1,2,4,5-tetracarboxylic dianhydride.

IPC Classes  ?

• B01J 23/22 - Vanadium

Abstract

The present invention relates to the field of olefin polymerization, and in particular relates to a catalyst composition and an application thereof. The catalyst composition of the present invention comprises the following components: a) a metallocene compound, b) a co-catalyst component, and c) a phenol, the co-catalyst component being a combination of an organoaluminum compound and an alkyl aluminoxane, or a combination of an organoaluminum compound and an organoboron compound. When the catalyst composition of the present invention is used for the copolymerization of ethylene and a cycloolefin or an alkenol, not only can the molecular weight of the polymer be increased, but the content of cycloolefin or alkenol structural unit in the copolymer can also be increased.

IPC Classes  ?

• C08F 4/659 - Component covered by group containing a transition metal-carbon bond
• C08F 4/68 - Vanadium, niobium, tantalum, or compounds thereof
• C08F 4/642 - Component covered by group with an organo-aluminium compound
• C08F 4/60 - MetalsMetal hydridesMetallo-organic compoundsUse thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths, or actinides together with refractory metals, iron group metals, platinum group metals, manganese, technetium, rhenium, or compounds thereof
• C08F 10/02 - Ethene

Abstract

The present invention relates to the field of ethylene copolymers. Disclosed are an ethylene-copolymerized olefin copolymer having a high comonomer dispersion index, a preparation method therefor, an application thereof, and a composition comprising an ethylene-α-olefin copolymer. The ethylene-α-olefin copolymer contains 70-95 mol% a structural unit derived from ethylene and 5-30 mol% a structural unit derived from α-olefin. The α-olefin is an olefin having 5-10 carbon atoms, and a dispersion index RMD of the α-olefin structural unit in the molecular chain is greater than 102%. The ethylene-α-olefin copolymer of the present invention has a high comonomer dispersion index.

IPC Classes  ?

• C08F 210/16 - Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
• C08F 4/6592 - Component covered by group containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
• C08F 4/649 - Catalysts containing a specific non-metal or metal-free compound organic
• C08F 4/642 - Component covered by group with an organo-aluminium compound

Abstract

A flexible polypropylene modified insulation material, a preparation method therefor, and an application thereof, in particular, relating to the field of cable insulation materials. The flexible polypropylene modified insulation material comprises a propylene-based continuous phase, as well as a rubber phase dispersed in the propylene-based continuous phase and a graft phase derived from a polymerizable monomer containing an unsaturated bond. On the basis of the total weight of the flexible polypropylene modified insulation material, the content of a xylene soluble matter in the flexible polypropylene modified insulation material is 10-55 wt%, preferably 15-45 wt%, more preferably 18-40 wt%, and more preferably 20-40 wt%; and the content of a structural unit in a grafted state derived from the polymerizable monomer containing the unsaturated bond in the flexible polypropylene modified insulation material is 0.3-6 wt%, preferably 0.7-5 wt%. The flexible polypropylene modified insulation material has a flexural modulus of 200-1000 MPa, preferably 200-950 MPa, more preferably 200-700 MPa, and more preferably 250-600 MPa. Preferably, the ratio of the mass of the structural unit, in a xylene insoluble matter, derived from the polymerizable monomer containing the unsaturated bond in the flexible polypropylene modified insulation material to the mass of the structural unit in the flexible polypropylene modified insulation material is greater than 0.1, preferably 0.3-0.9. The flexible polypropylene modified insulation material can give consideration to both mechanical performance and electrical performance at a higher working temperature, and is suitable for working conditions having high temperature and high operating field strength.

IPC Classes  ?

• C08L 23/12 - Polypropene
• C08F 255/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms
• C08F 255/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms on to ethene-propene copolymers
• C08F 222/06 - Maleic anhydride
• H01B 3/30 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes

Abstract

An amino-imine metal complex represented by Formula I, its preparation method and an application thereof are provided. The complex is used as a main catalyst in catalysts for olefin polymerization, and can catalyze the polymerization of ethylene at a relatively high temperature to prepare branched polyethylene having high molecular weight.

IPC Classes  ?

• C07F 15/04 - Nickel compounds
• C08F 4/70 - Iron group metals, platinum group metals, or compounds thereof
• C08F 10/02 - Ethene

Abstract

The present application relates to a polyimide random copolymer having a structure as represented by formula (I). The present application also relates to a method for preparing the polyimide random copolymer, a film prepared from the polyimide random copolymer, and a method for preparing a polyimide-based hollow fiber membrane. The present application further relates to a system for purifying helium and a method for purifying helium.

IPC Classes  ?

• C08G 73/10 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors
• B01D 71/64 - PolyimidesPolyamide-imidesPolyester-imidesPolyamide acids or similar polyimide precursors
• B01D 69/08 - Hollow fibre membranes
• B01D 63/02 - Hollow fibre modules

Abstract

A method for cracking crude oil includes delivering the crude oil to a first tube group of a convection section of a cracking furnace for preheating and then performing vaporization to obtain a first gas phase and a first liquid phase; performing high-pressure extraction on the first liquid phase to obtain a non-asphalt oil and an asphalt; and mixing the first gas phase and the non-asphalt oil with water vapor respectively, or mixing the first gas phase with the non-asphalt oil prior to mixing with water vapor, then delivering the same to a second tube group of the convection section of the cracking furnace for heating, followed by delivering same to a radiation section of the cracking furnace for cracking to obtain a cracked product, and separating the cracked product to obtain low-carbon olefins.

IPC Classes  ?

• C10G 55/04 - Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process plural serial stages only including at least one thermal cracking step
• C10G 9/20 - Tube furnaces
• B01D 21/26 - Separation of sediment aided by centrifugal force
• B01D 11/04 - Solvent extraction of solutions which are liquid

Abstract

A method for preparing an olefin-olefinic alcohol copolymer and an olefin-olefinic alcohol copolymer prepared by the method are provided. The catalyst used in the method for preparing the olefin-olefinic alcohol copolymer has a diimine metal complex as shown in Formula I.

IPC Classes  ?

• C08F 4/80 - MetalsMetal hydridesMetallo-organic compoundsUse thereof as catalyst precursors selected from metals not provided for in group selected from iron group metals or platinum group metals
• B01J 23/40 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of noble metals of the platinum group metals
• C08F 4/70 - Iron group metals, platinum group metals, or compounds thereof
• C08F 220/64 - AcidsMetal salts or ammonium salts thereof
• B01J 31/18 - Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony

Abstract

A method for recovering C2 components in a methane-containing industrial gas includes the steps of (1) cooling a compressed methane-containing industrial gas and performing gas-liquid separation; (2) absorbing C2 components in the gas phase by using an absorbent to obtain an absorption rich liquid; (3) returning the absorption rich liquid to the compression in step (1) or mixing the absorption rich liquid with the liquid phase obtained in step (1) to obtain a mixed liquid, and depressurizing the mixed liquid or the absorption rich liquid; (4) performing methane desorption on the depressurized stream to obtain a rich absorbent, or performing second gas-liquid separation on the depressurized stream, followed by methane desorption on the second liquid phase to obtain a rich absorbent; and (5) desorbing and separating the rich absorbent to obtain a lean absorbent and an enriched gas, and recycling and reusing the lean absorbent.

IPC Classes  ?

• C10L 3/00 - Gaseous fuelsNatural gasSynthetic natural gas obtained by processes not covered by subclasses , Liquefied petroleum gas
• B01D 53/00 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
• B01D 53/14 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
• B01D 53/18 - Absorbing unitsLiquid distributors therefor
• C10G 5/04 - Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas with liquid absorbents
• C10G 5/06 - Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas by cooling or compressing
• C10G 70/04 - Working-up undefined normally gaseous mixtures obtained by processes covered by groups , , , , by physical processes
• C10G 70/06 - Working-up undefined normally gaseous mixtures obtained by processes covered by groups , , , , by physical processes by gas-liquid contact
• C10L 3/10 - Working-up natural gas or synthetic natural gas
• F25J 3/06 - Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification by partial condensation

Abstract

A polymer film has a loofah-like structure. It has a fibrous framework structure formed by three-dimensional interwoven and interconnected polymer fibers and a three-dimensional interconnected network pore structure distributed in the fibrous framework structure. The polymer is an organic polymer and the fibrous framework structure is integrally formed by the polymer. The film has a volume porosity of from 50% to 95%. The film is obtained by means of a combination method for atomization pretreatment and non-solvent phase separation. The film can be used in the fields of gas filtration, liquid filtration, oil-water separation, adsorption materials, catalysis, pharmaceutical sustained release materials, anti-adhesion coatings, oil delivery and oil spill interception.

IPC Classes  ?

• B01D 69/02 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or propertiesManufacturing processes specially adapted therefor characterised by their properties
• B01D 61/14 - UltrafiltrationMicrofiltration
• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• B01D 69/14 - Dynamic membranes
• B01D 71/02 - Inorganic material
• B01D 71/16 - Cellulose acetate
• B01D 71/28 - Polymers of vinyl aromatic compounds
• B01D 71/34 - Polyvinylidene fluoride
• B01D 71/38 - PolyalkenylalcoholsPolyalkenylestersPolyalkenylethersPolyalkenylaldehydesPolyalkenylketonesPolyalkenylacetalsPolyalkenylketals
• B01D 71/42 - Polymers of nitriles, e.g. polyacrylonitrile
• B01D 71/68 - PolysulfonesPolyethersulfones
• C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
• C02F 101/32 - Hydrocarbons, e.g. oil

Abstract

9 aliphatic olefin or a mixture thereof, and the guanidine salt comprises at least one guanidine salt having the property of flame resistance. The flame-retardant antimicrobial agent has both a good antimicrobial effect and a good flame-retardant effect. A flame-retardant antimicrobial thermoplastic resin composition containing the flame-retardant antimicrobial agent also has a good flame-retardant and antimicrobial performance and a good overall performance.

IPC Classes  ?

• C08F 8/32 - Introducing nitrogen atoms or nitrogen-containing groups by reaction with amines
• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08F 4/04 - Azo-compounds
• C08F 222/08 - Maleic anhydride with vinyl aromatic monomers
• B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites

Abstract

Disclosed is a biphenol metal complex. The structure thereof is as represented by formula I, wherein R1 and R1′ are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl; R3—R7, R3′—R7′ are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl, any two adjacent groups of R3—R7 are optionally linked to form a ring, and any two adjacent groups of R3′—R7′ are also optionally linked to form a ring; M and M′ are each independently selected from the Group 4 metals; each X is independently selected from the group consisting of a hydrocarbyl having 1 to 20 carbon atoms, hydride, amido, alkoxide, alkyl sulfide, alkyl phophide, halide, diene, amine, phosphine, ether, and combinations thereof; m and n are independently an integer of from 1 to 4; and L is a divalent linking group. Disclosed is a biphenol metal complex. The structure thereof is as represented by formula I, wherein R1 and R1′ are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl; R3—R7, R3′—R7′ are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl, any two adjacent groups of R3—R7 are optionally linked to form a ring, and any two adjacent groups of R3′—R7′ are also optionally linked to form a ring; M and M′ are each independently selected from the Group 4 metals; each X is independently selected from the group consisting of a hydrocarbyl having 1 to 20 carbon atoms, hydride, amido, alkoxide, alkyl sulfide, alkyl phophide, halide, diene, amine, phosphine, ether, and combinations thereof; m and n are independently an integer of from 1 to 4; and L is a divalent linking group.

IPC Classes  ?

• C07F 17/00 - Metallocenes

Abstract

Disclosed in the present invention is a hydrogenation method for an aromatic polymer. The method comprises: bringing an aromatic polymer into contact with a hydrogenation reagent in the presence of a hydrogenation catalyst so as to hydrogenate at least some aromatic rings in the aromatic polymer, wherein the hydrogenation catalyst contains a carrier and a platinum element, a group IVA element and a rare earth metal element loaded on the carrier, and the carrier is alumina. The present invention also provides hydrogenated block copolymers, hydrogenated five-block copolymers and hydrogenated seven-block copolymers. By means of the hydrogenation method provided in the invention, the aromatic ring in the aromatic polymer can be effectively hydrogenated to obtain a higher aromatic ring hydrogenation degree, the influence on the structure of the polymer is small, and the molecular chain of the aromatic polymer before and after hydrogenation reaction is essentially not degraded. The hydrogenated block copolymers of the present invention not only have high hydrogenation degree, but also have high light transmittance, low haze and excellent impact toughness.

IPC Classes  ?

• C08F 8/04 - Reduction, e.g. hydrogenation
• C08F 297/04 - Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising vinyl aromatic monomers and conjugated dienes

Abstract

Provided are a lanthanum oxycarbonate catalyst, and a preparation method therefor and an application thereof, relating to the field of catalysts. The lanthanum oxycarbonate catalyst comprises a rod-shaped lanthanum oxycarbonate catalyst and a nearly parallelogram lanthanum oxycarbonate catalyst. The lanthanum oxycarbonate catalyst can be used for efficiently performing a methane oxidative coupling reaction at a relatively low temperature.

IPC Classes  ?

• B01J 27/232 - Carbonates
• B01J 37/10 - Heat treatment in the presence of water, e.g. steam
• C07C 2/84 - Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling catalytic
• C07C 9/06 - Ethane
• C07C 11/04 - Ethene

Abstract

The present invention belongs to the technical field of branched polyolefin materials, and discloses a branched olefin polymer, a preparation method therefor and the use thereof. The branched olefin polymer is obtained by polymerizing at least one C4-C20 nonterminal olefin monomer with optional ethylene, propylene, and C4-C20 terminal olefin monomers; and the branched olefin polymer has the following characteristics: (a) a molecular weight of 20000 to 500000 g/mol; (b) a molecular weight distribution of 3.5 to 6.0, and a bimodal structure characterized by GPC; (c) a melting point of 0ºC to 110ºC and a glass-transition temperature of -80ºC to -50ºC; and (d) having 20 to 200 methyl groups per 1000 methylene groups.

IPC Classes  ?

• C08F 110/08 - Butenes
• C08F 110/14 - Monomers containing five or more carbon atoms

Abstract

Disclosed in the present invention are a method for preparing polymer, and an obtained polymer. The method comprises: enabling olefin and unsaturated carboxylate be subjected to a polymerization reaction in the presence of a catalyst to generate an olefin-unsaturated carboxylate polymer, the catalyst comprising a primary catalyst and optionally a cocatalyst, and the primary catalyst comprising at least one complex represented by formula I, formula I', or formula I". By selecting a reacted unsaturated carboxylate monomer, catalysts, and a suitable polymerization process, a spherical and/or sphere-like polymer having good shape is directly prepared without subsequent processing steps such as granulation, and the obtained polymer product is not prone to fouling in a reactor and is convenient for transportation.

IPC Classes  ?

• C08F 220/68 - Esters
• C08F 4/70 - Iron group metals, platinum group metals, or compounds thereof

Abstract

[PCP]/[C][PCP]/[C][PCP]/[C]＝[PCP]/[C]×100%. When the propylene-based copolymer of the present invention is blended with polypropylene, the copolymer has an excellent compatibility with polypropylene, and can promote the crystallization of polypropylene and improve the mechanical properties of the obtained polypropylene material.

IPC Classes  ?

• C08F 210/06 - Propene
• C08F 210/16 - Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
• C08F 4/6592 - Component covered by group containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
• C08L 23/10 - Homopolymers or copolymers of propene
• C08L 23/14 - Copolymers of propene

Abstract

A biodegradable film is prepared from a composition that includes a copolyester obtained by extrusion reaction of a branched aliphatic-aromatic copolyester derived from monomer a, monomer b, monomer c and monomer d with an organic peroxide. The film can be completely degraded into small molecular products such as carbon dioxide, water and the like under natural or composting conditions. Moreover, the film can be prepared having a thickness of 4-50 μm as required, and its mechanical properties can reach the same level as or even better than those of LDPE film.

IPC Classes  ?

• C08G 63/183 - Terephthalic acids
• C08J 5/18 - Manufacture of films or sheets
• C08K 13/02 - Organic and inorganic ingredients
• C08L 67/02 - Polyesters derived from dicarboxylic acids and dihydroxy compounds

Abstract

Disclosed in the present invention are a polymer ultrafiltration membrane with a double-continuous high-pass porous structure, a preparation method therefor, and an application thereof. The ultrafiltration membrane comprises a bottom layer and a polymer layer, wherein the polymer layer is divided into a sub-layer and a surface layer, the surface layer being a uniform small pore structure with narrow pore size distribution, and the sub-layer being a double-continuous high-pass three-dimensional network porous structure; the double-continuous high-pass porous structure of the double-continuous high-pass ultrafiltration membrane is characterised by: in the direction of thickness of the sub-layer, the cross-sectional porosity of any XY cross-section perpendicular to the direction of thickness is 40-90%, preferably 60-90%, and more preferably 70-90%; and the difference of the cross-sectional porosity of any two XY cross-sections does not exceed 10%, preferably does not exceed 8%, and more preferably does not exceed 5%.

IPC Classes  ?

• B01D 69/12 - Composite membranesUltra-thin membranes
• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus

Abstract

A super-wet surface is a polypropylene surface, on which a hydrophilic side group is grafted, having a micro-nano structure. The super-wet surface is at least super-hydrophilic and does not contain an initiator residue. The super-wet surface is prepared by grafting, in the absence of an initiator, by means of microwave irradiation, a monomer for forming a side group, on the polypropylene surface, as a grafting base, having a micro-nano structure. In the preparation of the super-wet surface, the molecular weight of polypropylene does not decrease after grafting, there is no residual monomer or initiator residue, and the super-wetting effect of the obtained surface is lasting and stable. The super-wet surface can be used in bonding, spraying, oil-water separation, water treatment, biology, medicine and energy fields.

IPC Classes  ?

• C08J 7/18 - Chemical modification with polymerisable compounds using wave energy or particle radiation
• B01D 71/26 - Polyalkenes
• B01D 69/02 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or propertiesManufacturing processes specially adapted therefor characterised by their properties
• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• B01D 17/02 - Separation of non-miscible liquids
• C02F 1/40 - Devices for separating or removing fatty or oily substances or similar floating material
• C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis

Abstract

A diimine metal complex represented by Formula I, a preparation method therefor, and application thereof are provided. The complex is used as a main catalyst in catalysts for olefin polymerization, and can achieve catalytic ethylene polymerization at a high temperature to prepare high molecular weight branched polyethylene.

IPC Classes  ?

• C08F 4/70 - Iron group metals, platinum group metals, or compounds thereof
• C07F 15/00 - Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
• C07F 15/04 - Nickel compounds
• C08F 2/38 - Polymerisation using regulators, e.g. chain terminating agents
• C08F 4/659 - Component covered by group containing a transition metal-carbon bond
• C08F 110/02 - Ethene

Abstract

A catalyst system for olefin polymerization contains a main catalyst and a cocatalyst. The cocatalyst contains a twelve-membered ring compound represented by formula (M). The catalyst system is suitable for preparing polypropylene products having high stereoregularity and low ash, and can regulate the melt index of the products within a wide range by adjusting the amount of hydrogenation. It is also suitable for copolymerization systems to improve the copolymerization yield.

IPC Classes  ?

• C07C 43/21 - Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring containing rings other than six-membered aromatic rings
• C08F 10/06 - Propene
• C08F 10/00 - Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• C08F 110/02 - Ethene
• C08F 210/06 - Propene
• C07C 47/575 - Compounds having —CHO groups bound to carbon atoms of six-membered aromatic rings containing ether groups, groups, groups, or groups
• C08F 110/06 - Propene

Abstract

The present invention relates to the field of oilfield plugging agents, and in particular to a plugging agent for oil extraction in an oilfield and a preparation method therefor and an application thereof. The plugging agent contains ligninamide. The plugging agent can be controlled to form a gel in a wide range of reservoir degree, so that temperature resistance is improved and the gel has high strength; the plugging agent has the characteristics of high system viscosity, high plugging strength, high applicable temperature, and the like, so that the production cost of a water plugging and profile control system is effectively reduced, the requirements for the performance of on-site construction, economy, and environmental protection are satisfied, and the practicability is high.

IPC Classes  ?

• C09K 8/512 - Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents

Abstract

Disclosed are an ethylene copolymer and a method for preparing same, and a composition, crosslinked polymer, and tire containing said ethylene copolymer; the ethylene copolymer contains an ethylene structural unit derived from ethylene and a conjugated diene structural unit derived from a conjugated diene; taking the total amount of said ethylene copolymer as the reference, the content of said conjugated diene structural unit is 25–45 mol%; the conjugated diene is formed by 1,2-polymerization and the content of 1,2-polymeric vinyl structural units having side chain double bonds is 20–40 mol%; taking the total number of conjugated diene structural units in the ethylene copolymer as the reference, the total amount of said 1,2-polymeric structural units is 95 mol% or more, and the ethylene copolymer has a weight average molecular weight of 20,000 to 300,000. The ethylene copolymer of the present invention has good crosslinking properties.

IPC Classes  ?

• C08F 210/02 - Ethene
• C08F 236/04 - Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
• C08F 4/659 - Component covered by group containing a transition metal-carbon bond

Abstract

Disclosed are a catalyst suitable for synthesizing organic amines by means of catalytic amination, and preparation and use thereof. The catalyst comprises an inorganic porous carrier containing aluminum and/or silicon and active metal components supported on the carrier. The active metal components comprise at least one metal selected from group VIII and group IB. The L acid content of the carrier accounts for at least 85% of the sum of the L acid content and the B acid content. The catalyst has improved catalytic properties when used in reactions for preparing organic amines by means of catalytic amination.

IPC Classes  ?

• B01J 23/75 - Cobalt
• B01J 23/755 - Nickel
• B01J 23/78 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with alkali- or alkaline earth metals or beryllium
• B01J 23/80 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with zinc, cadmium or mercury
• B01J 23/83 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with rare earths or actinides
• C07C 211/03 - Monoamines
• C07C 209/04 - Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups

Abstract

Disclosed in the present invention is a solid component for preparing an olefin polymerization catalyst, and a preparation method therefor and an application thereof. The solid component comprises: (i) a magnesium compound as represented by the following formula (1), (ii) a Lewis base (LB), and (iii) optionally, metal components other than magnesium, wherein the LB is a compound as shown in general formula (II) or an amide compound as shown in general formula (II'). The solid component prepared in the present invention has a better particle morphology, and a catalyst prepared by using the solid component as a carrier is less likely to be crushed, and has better stereostructural orientation in olefin polymerization, particularly propylene polymerization or copolymerization.

IPC Classes  ?

• C08F 4/02 - Carriers therefor
• B01J 31/00 - Catalysts comprising hydrides, coordination complexes or organic compounds
• B01J 32/00 - Catalyst carriers in general
• B01J 35/08 - Spheres
• C08F 10/06 - Propene
• C08F 110/06 - Propene

Abstract

33-TPD method. The catalyst has improved properties when used in reactions for preparing organic amines by means of catalytic amination.

IPC Classes  ?

• B01J 23/75 - Cobalt
• B01J 23/755 - Nickel
• B01J 23/78 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with alkali- or alkaline earth metals or beryllium
• B01J 23/80 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with zinc, cadmium or mercury
• B01J 23/83 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with rare earths or actinides
• C07C 211/03 - Monoamines
• C07C 209/04 - Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of functional groups by amino groups

Abstract

Provided are a method for selective hydrogenation of butadiene extraction tail gas and a selective hydrogenation apparatus. The method for selective hydrogenation of butadiene extraction tail gas comprises: (1) feeding alkyne-containing tail gas from a butadiene extraction apparatus into a feedstock tank, and optionally removing impurities entrained in said alkyne-containing tail gas prior to feeding into said feedstock tank; (2) pressurizing the carbon C4 raw material in the feedstock tank by a material feed pump to a pressure required for reaction, then combining with recycled C4 from a buffer tank at the outlet of a one-stage reactor and then entering a one-stage mixer, mixing with hydrogen in the one-stage mixer, then entering a one-stage reactor for one-stage hydrogenation reaction, and the obtained one-stage reaction stream flowing into a one-stage reactor outlet buffer tank; the hydrogen gas required for the reaction in the one-stage reactor being dispensed in a first manner of addition or a second manner of addition; the first manner of addition is: all of the hydrogen gas required for reaction entering by means of the one-stage reactor outlet buffer tank, then entering a one-stage reactor by means of a first path at the exit of one-stage reactor outlet buffer tank; the second manner of addition is: part of the hydrogen gas required for reaction entering by means of the one-stage reactor outlet buffer tank, then entering a one-stage reactor by means of a first path at the exit of one-stage reactor outlet buffer tank; the other part of the hydrogen entering by means of the one-stage mixer, then entering the one-stage reactor; (3) the one-stage reactor outlet buffer tank has no gas-phase discharge, and the liquid-phase product is divided into at least two strands, the first strand returning to the one-stage reactor as recycled C4, the second strand entering a stabilization column as stabilization column feed or being subjected to further hydrotreating, then entering the stabilization column; (4) separating via the stabilization column and then extracting a C4 hydrogenation product.

IPC Classes  ?

• C07C 5/09 - Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by hydrogenation of carbon-to-carbon triple bonds to carbon-to-carbon double bonds
• C10G 70/02 - Working-up undefined normally gaseous mixtures obtained by processes covered by groups , , , , by hydrogenation

Abstract

Disclosed in the present invention are a thermoplastic composite material, a preparation method therefor and a use thereof. The thermoplastic composite material comprises an inner layer material and at least one layer of outer layer material. The inner layer material is a core layer comprising fiber bundles, a first thermoplastic resin and a first auxiliary agent; and the at least one layer of outer layer material wraps the core layer and is a resin layer comprising a second thermoplastic resin and an optional second auxiliary agent. The fiber bundles extend continuously from one end of the core layer to the opposite end thereof. The thermoplastic composite material of the present invention has an inner layer-outer layer composite structure, can effectively improve the processing performance of the thermoplastic composite material and the lubricity between fibers and resin matrixes during injection molding, and improves the fluidity of the fibers in a resin matrix melt; thus, the comprehensive performance and surface quality of the prepared thermoplastic composite material are greatly improved, the requirements of the injection molding process are reduced, and the application range of the thermoplastic composite material is expanded.

IPC Classes  ?

• B29C 70/16 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length
• B29C 70/52 - Pultrusion, i.e. forming and compressing by continuously pulling through a die

Abstract

Disclosed are a propylene polymer-based composite film, a preparation method therefor, and an application thereof. The composite film comprises at least two different layers: layer a and layer b, wherein layer a and layer b each comprise at least one propylene polymer, and at least one of layer a and layer b comprises a propylene impact copolymer, wherein the propylene impact copolymer comprises elastic moieties that form dispersed strip-like rubber phases in the composite film, the rubber phases are arranged parallel to each other, and the average dimension of transverse axes of the rubber phases is 20-200 nm and the average of aspect ratios is 5-20. The composite film has both excellent impact resistance and optical properties, and even has good tensile properties and/or good heat-sealing strength at lower heat-sealing temperatures, and even has good uniformity. The composite film is particularly useful in the field of packaging materials, especially in battery packaging materials, electronic product packaging materials, or food packaging materials.

IPC Classes  ?

• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins
• B32B 27/18 - Layered products essentially comprising synthetic resin characterised by the use of special additives
• B32B 27/06 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance
• B32B 27/20 - Layered products essentially comprising synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
• B32B 33/00 - Layered products characterised by particular properties or particular surface features, e.g. particular surface coatingsLayered products designed for particular purposes not covered by another single class
• C08L 23/12 - Polypropene
• C08L 53/02 - Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
• C08L 23/08 - Copolymers of ethene
• C08J 5/18 - Manufacture of films or sheets
• B29C 48/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired formApparatus therefor
• B29C 48/08 - Flat, e.g. panels flexible, e.g. films
• B65D 65/40 - Applications of laminates for particular packaging purposes

Abstract

Provided are a metal-organic framework material separation membrane and a method for preparing a metal-organic framework material separation membrane. The metal-organic framework material separation membrane comprises a base membrane and a metal-organic framework material functional layer, and the structure of the metal-organic framework material functional layer comprises an inter-embedded polyhedral structure. The preparation method for the metal-organic framework material separation membrane comprises: (1) preparing a solution containing a first organic solvent, an organic ligand, a metal compound and an auxiliary agent; (2) subjecting a base membrane to a pretreatment, involving introducing, on the surface of the base membrane, metal atoms from the metal compound of step (1); and (3) mixing the pretreated base membrane of step (2) with the solution of step (1) to obtain a first mixture, and then heating the first mixture for a reaction, so as to prepare a metal-organic framework material separation membrane. An organic gas separation membrane prepared from the present invention has the properties of a high separation coefficient, a large flux, adhesion resistance, pollution resistance, etc. during an application process.

IPC Classes  ?

• B01D 71/06 - Organic material
• B01D 71/26 - Polyalkenes
• B01D 71/30 - Polyalkenyl halides
• B01D 71/36 - Polytetrafluoroethene
• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• B01D 69/08 - Hollow fibre membranes
• B01D 53/00 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
• B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
• B01J 20/22 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising organic material
• B01J 20/30 - Processes for preparing, regenerating or reactivating
• C07C 7/144 - Purification, separation or stabilisation of hydrocarbonsUse of additives using membranes, e.g. selective permeation
• C08G 83/00 - Macromolecular compounds not provided for in groups

Abstract

Disclosed is a propylene-butene copolymer. The copolymer contains, in terms of the total amount of structural units of the copolymer, 90-99 mol% of propylene structural units and 1-10 mol% of butene structural units. The xylene solubles content of the copolymer is less than or equal to 4 wt%, and preferably less than or equal to 3 wt%. The propylene-butene copolymer is substantially free of fraction having a molecular weight lower than 1000. The copolymer has a melt flow index of greater than or equal to 20 g/10 min as measured at 230°C under a load of 2.16 kg. The propylene-butene copolymer of the present invention has the advantages of a high melt flow index and few xylene solubles, and does not contain a phthalate-based plasticizer, thereby being beneficial to the application thereof in fields such as food and medical and health services.

IPC Classes  ?

• C08F 210/06 - Propene
• C08F 210/08 - Butenes

Abstract

The present invention provides a magnesium-based solid and a solid catalyst component for olefin polymerization. By means of determination based on a nitrogen adsorption method, the solid has a multimodal pore distribution and a specific surface area of not less than 50 m2/g, and the pore size distribution of the solid is in a range of 1 nm to 300 nm. There is at least one peak within a pore size range of less than 10 nm, and there is at least another peak within a pore size range of not less than 10 nm. When the catalyst formed using the solid catalyst component is used for propylene polymerization, the catalyst has higher polymerization activity and higher stereotactic orientation capability, and the prepared polymer has a relatively wide molecular weight distribution.

IPC Classes  ?

• C08F 10/06 - Propene
• C08F 110/06 - Propene
• C08F 10/00 - Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• C08F 4/649 - Catalysts containing a specific non-metal or metal-free compound organic
• C08F 4/654 - Pretreating with metals or metal-containing compounds with magnesium or compounds thereof

Abstract

Disclosed are a catalyst spherical carrier for olefin polymerization, a preparation method therefor and an application thereof, a catalyst and an application thereof, the carrier comprising at least one magnesium-containing compound having a structure represented by formula (1). The spherical carrier of an olefin polymerization catalyst of the present invention has a relatively good particle morphology, and basically no special-shaped particles will appear. The provided method may prepare a carrier having a small particle size, which greatly expands the preparable particle size range of the carrier. When the catalyst prepared by using the obtained carrier is used for olefin polymerization, polymerization activity is good, basically no specific material is present, and hydrogen regulation sensitivity is good.

IPC Classes  ?

• C08F 4/649 - Catalysts containing a specific non-metal or metal-free compound organic
• C08F 4/64 - Titanium, zirconium, hafnium, or compounds thereof
• C08F 4/642 - Component covered by group with an organo-aluminium compound
• C08F 4/654 - Pretreating with metals or metal-containing compounds with magnesium or compounds thereof
• C08F 10/00 - Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond

Abstract

−1, and the total selectivity of 1-hexene and 1-octene exceeds 92 wt %. In a C6 product, the content of 1-hexene may reach about 97%, and in a C8 product, the content of 1-octene may reach more than 98%.

IPC Classes  ?

• B01J 31/24 - Phosphines
• C07C 2/36 - Catalytic processes with hydrides or organic compounds as phosphines, arsines, stilbines or bismuthines

Abstract

A halogen-containing compound as shown in a formula I can be used as a ligand for an ethylene oligomerization catalyst composition. The ethylene oligomerization catalyst composition containing the halogen-containing compound can be used to catalyze ethylene oligomerization, trimerization and tetramerization reactions. As a ligand of a catalyst for ethylene oligomerization, a fluoropolymer can effectively improve the catalytic performance of a catalyst system, and particularly exhibits improved activity and selectivity in an ethylene oligomerization reaction.

IPC Classes  ?

• C07C 2/36 - Catalytic processes with hydrides or organic compounds as phosphines, arsines, stilbines or bismuthines
• B01J 31/22 - Organic complexes
• B01J 31/24 - Phosphines
• C07F 11/00 - Compounds containing elements of Groups 6 or 16 of the Periodic Table

Abstract

A polypropylene composition, a preparation method therefor, and an article made therefrom, the polypropylene composition comprising: (a) 70-95% by weight of a crystalline homo-polypropylene having a isotactic pentad fraction of 96% or more and forming a continuous matrix phase in the polypropylene composition; (b) 5-30% by weight of an ethylene-propylene elastic copolymer containing 20-35% by weight of an ethylene structure unit and 65-80% by weight of a propylene structure unit, and forming a dispersed rubber phase in the continuous matrix phase, such that the rubber phase can at least partially deform under an orientation force and form an orientation state structure, wherein the ratio of melt mass flow rate measured at 230ºC and a 2.16 kg load of the crystalline homo-polypropylene and the polypropylene composition is 0.5-2.0. The polypropylene composition and article have a high gloss and good mechanical properties, and the preparation method is simple, low in cost and environmentally friendly; and the article can be used in electric appliances, homes, packaging, automobiles, toys, or the medical field.

IPC Classes  ?

• C08L 23/12 - Polypropene
• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers

Abstract

The present disclosure relates to the technical field of oilfield chemicals, and discloses an acrylamide copolymer, wherein the acrylamide copolymer comprises a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A has a structure shown in Formula (1), the structural unit B has a structure shown in Formula (2), and the structural unit C has a structure shown in Formula (3) and/or Formula (4); 12 alkyl, n is an integer between 0 and 6, and a, b and c are each independently selected from integers between 0 and 2.

IPC Classes  ?

• C08F 220/56 - AcrylamideMethacrylamide
• C08F 2/10 - Aqueous solvent
• C08F 226/06 - Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
• C08F 220/58 - Amides containing oxygen in addition to the carbonamido oxygen
• C09K 8/588 - Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers

Abstract

A continuous operation method is employed for the microwave high-temperature pyrolysis of a solid material containing an organic matter. The method includes the steps of mixing a solid material containing an organic matter with a liquid organic medium; transferring the obtained mixture to a microwave field; and in the microwave field, continuously contacting the mixture with a strong wave absorption material in an inert atmosphere or in vacuum. The strong wave absorption material continuously generates a high temperature under a microwave such that the solid material containing an organic matter and the liquid organic medium are continuously pyrolyzed to implement a continuous operation.

IPC Classes  ?

• C10G 1/10 - Production of liquid hydrocarbon mixtures from oil shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste
• B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
• B01J 19/12 - Processes employing the direct application of electric or wave energy, or particle radiationApparatus therefor employing electromagnetic waves
• C10B 19/00 - Heating of coke ovens by electrical means
• C10B 53/02 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
• C10B 53/07 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of synthetic polymeric materials, e.g. tyres
• C10G 1/02 - Production of liquid hydrocarbon mixtures from oil shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by distillation

Abstract

A porous composite material capable of generating an arc in a microwave field includes an inorganic porous framework and a carbon material loaded on the inorganic porous framework. The average pore size of the inorganic porous framework is 0.2-1000 μm. The porous composite material has an excellent mechanical performance, can generate an arc in a microwave field to quickly generate a high temperature, and thus can be used in fields such as microwave high-temperature heating, biomass pyrolysis, vegetable oil treatment, waste polymer material pyrolysis, petrochemical pyrolysis, carbon-fiber composite material recovery, waste treatment, VOC waste gas treatment, COD wastewater treatment, high-temperature catalysis, waste circuit board full-component recycling, and hydrogen preparation.

IPC Classes  ?

• B01J 6/00 - CalciningFusing
• C04B 38/00 - Porous mortars, concrete, artificial stone or ceramic warePreparation thereof
• C04B 41/00 - After-treatment of mortars, concrete, artificial stone or ceramicsTreatment of natural stone
• C04B 41/50 - Coating or impregnating with inorganic materials
• C04B 41/87 - Ceramics
• C10B 19/00 - Heating of coke ovens by electrical means
• C10B 53/02 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
• C10B 53/07 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of synthetic polymeric materials, e.g. tyres
• C10G 1/04 - Production of liquid hydrocarbon mixtures from oil shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction
• C10G 1/10 - Production of liquid hydrocarbon mixtures from oil shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste
• F23G 5/10 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of waste or low-grade fuels including supplementary heating using electric means
• H05B 6/64 - Heating using microwaves

Abstract

An anti-coking equipment, a preparation method therefor, and the use thereof. The preparation method comprises: bringing a low-oxygen partial pressure gas into contact with an equipment for reaction to obtain an anti-coking equipment containing an oxide film on the inner surface, wherein the dew point of the low-oxygen partial pressure gas is −40ºC to 40ºC. A dense and stable oxide film is formed on the inner surface of the equipment prepared by the method, which can inhibit or slow down the catalytic coking phenomenon, reduce the degree of equipment carburization, and prolong the service life of the equipment.

IPC Classes  ?

• C23C 8/16 - Oxidising using oxygen-containing compounds, e.g. H2O, CO2

Abstract

The invention relates to the technical field of heterogeneous catalytic olefin polymerization, and discloses a polyolefin catalyst, its preparation and its us. A method for preparing the polyolefin catalyst comprises: (i) providing a thermally activated mesoporous material, with the thermal activation treatment being performed at a temperature of 300 to 900° C. for a period of time of 3 to 48 hours; (ii) under an inert atmosphere, (iia) conducting impregnation treatment of the thermally activated mesoporous material with a solution containing a magnesium component and then with a solution containing a titanium component, (iib) conducting impregnation treatment of the thermally activated mesoporous material with a solution containing a titanium component and then with a solution containing a magnesium component, or (iic) conducting co-impregnation treatment of the thermally activated mesoporous material with a solution containing both a titanium component and a magnesium component, to obtain a slurry to be sprayed; and (iii) spray drying the slurry to be sprayed from step (ii), to obtain a solid polyolefin catalyst component. When used in olefin polymerization, the polyolefin catalysts prepared by using the method provided by the invention have high catalytic activities, and polyolefin products having a narrow molecular weight distribution and an excellent melt index can be obtained.

IPC Classes  ?

• C08F 110/02 - Ethene
• C08F 4/02 - Carriers therefor
• C08F 4/642 - Component covered by group with an organo-aluminium compound

Abstract

Disclosed are a sphere-like super-macroporous mesoporous material, a polyolefin catalyst, and a preparation method therefor and an olefin polymerization process. A sphere-like super-macroporous material has a two-dimensional hexagonal ordered pore channel structure; a mesoporous material has an average pore size of 10 nm to 15 nm, a specific surface area of 300 m 2/g to 400 m 2/g, and an average particle size of 1 μm to 3 μm; based on the total mass of the mesoporous material, the mass content of water in the mesoporous material is < 1 ppm; and the mass content of oxygen in the mesoporous material is < 1 ppm. When a polyolefin catalyst prepared with the mesoporous material as a carrier is used for an olefin polymerization reaction, the catalyst has a high catalytic efficiency and a polyolefin product with a narrow molecular weight distribution and a good melt index can be obtained.

IPC Classes  ?

• C08F 4/02 - Carriers therefor
• C08F 10/02 - Ethene
• B01J 35/08 - Spheres
• B01J 35/10 - Solids characterised by their surface properties or porosity
• B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
• B01J 37/00 - Processes, in general, for preparing catalystsProcesses, in general, for activation of catalysts
• B01J 37/02 - Impregnation, coating or precipitation
• C08F 10/00 - Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• C08F 4/654 - Pretreating with metals or metal-containing compounds with magnesium or compounds thereof
• C01B 33/18 - Preparation of finely divided silica neither in sol nor in gel formAfter-treatment thereof

Abstract

A carrier for an olefin polymerization catalyst contains a magnesium-containing compound and sulfur. The sulfur is at least one of an elemental sulfur, a complex sulfur, and a compound sulfur. The carrier has good particle morphology and a smooth surface, and has a narrow particle size distribution. The catalyst prepared from the carrier has high activity and good sensitivity to hydrogen regulation, and can improve the density of a polymer stack when being used for olefin polymerization.

IPC Classes  ?

• C08F 4/00 - Polymerisation catalysts
• C08F 4/659 - Component covered by group containing a transition metal-carbon bond
• C08F 10/06 - Propene

Abstract

Liquid polybutadiene, and a preparation method therefor and an application thereof. The liquid polybutadiene has a number-average molecular weight of 2,500-5,500, and a molecular weight distribution index of 1-1.2; based on the total amount of the liquid polybutadiene, the content of a 1,2-structural unit in the liquid polybutadiene is 85-95 wt%, the content of a 1,4-structural unit in the liquid polybutadiene 5-15 wt%, and the molar ratio of a cis-1,4-structural unit to a trans-1,4-structural unit in the liquid polybutadiene is 1-2:1; and the dynamic viscosity of the liquid polybutadiene at 45°С is 100-500P. The liquid polybutadiene has good flowability, good film formability, and good coating performance, and a formed coating has an improved adhesion force to a substrate.

IPC Classes  ?

• C08F 136/06 - Butadiene
• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08K 5/06 - EthersAcetalsKetalsOrtho-esters
• C08K 5/3435 - Piperidines
• C08K 5/057 - Metal alcoholates
• C08L 9/00 - Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• C09J 109/00 - Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons

Abstract

A liquid butyl benzene polymer, a preparation method for same and an application of same, as well as a composition, a polymer coating, an adhesive, and a cross-linking agent containing same. When the total weight of the liquid butyl benzene polymer is taken as a reference, in the liquid butyl benzene polymer, the content of a styrene structural unit is 15-30wt%, the content of a butadiene structural unit is 70-85wt%, and the content of a 1,2-structural unit is 60-80wt%; when the total weight of the 1,2-structural unit in the liquid butyl benzene polymer is taken as a reference, the content of a cyclized 1,2-structural unit is 20-60wt%. The coating formed by the liquid butyl benzene polymer not only has high peel strength for a substrate, but also has improved thermal expansion performance.

IPC Classes  ?

• C08F 236/10 - Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl aromatic monomers
• C08F 2/06 - Organic solvent
• C08F 297/04 - Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising vinyl aromatic monomers and conjugated dienes
• C08F 212/08 - Styrene
• C08F 212/36 - Divinylbenzene
• C08F 2/38 - Polymerisation using regulators, e.g. chain terminating agents
• C08F 36/04 - Homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
• C08F 4/08 - Metallic compounds other than hydrides and other than metallo-organic compoundsBoron halide or aluminium halide complexes with organic compounds containing oxygen of alkali metals
• C08F 4/56 - Alkali metals being the only metals present, e.g. Alfin catalysts

Abstract

A method and system for separating light hydrocarbons are disclosed, wherein the method comprises compression, cooling, absorption, desorption, rectification, cracking, and recycling cracked gas to the compression step.

IPC Classes  ?

• C10G 55/04 - Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process plural serial stages only including at least one thermal cracking step
• C10G 31/06 - Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for by heating, cooling, or pressure treatment
• C10G 53/08 - Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one sorption step
• C10G 9/00 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
• C10G 25/11 - Distillation in the presence of moving sorbents
• C07C 7/11 - Purification, separation or stabilisation of hydrocarbonsUse of additives by absorption, i.e. purification or separation of gaseous hydrocarbons with the aid of liquids
• C07C 2/84 - Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling catalytic

Abstract

Disclosed are a catalyst component and a catalyst for olefin polymerization, and an olefin polymerization method. The catalyst component comprises magnesium, titanium, a halogen and an internal electron donor, wherein the internal electron donor comprises a monocarboxylic acid ester compound and a diether compound, and the molar ratio of the monocarboxylic acid ester compound to the diether compound is (0.0035-0.7):1. By using the catalyst, a polymer having both a high isotactic index and a high melt flow index can be prepared.

IPC Classes  ?

• C08F 10/00 - Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• C07F 7/28 - Titanium compounds
• C08F 110/00 - Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• C08F 110/06 - Propene

Abstract

x(4-x)/2mm, R being selected from alkyl, aryl, vinyl or oxygen, x being greater than 0 and less than 2, and the value of m making the number average molecular weight of the organic silicon polymer be 1×10 3-1×10 6 g/mol. The catalyst has the characteristics of high activity, good hydrogen regulation copolymerization performance, high bulk density of resulting polymer powder, and a low content of fine powder in the polymer powder when applied to olefin polymerization, particularly to ethylene and α-olefin polymerization.

IPC Classes  ?

• C08F 4/654 - Pretreating with metals or metal-containing compounds with magnesium or compounds thereof
• C08F 10/00 - Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond

Abstract

A polypropylene graft containing an anhydride group and used for insulating materials and a preparation method for the polypropylene graft. The polypropylene graft containing the anhydride group comprises a structural unit derived from copolymer polypropylene, a structural unit derived from an anhydride monomer, and a structural unit derived from an alkenyl-containing polymerized monomer; by taking the weight of the polypropylene graft containing the anhydride group as a reference, the content of the structural units, in the polypropylene graft containing the anhydride group, which are derived from the anhydride monomer and the alkenyl-containing polymerized monomer and are in grafted state is 0.1-5 wt%; moreover, in the polypropylene graft containing the anhydride group, the molar ratio of the structural unit derived from the anhydride monomer to the structural unit derived from the alkenyl-containing polymerized monomer is 1:1-20; the copolymer polypropylene has at least one of the following characteristics: the comonomer content is 0.5-40 mol%, the content of a xylene soluble matter is 2-80 wt%, the comonomer content in the soluble matter is 10-70 wt%, and the intrinsic viscosity number ratio of the soluble matter to the polypropylene is 0.3-5. The polypropylene graft containing the anhydride group can give consideration to both mechanical and electrical properties at a high working temperature.

IPC Classes  ?

• C08F 255/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms
• C08F 255/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms on to ethene-propene copolymers
• C08F 222/06 - Maleic anhydride
• H01B 3/30 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances plasticsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances resinsInsulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes
• H01B 7/02 - Disposition of insulation

Abstract

A grafting-modified polypropylene material for insulating materials and a preparation method therefor. The grafting-modified polypropylene material comprises a structural unit derived from co-polypropylene and a structural unit derived from an alkenyl-containing polymerization monomer. On the basis of the weight of the grafting-modified polypropylene material, the content of the structural unit derived from an alkenyl-containing polymerization monomer and in a grafting state in the grafting-modified polypropylene material is 0.1-14 wt%. The co-polypropylene has at least one of the following characteristics: the content of the comonomer is 0.5-40 mol%; the content of the xylene soluble matter is 2-80 wt%; the content of the comonomer in the soluble matter is 10-70 wt%; and the intrinsic viscosity ratio of the soluble matter to polypropylene is 0.3:5. The material can balance both the mechanical and electrical properties at higher operating temperatures.

IPC Classes  ?

• C08L 23/12 - Polypropene
• C08L 51/06 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• B25G 1/12 - Handle constructions characterised by material or shape electrically insulating material

Abstract

A grafted polypropylene resin is prepared by a grafting reaction of a polar monomer capable of absorbing microwave so as to raise its temperature in a microwave field to more than 200° C. and a solid polypropylene resin using microwave irradiation without adding an initiator. The polar grafted polypropylene resin that does not contain initiator residues and does not have a significant reduction in molecular mass compared with a resin before grafting is obtained.

IPC Classes  ?

• C08F 2/46 - Polymerisation initiated by wave energy or particle radiation
• C08F 2/50 - Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
• C08F 255/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms
• C08G 61/04 - Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms

Abstract

A catalyst component for olefin polymerization includes magnesium, titanium, a halogen, an internal electron donor compound, and a precipitation aid. The precipitation aid includes a precipitation aid represented by general formula (I). The precipitation aid represented by general formula (I) includes isomers represented by general formula (I-a) and/or (I-b).

IPC Classes  ?

• C08F 4/64 - Titanium, zirconium, hafnium, or compounds thereof
• B01J 21/06 - Silicon, titanium, zirconium or hafniumOxides or hydroxides thereof
• B01J 31/14 - Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides of aluminium or boron
• C08F 2/06 - Organic solvent
• C08F 4/614 - Pretreating with metals or metal-containing compounds with magnesium or compounds thereof
• C08F 4/649 - Catalysts containing a specific non-metal or metal-free compound organic
• C08F 6/00 - Post-polymerisation treatments
• C08F 6/02 - Neutralisation of the polymerisation mass, e.g. killing the catalyst
• C08F 10/02 - Ethene
• C08F 110/02 - Ethene
• C08F 110/06 - Propene

Abstract

20, R being H or a methyl; and metal cations are introduced to part of structure units A in the ionomer. The ionomer shows an outstanding effect on nucleation of PET, serves as a nucleating agent for PET modification, so as to obtain a corresponding PET composition. A system and method for continuously preparing maleic acid ester ionomer microspheres and cross-linked maleic acid ionomer microspheres, so as to achieve continuous preparation, washing and separation of ionomer microspheres, effectively stabilizes the separation effect, and avoids frequent start and stop operations of a centrifuge.

IPC Classes  ?

• C08L 67/02 - Polyesters derived from dicarboxylic acids and dihydroxy compounds
• C08F 212/08 - Styrene
• C08F 212/36 - Divinylbenzene
• C08F 222/06 - Maleic anhydride
• C08L 35/06 - Copolymers with vinyl aromatic monomers

Abstract

The present invention relates to the field of fluid heat transfer, and discloses a heat transfer enhancement pipe as well as a cracking furnace and an atmospheric and vacuum heating furnace including the same. The heat transfer enhancement pipe (1) includes a pipe body (10) of tubular shape having an inlet (100) for entering of a fluid and an outlet (101) for said fluid to flow out; the internal wall of the pipe body (10) is provided with a fin (11) protruding towards the interior of the pipe body (10), the fin (11) spirally extends in an axial direction of the pipe body (10), wherein at least one of a heat insulator (14) and a heat insulating layer (17) is provided at the outside of the pipe body (10). The heat transfer enhancement pipe can reduce thermal stress of itself, thereby increasing service life of the heat transfer enhancement pipe.

IPC Classes  ?

• F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
• F28F 1/00 - Tubular elementsAssemblies of tubular elements
• F28F 13/08 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
• C10G 9/20 - Tube furnaces

Abstract

Disclosed are a method and a device for recovering C2 components in methane-containing gas. The method comprises the following steps: (1) cooling a compressed methane-containing gas and performing gas-liquid separation; (2) absorbing C2 components by using an absorbent for gas to obtain a rich absorbing liquid; (3) refluxing the rich absorbing liquid to the compressed methane-containing gas or mixing the rich absorbing liquid with the liquid obtained in step (1) to obtain a mixture solution, and reducing the pressure on the mixture solultion or the rich absorbing liquid; (4) performing methane desorption on the pressure-reduced flow to obtain a rich absorbent, or performing secondary gas-liquid separation on the pressure-reduced flow, followed by methane desorption on the second liquid to obtain a rich absorbent; and (5) desorbing and separating the rich absorbent to obtain a lean absorbent and an enriched gas, and the lean absorbent is recycled and reused. The method has a high recovery rate of C2 (and above) components, as well as low overall energy consumption.

IPC Classes  ?

• C10G 70/06 - Working-up undefined normally gaseous mixtures obtained by processes covered by groups , , , , by physical processes by gas-liquid contact
• C10G 70/04 - Working-up undefined normally gaseous mixtures obtained by processes covered by groups , , , , by physical processes
• F25J 3/02 - Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream

Abstract

Disclosed in the present invention are a polymer-based film, a preparation method therefor, and use thereof. The film has a loofah-like structure, the loofah-like structure comprises a fibrous framework structure formed by three-dimensional interwoven and interconnected polymer fibers and a three-dimensional interconnected network pore structure distributed in the fibrous framework structure, the polymer is an organic polymer and the fibrous framework structure is integrally formed by the polymer; and the film has a volume porosity of from 50% to 95%. The film is obtained by means of a combination method for atomization pretreatment and non-solvent phase separation. The film can be used in the fields of gas filtration, liquid filtration, oil-water separation, adsorption materials, catalysis, pharmaceutical sustained release materials, anti-adhesion coatings, oil delivery and oil spill interception.

IPC Classes  ?

• B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
• B01D 69/02 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or propertiesManufacturing processes specially adapted therefor characterised by their properties
• B01D 71/42 - Polymers of nitriles, e.g. polyacrylonitrile
• B01D 71/16 - Cellulose acetate
• B01D 71/34 - Polyvinylidene fluoride
• B01D 71/28 - Polymers of vinyl aromatic compounds
• B01D 71/68 - PolysulfonesPolyethersulfones
• B01D 71/38 - PolyalkenylalcoholsPolyalkenylestersPolyalkenylethersPolyalkenylaldehydesPolyalkenylketonesPolyalkenylacetalsPolyalkenylketals
• B01D 61/14 - UltrafiltrationMicrofiltration
• C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
• C02F 1/40 - Devices for separating or removing fatty or oily substances or similar floating material

Abstract

11120373712037377' are also optionally linked to form a ring; M and M' are each independently selected from the Group 4 metals; each X is independently selected from the group of: a hydrocarbonyl having 1-20 carbon atoms, a hydride ion, amino, an alkoxy, an alkylthio, an alkylphosphorus, a halide, a diene, an amine, a phosphine, an ether or a combination thereof; m and n are each independently an integer of between 1 and 4; and L is a divalent linker group.

IPC Classes  ?

• C08F 4/6592 - Component covered by group containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
• C08F 10/02 - Ethene
• C08F 210/02 - Ethene

Abstract

The present invention relates to an amino-imine metal complex represented by formula I and a preparation method and an application thereof. The complex is used as a main catalyst in catalysts for olefin polymerization, and can catalyze the polymerization of ethylene at a relatively high temperature to prepare branched polyethylene having high molecular weight.

IPC Classes  ?

• C07F 15/04 - Nickel compounds
• C08F 4/70 - Iron group metals, platinum group metals, or compounds thereof
• C08F 10/02 - Ethene
• C08F 210/16 - Copolymers of ethene with alpha-alkenes, e.g. EP rubbers

Abstract

The present invention relates to a diimine metal complex represented by formula I, a preparation method therefor, and application thereof. The complex is used as a main catalyst in catalysts for olefin polymerization, and can achieve catalytic ethylene polymerization at a high temperature to prepare high molecular weight branched polyethylene.

IPC Classes  ?

• C07F 15/04 - Nickel compounds
• C08F 10/00 - Homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• C08F 12/00 - Homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
• C08F 4/70 - Iron group metals, platinum group metals, or compounds thereof

Abstract

The present invention relates to a crude oil cracking method and system. The method comprises: delivering crude oil to a first tube group of a convection section of a cracking furnace for preheating and then performing vaporization to obtain a first gas phase and a first liquid phase; performing high-pressure extraction on the first liquid phase to obtain a non-asphalt oil and asphalt; and mixing the first gas phase and the non-asphalt oil with water vapor separately, or mixing the first gas phase with the non-asphalt oil first and then mixing the mixture with water vapor, then delivering the same to a second tube group of the convection section of the cracking furnace for heating, then delivering same to a radiation section of the cracking furnace for cracking to obtain a cracking product, and separating the cracking product to obtain a low-carbon olefin. In the present invention, after crude oil is preheated and vaporized in a cracking furnace, an obtained gas phase enters the cracking furnace, and an obtained liquid phase passes through a supercritical extraction unit to obtain a separated extract oil and the extract oil enters the cracking furnace; the method can effectively improve the crude oil cracking efficiency, improve the yield of a low-carbon olefin in the product, extend the operating cycle, and reduce coking of a gasified crude oil mixture in a cracking process.

IPC Classes  ?

• C10G 9/14 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
• C10G 55/00 - Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process

Abstract

1122120373 71208912020 hydrocarbon; M and M' are the same or different, and are selected from among group IV metals; and X is halogen;

IPC Classes  ?

• C08F 4/76 - MetalsMetal hydridesMetallo-organic compoundsUse thereof as catalyst precursors selected from metals not provided for in group selected from refractory metals selected from titanium, zirconium, hafnium, vanadium, niobium, or tantalum
• C08F 10/02 - Ethene