Abstract

A solid heat carrier catalyst for thermal desorption of organic matter-contaminated soil and a method for preparing the same. A hollow alumina ball prepared by 3D printing is taken as a solid heat carrier, copper-nickel-vanadium composite oxide is taken as a catalytic active component, and vinyltriethoxysilane is taken as a masking agent. The ball has a diameter of 30 mm to 60 mm and a thickness of 1 mm to 2 mm. An outer surface of the ball is masked with the vinyltriethoxysilane; then the ball is pierced to make an inner surface thereof connected with the outside through channels; the ball is then immersed in a catalytic active component precursor solution; and finally, drying and calcination are performed to obtain the solid heat carrier catalyst for thermal desorption of organic matter-contaminated soil. This product is widely applicable to the field of thermal desorption of organic contaminants of soil.

IPC Classes  ?

• B01J 23/847 - Vanadium, niobium or tantalum
• B01J 21/04 - Alumina
• B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
• B01J 35/02 - Solids
• B01J 37/00 - Processes, in general, for preparing catalystsProcesses, in general, for activation of catalysts
• B01J 37/02 - Impregnation, coating or precipitation
• B01J 37/08 - Heat treatment
• B01J 37/34 - Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves
• B01J 37/04 - Mixing
• B33Y 80/00 - Products made by additive manufacturing
• B33Y 70/10 - Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
• B33Y 40/20 - Post-treatment, e.g. curing, coating or polishing
• B09C 1/06 - Reclamation of contaminated soil thermally

Abstract

2 gas is reduced into liquid sulfur and sulfur powder, and sodium thiosulfate is coproduced.

IPC Classes  ?

• C01D 5/14 - Preparation of sulfites
• C01B 17/02 - Preparation of sulfurPurification
• C01B 17/04 - Preparation of sulfurPurification from gaseous sulfur compounds including gaseous sulfides
• B01D 5/00 - Condensation of vapoursRecovering volatile solvents by condensation
• B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
• B01D 53/50 - Sulfur oxides
• B01D 53/80 - Semi-solid phase processes, i.e. by using slurries

Abstract

A catalyst for inducing thermal desorption of organic matter-contaminated soil and a preparation method thereof, which uses a colloidal mixture of ferroferric oxide and ferric chloride as a catalytic active component of thermal desorption, and carbon tetrachloride as a solvent. Based on the mass of solvent, a mass percentage of catalytic active component is 0.1%-15%. Ammonia water is added dropwise to ferric chloride aqueous solution to react in oil bath to generate a ferroferric oxide colloidal solution, then ferric chloride and obtained ferroferric oxide colloidal solution are added to carbon tetrachloride, and mixed solution is continuously stirred in an oil bath to evaporate solvent water to prepare a catalyst with carbon tetrachloride as solvent. Catalyst is environmentally friendly and can induce thermal desorption of organic matters in soil. 100% desorption of chlorobenzene, o-xylene and benzo[A]anthracene can be achieved at 130° C., and energy consumption of thermal desorption is greatly reduced.

IPC Classes  ?

• B01J 31/30 - Halides
• B01J 23/745 - Iron
• B01J 27/128 - HalogensCompounds thereof with iron group metals or platinum group metals
• B01J 31/02 - Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
• B01J 35/23 - Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
• B01J 37/04 - Mixing
• B09C 1/06 - Reclamation of contaminated soil thermally
• B09C 1/08 - Reclamation of contaminated soil chemically

Abstract

2 is recovered by using a distillation process. The preparation method is low in cost, causes no secondary pollution and is high in sulfur recovery rate. The problem of low sulfur production in China at present is solved.

IPC Classes  ?

• B01J 37/03 - PrecipitationCo-precipitation
• B01D 8/00 - Cold trapsCold baffles
• B01D 53/86 - Catalytic processes
• B01J 23/10 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of rare earths
• B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
• B01J 35/23 - Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
• B01J 37/00 - Processes, in general, for preparing catalystsProcesses, in general, for activation of catalysts
• B01J 37/02 - Impregnation, coating or precipitation
• B01J 37/04 - Mixing
• B01J 37/08 - Heat treatment
• B01J 37/20 - Sulfiding
• C01B 17/04 - Preparation of sulfurPurification from gaseous sulfur compounds including gaseous sulfides

Abstract

An integrated filter material, a preparation method and an application. The filter material is composed of a commercial dust removal filter material and a catalyst that is grown on the filter material and that has a function of simultaneously decomposing nitrogen oxides and dioxins. In the preparation method, a precursor solution of manganese and cerium oxides is impregnated on the filter material, and manganese and cerium oxides are grown on the filter material by means of a chemical reaction; and vanadium oxychloride is used as a precursor of vanadium oxide and is impregnated on the filter material, reacts in water, and prepared by drying, hydrothermal and other processes. The composite filter material may remove three kinds of pollutants in flue gas at the same time, and the catalyst is firmly loaded and does not easily fall off.

IPC Classes  ?

• B01J 23/34 - Manganese
• B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
• B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
• B01D 46/02 - Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
• B01D 53/86 - Catalytic processes
• B01J 31/06 - Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
• B01J 31/36 - Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups of vanadium, niobium or tantalum
• B01J 37/02 - Impregnation, coating or precipitation

Abstract

A device for preparing a sulfite includes: a mother liquid tank and alkaline bin connected to a concentrated alkaline tank, connected to a tower reactor first reactor, one first reactor bottom output end is connected to a first gas-and-liquid mixer and another to a bubbling reaction kettle upper end, a bubbling reaction kettle gas output end is connected to the first mixer being connected to a first reactor upper portion; first reactor upper portion gas and second reactor bottom output ends are connected to a second mixer being connected to the second reactor top; and the bubbling reaction kettle is connected to a centrifugal machine or the alkaline tank, the machine being connected to a wet material bin and the liquid tank. A method includes preparing main and auxiliary absorption liquids, generating a middle slurry, reabsorbing residual gas SO2, generating a target product, separating the target product, drying and packaging.

IPC Classes  ?

• C01D 5/14 - Preparation of sulfites

Abstract

222222.

IPC Classes  ?

• C01B 17/04 - Preparation of sulfurPurification from gaseous sulfur compounds including gaseous sulfides
• C01B 17/64 - ThiosulfatesDithionitesPolythionates
• C01D 5/14 - Preparation of sulfites

Abstract

A flue gas desulfurization system and a flue gas desulfurization method achieved by using same. The system comprises an absorption tower (1), a slurry conditioner (3), an evaporative crystallization chamber (5), and a lye tank (8). The absorption tower comprises a lower absorption tower section (101) and an upper absorption section (103). The lower absorption tower section (101) is further provided with a venturi absorber (102) connected thereto. A bottom end of the absorption tower (1) is connected to a sodium hydrogen tank (2). An output end of the sodium hydrogen tank (2) is connected to the slurry conditioner (3). The slurry conditioner (3) is connected to a stock solution tank (4) by means of a centrifuge (302). An output end of the stock solution tank (4) is connected to the evaporative crystallization chamber (5) and/or the upper absorption section (103) and/or the lye tank (8). A bottom end of the evaporative crystallization chamber (5) is connected to a top input end of the slurry conditioner (3). An output end of the lye tank (8) is connected to the upper absorption section (103) and an upper part of the slurry conditioner (3). According to the method, sodium alkali is used as the absorbent by-product sulfate.

IPC Classes  ?

• B01D 53/78 - Liquid phase processes with gas-liquid contact
• B01D 53/50 - Sulfur oxides
• B01D 53/96 - Regeneration, reactivation or recycling of reactants
• C01D 5/00 - Sulfates or sulfites of sodium, potassium, or alkali metals in general
• C01D 5/16 - Purification
• C01D 5/18 - Dehydration

Abstract

The present invention belongs to the field of chemical engineering, and provided are a system and preparation method for producing sodium metabisulfite. In the method, a sulfur dioxide-containing gas passes through a first reactor, a second reactor and a third reactor in sequence, a supersaturated sodium sulfite solution passes through the third reactor, the second reactor and the first reactor in sequence, and a large amount of sodium metabisulfite is generated in the first reactor; when the sodium sulfite has completely reacted and the end of the reaction is reached, a crystal slurry containing sodium metabisulfite is extracted from the first reactor and is sent to an elutriation tank, a crude crystal slurry enters a centrifuge for separation, sodium carbonate is added to a centrifugal mother liquor so as to produce a sodium sulfite slurry which is then sent to the third reactor, and a solid wet material separated by centrifugation is sent to a dryer for drying and is then packaged into a sodium metabisulfite product; tail gas produced from drying is discharged after alkaline cleaning and dust removal in a tail gas tower, and a washing liquid produced during tail gas washing is sent to an alkali distribution tank and then returned to a reactor. The quality of the sodium metabisulfite prepared in the present invention is good, and the technological process is novel, consumes little energy, and has extensive promotional and usage value.

IPC Classes  ?

• C01D 5/14 - Preparation of sulfites

Abstract

An integrated filter material, a preparation method and an application. The filter material is composed of a commercial dust removal filter material and a catalyst that is grown on the filter material and that has a function of simultaneously decomposing nitrogen oxides and dioxins. In the preparation method, a precursor solution of manganese and cerium oxides is impregnated on the filter material, and manganese and cerium oxides are grown on the filter material by means of a chemical reaction; and vanadium oxychloride is used as a precursor of vanadium oxide and is impregnated on the filter material, reacts in water, and prepared by drying, hydrothermal and other processes. The composite filter material prepared in the present invention may remove three kinds of pollutants in flue gas at the same time, and the catalyst is firmly loaded and does not easily fall off.

IPC Classes  ?

• B01D 39/06 - Inorganic material, e.g. asbestos fibres, glass beads or fibres
• B01D 39/08 - Filter cloth, i.e. woven, knitted or interlaced material
• B01D 39/20 - Other self-supporting filtering material of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires

Abstract

22 has a high selectivity, and has a low loading of active components and a low cost, having broad market application prospects.

IPC Classes  ?

• B01J 23/888 - Tungsten
• C01B 3/22 - Production of hydrogen or of gaseous mixtures containing hydrogen by decomposition of gaseous or liquid organic compounds

Abstract

22, generation of a target product, separation of the target product, drying and packaging.

IPC Classes  ?

• C01D 5/14 - Preparation of sulfites

Abstract

A double-effect catalyst for denitration and demercuration and a preparation method therefor, belong to the technical field of environmentally friendly catalytic materials and functional filter materials. The specific steps are: (1) preparation of functional TAC porous material precursor powder; (2) formulation of an active metal ion precursor solution; and (3) preparation and molding of the catalyst. Finally, a double-effect catalyst for denitration and demercuration is prepared. The double-effect catalyst for denitration and demercuration prepared has a high efficiency of denitrification and demercuration.

IPC Classes  ?

• B01J 23/10 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of rare earths
• B01D 53/86 - Catalytic processes
• B01D 53/64 - Heavy metals or compounds thereof, e.g. mercury
• B01D 53/56 - Nitrogen oxides

Abstract

A filter material integrating dust removal, denitration and mercury removal and a preparation method therefor, relating to the technical field of environmentally friendly catalytic materials and functional filter materials. The method comprises the following specific steps: (1) uniformly mixing polytetrafluoroethylene powder, denitration and mercury-removal bifunctional catalyst powder, a diffusing agent fatty alcohol polyoxyethylene ether, a coupling agent, and a lubricant in a certain proportion, and performing stirring and blanking to prepare a catalytic filter membrane blank; (2) subjecting the prepared catalytic filter membrane blank to the processes such as calendering, stretching and membrane forming to prepare a pore-controllable catalytic filter membrane containing a denitration catalyst; (3) pretreating filter material base cloth using a treatment agent; and (4) tightly combining the pretreated filter material base cloth and the catalytic filter membrane by means of hot-pressing compounding. Finally, a filter material integrating dust removal, denitration and mercury removal is prepared. The filter material integrating dust removal, denitration and mercury removal does not powder and shed, and achieves dust removal efficiency greater than 99% and denitration and mercury removal efficiency of 90% or more.

IPC Classes  ?

• B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
• B01D 46/02 - Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
• B01D 53/86 - Catalytic processes
• B01J 23/887 - Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups

Abstract

A gas-liquid phase reactor for preparing a sulfite, comprising a reactor tank body (2); the reactor tank body (2) comprises a reactor bottom head (201) at the bottom end, a reactor cylinder (202) and a reactor top head (203), the bottom of the reactor tank body (2) is connected, by means of a stirring pump (9), to a stirring liquid reflux port (8) at the middle of the reactor tank body (2), a gas-phase raw material gas inlet (5) is located at the top end of the reactor tank body (2), a liquid raw material feed inlet (3) is located at the upper part of the reactor tank body (2), a discharge port (11) is located at the bottom end of the reactor tank body (2), and several bubbling tubes (1) are provided within the reactor tank body (2), and the bubbling tubes (1) are connected to a pipeline of the gas-phase raw material gas inlet (5).

IPC Classes  ?

• B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor
• B01J 19/24 - Stationary reactors without moving elements inside
• C01B 17/62 - Methods of preparing sulfites in general

Abstract

22exhaust gas treatment, but also greatly reduces the consumption of nitrogen; moreover, compared with conventional cyclone dust collection, the bag type dust collector (6) has higher dust collection efficiency and reduces the comprehensive energy consumption of the target products by 1.5% to 5%.

IPC Classes  ?

• F26B 3/08 - Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed