A method, apparatus, and computer program control a process in making pulp, paper, or board automatically controlling by a rules engine a dosing of a chemical agent in the process into a fibrous suspension. The rules engine receives a plurality of measurements relating to the process and maintains a plurality of rules sets, including an active rules set. Each rules set defines how the dosing depends on the measurements. The rules engine controls the dosing of the chemical agent based on the measurements and the active rules set, logs at least some of the measurements and actualised dosing of the chemical agent, and receives at least one rules set candidate. The dosing of the chemical agent is simulated with the received at least one rules set candidate based on the earlier measurements; and simulation results are output for optimising performance of the chemical agent in the process.
The present invention relates to the field of molded fiber food packaging, in particular to a blend for wet-end molded fibers and the use thereof. The blend comprises the following components: a polymer containing a repeating unit derived from styrene and a repeating unit derived from an unsaturated carboxylic acid and/or containing a repeating unit derived from styrene and a repeating unit derived from an unsaturated acid anhydride; a polysaccharide (preferably starch); and wax. The blend of the present invention does not contain any PFAS components, thus meeting environmental protection requirements while avoiding possible health risks caused by PFAS. Moreover, the blend can be applied to a wet end, which is a non-surface treatment process, thereby better meeting the requirement of molded fiber food packaging for oil/grease resistance.
The present invention relates to a composition for dewatering of a fibre suspension in a manufacture of a fibre web comprising cellulosic fibres, preferably board. The composition comprises a cationic component which comprises a cationic polysaccharide having an intrinsic viscosity of ≥1 dl/g, and an anionic polymeric component having an intrinsic viscosity ≤5 dl/g. The composition has a charge density in a range of 0.5 – 4 meq/g, at pH 7. The invention relates also to the use of composition and a method for dewatering.
Provided herein is a method for treating an aqueous cellulose fibre suspension comprising at least one microorganism in a storage tank or a storage tower of a system manufacturing a fibrous web containing cellulose fibres (such as paper, board, or tissue), the method comprising using a combination of (i) a biocide and (ii) nanobubbles comprising an oxidising gas to treat the aqueous cellulose fibre suspension in the storage tank or storage tower, wherein the storage tank or the storage tower comprises at least one inlet conduit for the aqueous fibre suspension to pass into the storage tank or storage tower, and wherein the method comprises administering the nanobubbles to the system such that the concentration of oxygen in the aqueous cellulose fibre suspension in the at least one inlet conduit is between 1 mg/l and 30 mg/l. Also provided are related methods of monitoring and controlling growth of cellulolytic microorganisms or cellulolytic activity, and of manufacturing a fibrous web product containing cellulose fibres, as well as related uses and kits suitable for use in the methods of the invention.
A method for separating iron and phosphorus from an iron phosphate-based material obtainable from a waste water treatment process is disclosed. The method may comprise leaching the iron phosphate-based material with an acid; precipitating at least a part of the iron leached from the iron phosphate-based material as ferrous oxalate, thereby forming a precipitated ferrous oxalate and a first liquid phase comprising at least a part of the phosphate contained in the iron phosphate-based material; separating the precipitated ferrous oxalate from the first liquid phase, thereby obtaining the precipitated ferrous oxalate and the first liquid phase, and collecting the first liquid phase; optionally adding an acid to the precipitated ferrous oxalate, thereby dissolving the ferrous oxalate; and optionally recovering oxalic acid from the dissolved ferrous oxalate at least partially.
The present invention relates to a novel aqueous dispersion with high biomass content for use as barrier coatings on substrates. The biomass in the dispersion comprises a combination of fibrillated cellulose and polyhydroxyalkanoate (PHA). The aqueous dispersion of the present invention provides good water-resistance, oil-resistance and oxygen barrier property, and the heat sealability thereof is also good. Meanwhile, the production process of the aqueous dispersion is environmentally friendly and sustainable, and it can be applied by a simple coating process, thus it has important application prospects.
The present invention relates to a polymer dispersion and its use. The dispersion comprises polymer in particle form dispersed in an aqueous liquid phase. The polymer particles are obtained by a radical polymerisation of monomers in a presence of a dissolved rosin component, in an aqueous polymerisation medium comprising a polymeric stabilizer. The monomers comprise a first monomer (i) selected from alkyl (meth)acrylates and a charge-carrying second monomer (ii) having a cationic charge, when measured at pH 3, selected from ethylenically unsaturated tertiary amines.
D21H 19/20 - Coatings without pigments applied in a form other than the aqueous solution defined in group comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
The present invention relates to an Aqueous defoaming composition and its use. The composition comprises at least one C10-C30 fatty alcohol, a non-ionic surfactant, optionally a wax component and/or an oil component, and an anionic lignin-based additive comprising 10 – 100 weight-% of lignin, calculated from a total dry weight of the lignin-based additive.
The present invention relates to a method for treating a chemimechanical pulping effluent. The method comprises the following steps: a) mixing a coagulant and an adsorbent with a chemimechanical pulping effluent; and b) mixing a flocculant with the effluent from step a). Compared with a traditional method, the effluent treatment method in the present invention has a better removal effect on suspended solids, turbidity and COD, and can reduce toxicity, decrease foam and improve the dryness of sludge, thereby exhibiting significant application prospects.
The present invention relates to a variant nitrile hydratase which is engineered to comprise greater activity and/or stability, nucleic acids encoding said nitrile hydratase, and microbia engineered to express said novel nitrile hydratase. Additionally the invention relates to the use of this nitrile hydratase and microbia which express said nitrile hydratase as a biocatalyst, particularly in methods for producing an amide compound from a nitrile compound, preferably for use in converting acrylonitrile to acrylamide.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Chemicals for use in industry; chemical preparations for use
in pulp, paper and board industries; chemical products for
purifying recycled fiber pulp; chemical products for
eliminating microorganisms from recycled fiber pulp;
chemical products with purifying and disinfectant properties
for use in manufacturing and recycling processes.
13.
METHODS OF REDUCING OR REMOVING SOLIDS FROM LIQUIDS
Methods of reducing or removing solids from liquids. The methods may include contacting a liquid in which solids are suspended with a polymer and a surface active agent. The surface active agent and the polymer may act synergistically to increase settling rates of the suspended solids. A liquid subjected to the methods may be obtained from a leaching process.
Methods of solvent extraction are provided, including methods that exhibit improved phase disengagement times or reduced crud. The methods may include contacting an aqueous phase and/or an organic phase with a phase disengagement agent. The phase disengagement agent may improve a phase disengagement time. The methods may include contacting an aqueous phase and/or an organic phase with a crud reducing agent.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Chemicals for use in industry; chemical preparations for use in pulp, paper and board industries; chemical products for purifying recycled fiber pulp; chemical products for eliminating microorganisms from recycled fiber pulp; chemical products with purifying and disinfectant properties for use in manufacturing and recycling processes.
Systems for producing disinfection acid and methods for producing disinfection acid. The systems may include one or more conduits having one or more reaction tubes disposed therein for producing the disinfection acid. The system may include incorporating the one or more reaction tubes into a pre-existing conduit, such as a conduit used in a wastewater treatment plant or other industrial process, so as to take advantage of the latent heat and flow rate of fluid flowing through the pre-existing conduit.
Compositions and processes for strengthening paper products are provided. The inventive compositions comprise a combination at least one cationic glyoxalated polyacrylamide (“GPAM”) comprising a high molecular weight base polymer and at least one anionic polysaccharide promoter (“APP”). The inventive process for manufacturing paper products with enhanced dry strength properties comprises adding to a fiber stock comprising cellulosic fibers at least one cationic glyoxalated polyacrylamide (“GPAM”) comprising a high molecular weight base polymer; and at least one anionic polysaccharide promoter (“APP”).
C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
Provided herein is a method for treating industrial process water to reduce or prevent proliferation of contaminating microorganisms, such as contaminating bacteria, in apparatus using the industrial process water; which method comprises administering to the water an amount of a phosphorus-scavenging microorganism so as to reduce the level of bioavailable phosphorus in the water. Also provided herein is use of a phosphorus-scavenging microorganism for the reduction or prevention of proliferation of contaminating microorganisms, such as contaminating bacteria, in apparatus using industrial process water by reducing the level of bioavailable phosphorus in the water.
C02F 103/02 - Non-contaminated water, e.g. for industrial water supply
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
C02F 103/30 - Nature of the water, waste water, sewage or sludge to be treated from the textile industry
C02F 103/36 - Nature of the water, waste water, sewage or sludge to be treated from the chemical industry not provided for in groups from the manufacture of organic compounds
The present invention relates to the field of papermaking. In particular, the present invention relates to a method for preparing a sizing agent. The method of the present invention comprises the following steps: (1) pre-adding a first part of TEA of total TEA to a HEEL-containing reaction system to obtain a TEA-pre-added HEEL-containing reaction system; and (2) adding the remaining second part of TEA of the total TEA and FACl to the TEA-pre-added HEL-containing reaction system, and reacting same, wherein the weight percentage of the first part in the total TEA is not greater than 90% of the total TEA. The present method can reduce the viscosity of reaction systems, and/or achieves toluene-free operation.
A method, apparatus and computer program for a wastewater effluent reuse at an industrial plant where process water for the industrial plant is purified from raw water and recycled wastewater effluent in a water purification system. A water quality is determined in reference stream(s), and a desired target flow ratio or a change in flow ratio between the wastewater effluent and the raw water to be taken in as an influent into the water purification system is defined based on said determining.
C02F 1/24 - Treatment of water, waste water, or sewage by flotation
C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
C02F 1/72 - Treatment of water, waste water, or sewage by oxidation
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
Provided herein is a water treatment system arranged to feed performic acid to water in need of disinfection, and control residual levels of performic acid. The system is responsive to changes in water quality and water quantity, and enables compliance with toxicity limits of disinfectant concentrations.
A method for controlling paper making includes monitoring (302) a surface level of a fibrous suspension in a storage, and identifying (303) that the surface level has decreased so that at least one emptying criterion is met and thereafter identifying that the surface level has increased so that at least one refilling criterion is met, and responsively to the identifying that the surface level has increased so that the at least one refilling criterion is met, starting to dose a biocide agent into the fibrous suspension entering the storage. A corresponding apparatus and computer program are disclosed.
This invention generally relates to methods of defoaming talc froth, talc purification methods, and metal purification methods. In particular, the disclosure provides methods of defoaming talc froth and suppressing and settling talc solids using polyamine-based talc defoamers capable of depressing talc, thereby improving talc froth defoaming rates, improving pumpability, reducing froth overflow, improving the clarity of recovered water from which talc has been removed, and allowing for recovered water to be reused in beneficiation of mined ore. The disclosed methods are especially suitable in hydro-metallurgical base metal extraction processes for nickel and copper flotation, as well as in any other industrial processes for which defoaming and depression of talc is desired.
A method and apparatus for repeatedly: acquiring images with more than three different frequency bands of a sampling object (210a, 210b, 210c) that is receiving a portion of water used in an industrial or municipal process; collecting visual data at a multitude of positions of the sampling object (210a, 210b, 210c) using the acquired images; performing spectral analysis of the collected visual data for the multitude of positions; and determining (404) a type of fouling of the sampling object (210a, 210b, 210c) based on the determined spectra.
The present method relates to a method for producing cationized starch having a cationic charge density of at least 2 meq/g. A reaction mixture comprising water, starch and an amount of cationization agent is formed and adjusted to a starting temperature, which is >40 °C and below a gelatinization temperature of the starch. At least 1 weight-% of an alkaline agent is added for catalysing a cationization reaction between the cationization agent and the starch, the reaction mixture comprising at most 40 weight-% of water and 30 – 50 weight-% of starch. The reaction mixture is kneaded at a reaction temperature of >40 °C during the cationization reaction, wherein the starch is dissolved and the reaction mixture is transformed into a highly viscous mass. The viscous reaction mixture is then dried for obtaining dried cationized starch.
A method of controlling a coagulant dosage in a water treatment system, such as for a tertiary wastewater treatment phase in a wastewater treatment system. The method comprises performing measurements indicative of post-precipitation downstream of a point at which an untreated first stream (101) and a second stream (102) treated with said coagulant (101) are joined, and using said measurements in adjusting the coagulant dosage.
Provided herein is a disinfection method for water comprising at least one microorganism and phosphorus present as inorganic phosphates and/or as organic phosphorus, the method comprising: (i) treating the water to reduce phosphorus to a concentration of 0.7 mg/1 or less; and (ii) contacting the water treated in (ii) with an amount of percarboxylic acid to provide the disinfection. Also provided herein is a disinfection method for water comprising at least one microorganism and phosphorus present as inorganic phosphates and/or as organic phosphorus, the method comprising contacting the water with an amount of percarboxylic acid to provide the disinfection, wherein the amount of percarboxylic acid is controlled based on the concentration of phosphorus in the water, and optionally also the concentration of total suspended solids in the water. Also provided herein are an apparatus and a system related to the methods, and use of a phosphorus precipitation and/or coagulation agent to reduce the amount of a percarboxylic acid required to disinfect water comprising at least one microorganism.
C02F 103/10 - Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
C02F 103/32 - Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
C02F 103/36 - Nature of the water, waste water, sewage or sludge to be treated from the chemical industry not provided for in groups from the manufacture of organic compounds
Provided herein is a method for treating water wherein the water comprises an amount of at least one dissolved sulphide and at least one microorganism, the method comprising the steps: i) contacting the water with a source of Fe2+or Fe3+ ions to reduce the amount of the at least one dissolved sulphide, and ii) contacting the water with a percarboxylic acid to provide disinfection against the at least one microorganism; wherein step ii) is performed after step i). The reduction of the amount of the at least one dissolved sulphide improves the disinfection performance of the percarboxylic acid.
C02F 103/10 - Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
C02F 103/32 - Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
C02F 103/36 - Nature of the water, waste water, sewage or sludge to be treated from the chemical industry not provided for in groups from the manufacture of organic compounds
32.
METHOD FOR PREPARING POLYALUMINUM CHLORIDE PRODUCT FOR DRINKING WATER TREATMENT
The present invention relates to the technical field of film-forming compositions. In particular, the present invention relates to a biodegradable composition and a low-temperature film-forming process using same. The biodegradable composition of the present invention comprises a biodegradable polymer, a surfactant, a cross-linking agent, and a first additive.
C08J 3/03 - Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
Compositions and processes for strengthening paper products are provided. The inventive compositions comprise a combination at least one cationic glyoxalated polyacrylamide (“GPAM”) comprising a high molecular weight base polymer and at least one anionic polymeric promoter (“APP”). The inventive process for manufacturing paper products with enhanced strength and improved wet decay properties comprises adding to a fiber stock comprising cellulosic fibers at least one cationic glyoxalated polyacrylamide (“GPAM”) comprising a high molecular weight base polymer; and at least one anionic polymeric promoter (“APP”).
A method for improving drainage in an acidic stage of the bleaching process of cellulosic fibres, followed by at least one washer stage, in which method a polymer comprising cationic functional groups is added into an acidic stage of the bleaching process and the polymer comprising cationic functional groups has a mass average molecular weight of 4 000 000 – 17 000 000 g/mol, a cationic net charge and total ionicity of 5-35 mol-% at pH 7.
Method for separating synthetic, non-cellulose fibres from cellulose fibres in processing recycled textile fibres, the method comprises adding at least one surfactant to the aqueous textile fibres suspension and subjecting the aqueous textile fibres suspension to flotation to remove the synthetic, non-cellulose fibres. The surfactant comprises at least a main surfactant comprising a synthetic non-ionic surfactant selected from a group consisting of ethoxylated or ethoxylated and propoxylated fatty alcohols or fatty acids having chain length of C14 – C24, and any mixtures thereof.
The invention relates to a method for improving strength properties of a nonwoven material. The method comprises forming a nonwoven material web comprising cellulose-based fibres and optionally drying the nonwoven material web. A strength composition is applied to the nonwoven material web. The strength composition comprises (i) a glyoxylated polyacrylamide and (ii) a natural polymer selected from non-charged and cationically charged polysaccharides, non-charged and cationically charged polysaccharide derivatives, and any of their mixtures. The invention relates also to the obtained nonwoven material and to the use of the strength composition.
D04H 1/4266 - Natural fibres not provided for in group
D04H 1/64 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
D04H 1/732 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
The invention relates to a for producing a nonwoven material by a wet-laid process comprising a hydroentangling step. A fibre dispersion comprising cellulose-based fibres is prepared and a fibrous web is formed by supplying the fibre dispersion on a screen. The fibrous web is hydroentangled in at least one hydroentangling station, and the hydroentangled fibrous web is dried for obtaining the nonwoven material. A strength composition comprising at least one cationic strength component having functional groups capable of forming a covalent bond with a carboxyl group and/or a hydroxyl group is added to the fibre dispersion before formation of the fibrous web. The invention relates also the obtained nonwoven material.
D04H 1/732 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
D04H 1/49 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
D04H 1/488 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation in combination with bonding agents
The present invention generally relates to methods and compositions for manufacture of tissue, paper, or board and for enhancing retention and drainage thereof. In particular, the disclosure provides methods for enhancing retention and drainage by addition of a retention and drainage aid comprising quick inversion cationic emulsion polyacrylamides (QIC-EPAMS) and polyvinylamine (PVAm) polymers Preparation of paper sheets under these conditions provides improved retention, gravimetric drainage rates, and DDA drainage time, without over-flocculation and allowed for significant decrease in PVAm dosage.
D21H 11/16 - Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
D21H 17/54 - Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
40.
FLOCCULANT COMPOSITION, ITS USE AND METHOD FOR LIQUID-SOLID SEPARATION
The invention relates to a flocculant composition for liquid-solid separation, preferably for increasing a solid content of sludge. The flocculant composition comprises a particulate mixture of a cationic polyacrylamide and cationized starch in a ratio from 30:70 to 80:20. The invention relates also the use of the flocculant composition and to a method for flocculating a process medium in a liquid-solid separation process, where the flocculant composition is added to the process medium comprising an aqueous phase and suspended solid material, whereafter the process medium is flocculated and dewatered.
An antimicrobial system comprising: (a) an antimicrobial compound according to Formula I and (b) an inorganic source of hypochlorite, wherein the antimicrobial compound and the inorganic source of hypochlorite are separate components or comprise a unitary composition; wherein R1, R2 and R3 independently represent a hydrogen atom; halogen atom; hydroxy group; amino group; alkylamino group, alkyl group, hydroxyalkyl group, acyl group, haloalkyl group or alkoxy group having 1 to 4 carbon atoms; or an acylamido group having 1 to 10 carbon atoms; and A represents 2-thiazolamine; 2-propenenitrile; 2-propenoic acid; alkyl ester or hydroxyalkyl ester of 2-propenoic acid having 1 to 4 carbon atoms; or —CHCHCONR5R6 group, where R5 and R6 represent independently hydrogen atom, alkyl or hydroxyalkyl having 1 to 4 carbon atoms. The antimicrobial compound and the inorganic source of hypochlorite may be used separately, sequentially or simultaneously.
An antimicrobial system comprising: (a) an antimicrobial compound according to Formula I and (b) an inorganic source of hypochlorite, wherein the antimicrobial compound and the inorganic source of hypochlorite are separate components or comprise a unitary composition; wherein R1, R2 and R3 independently represent a hydrogen atom; halogen atom; hydroxy group; amino group; alkylamino group, alkyl group, hydroxyalkyl group, acyl group, haloalkyl group or alkoxy group having 1 to 4 carbon atoms; or an acylamido group having 1 to 10 carbon atoms; and A represents 2-thiazolamine; 2-propenenitrile; 2-propenoic acid; alkyl ester or hydroxyalkyl ester of 2-propenoic acid having 1 to 4 carbon atoms; or —CHCHCONR5R6 group, where R5 and R6 represent independently hydrogen atom, alkyl or hydroxyalkyl having 1 to 4 carbon atoms. The antimicrobial compound and the inorganic source of hypochlorite may be used separately, sequentially or simultaneously.
A method for monitoring biosludge quality in a wastewater process. The method comprises determining in an in-situ analysis a first set of parameter values indicative of settled turbidity and a second set of parameter values indicative of settling speed of wastewater process samples over a period of time, correlating the first and second sets with respective values indicative of sludge volume index, and monitoring the biosludge quality on the basis of the correlating step.
There is provided a method for improving grease and oil resistance of a moulded fiber based article comprising introducing to a fiber stock a composition comprising at least one anionic polymer and cationic polymer and moulding the fiber stock. There is also provided a moulded fiber based article and a use of the composition for improving grease and oil resistance of a moulded fiber based article. There is also provided a method for preparation of a moulded fiber based article.
D21H 23/04 - Addition to the pulpAfter-treatment of added substances in the pulp
D21J 5/00 - Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch moulds
44.
A METHOD FOR IMPROVING GREASE AND OIL RESISTANCE OF A FIBER BASED ARTICLE
There is provided a method for improving grease and oil resistance of a moulded fiber based article comprising introducing to a fiber stock a composition comprising a synthetic polymer component and a cationic polymer component and thermoforming the fiber stock. There is also provided a moulded fiber based article and a use of the composition improving grease and oil resistance of a moulded fiber based article. There is also provided a method for preparation of a moulded fiber based article.
D21H 23/08 - Controlling the addition by measuring pulp properties, e.g. zeta potential or pH
D21J 3/00 - Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
D21J 5/00 - Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch moulds
The disclosure relates to a method for producing anionic saccharides by reacting saccharide with a compound having a conjugated electron withdrawing group via oxa-Michael addition reaction for producing a derivatized saccharide followed by anionizing the derivatized saccharide. The disclosure further relates to anionic saccharides and to use of the anionic saccharides, for example, as flocculants in waste water treatment, as an agent on enhanced oil recovery and as an agent in paper industry.
Alpha-1,3-glucan fibrids based additive, which comprises a mixture of alpha-1,3-glucan fibrids and a cationic branched polymer. In a method for producing an alpha-1,3-glucan fibrids based additive, linear non-charged alpha-1,3-glucan is dissolved in an alkaline solvent to obtain an alpha-1,3- glucan solution, and alpha-1,3-glucan is precipitated under shear in acidic conditions and simultaneously mixing at least one cationic branched polymer with the alpha-1,3- glucan solution to producing a suspension of the alpha-1,3- glucan fibrid based additive comprising a mixture of alpha- 1,3-glucan fibrids and cationic branched polymer.
A method for predicting chemical oxygen demand (COD) load in a waste water treatment process in connection with a pulping process is disclosed. The pulping process comprises a pulp bleaching process, wherein a waste water stream is obtained from the pulp bleaching process and conducted to the waste water treatment process, wherein the waste water treatment process comprises a primary treatment stage and a secondary treatment stage. The method may comprise obtaining a value of at least one parameter of the pulp bleaching process, wherein said parameter is indicative of COD concentration in the waste water stream, determining a predicted COD concentration and/or load in the waste water stream after the primary treatment stage and/or after the secondary treatment stage based on the value of the at least one parameter of the pulp bleaching process, and providing control information for controlling the waste water treatment process based on the predicted COD concentration and /or load in the waste water stream after the primary treatment stage and/or after the secondary treatment stage.
The present invention relates to the field of papermaking. In particular, the present invention relates to a method for preparing a sizing agent, and a sizing agent prepared according to the method. The method can reduce the viscosity of a reaction system, and/or realize toluene-free operations.
The present invention relates to a method and apparatus for degassing a monomer composition. In particular, the disclosure provides a method and apparatus for deoxygenation of monomer solutions during transfer from monomer holding tank to reactor. Degassing occurs in one pass by combining a jet of nitrogen with a monomer solution in a Venturi Injector. The inventive degassing methods and apparatus provide enhanced degassing performance.
The present invention generally relates to compositions and methods for preparation of high reaction temperature dry polyacrylamide (DPAM) polymers. In particular, the disclosure provides methods for adiabatic redox initiated free-radical polymerization of reaction mixtures comprising at least acrylamide monomers, optional free-radical scavenger stabilizers, azo initiators, and redox initiators under pH and initial temperature conditions that allow heat of polymerization to increase reaction temperatures to above 100 °C (Tmax > 100 °C). Gel polymerization under these conditions produces anionic DPAM polymers for use in variety of industrial applications with improved standard viscosity and high water-solubility.
This invention generally relates to high concentration water based defoaming compositions and methods of use thereof, as well as a method for preparing a high concentration water based defoaming composition. In particular, the disclosure provides defoaming compositions that are especially suitable in pulp and paper industry, as well as in any other processing industry when foaming is unwanted. The inventive high concentration water based defoaming compositions provide enhanced defoaming performance and display high stability.
The present invention generally relates to methods and compositions for manufacture of tissue, paper, or board and for enhancing retention and drainage thereof. In particular, the disclosure provides methods for enhancing retention and drainage by addition of a retention and drainage aid comprising reactive cationic polymers (e.g., cationic strength resins), water-soluble amphoteric terpolymers, and optionally anionic organic or inorganic microparticles. Preparation of paper sheets under these conditions provides improved retention, drainage time, STFI and burst strength, and improved hydrophobic particle control.
Method for on-site producing alkenyl ketene dimer (AKD) emulsion, in which method an AKD wax and a heated emulsifying agent solution comprising starch and/or a synthetic polymer is premixed in a two-stage premixing unit, which comprises a first low-shear premixing unit, where the heated emulsifying agent solution is mixed with the AKD wax to obtain a mixture comprising melted AKD wax and the emulsifying agent, and a second high- shear premixing unit, where the mixture comprising melted AKD wax and the emulsifying agent is mixed to obtain a pre-emulsion of AKD, and then the pre-emulsion of AKD is emulsified in an emulsifying unit. Alkenyl ketene dimer emulsion produced by the method comprises AKD and an emulsifying agent comprising starch and/or a synthetic polymer starch, and AKD has a medium value of the particle size distribution of more than 0.5 µm, typically in the range of 0.5 – 5 µm.
The invention relates to a method for flocculating solid particles in a liquid-solid separation process. The method comprises obtaining a flocculant solution comprising a cationic biopolymer having a charge density in a range of 0.5 – 2.6 meq/g and selected from cationic crosslinked α-1,3-glucan polymers, cationic graft copolymers of dextran and α-1,3-glucan, or any mixture thereof. The flocculant solution is subjected to a high shear treatment. The flocculant solution is brought after the high shear treatment into a contact with a suspension, where solid particles are dispersed in a continuous aqueous phase, and the solid particles are flocculated. The flocculated solid particles are then separated from the continuous aqueous phase.
A method for preventing rejections or for decreasing downtime of a paper, board, or tissue machine, comprising monitoring at least conductivity and a second parameter in wet end of the machine, determining whether an increased risk for rejections or machine downtime exists based on said monitoring, and taking action in the event an increased risk exists based on the determination.
A method for providing control information of a waste water treatment process for controlling an emission load to be emitted from the waste water treatment process within a predetermined time interval is disclosed.
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
60.
METHOD FOR EVALUATING EFFECT OF MICROBIAL COMMUNITY ON PRODUCTION PROBLEMS OF A PROCESS PRODUCING A CELLULOSE BASED ARTICLE
There is provided a method for evaluating effect of microbial community on production problems of a process producing a cellulose based article and/or defects of the produced cellulose based article.
C12Q 1/689 - Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms for bacteria
The present invention relates to a paper, board, or the like, strength agent, comprising cationic alpha-1,3-glucan, a paper, board, or the like, product comprising the strength agent and a method for making the product.
A method for oxidative brightening and whitening of a mined mineral is provided. The mined mineral to be brightened may be discolored kaolin clay, such as gray clay. The inventive method comprises adding to an aqueous slurry of a mined mineral to be brightened an oxidizing solution comprising a peroxyacid, such as performic acid and recovering bleached mineral of improved brightness, color and/or improved purity compared to the mineral to be brightened.
There is provided a process for producing hygienized pulp. There is also provided hygienized pulp, use of the hygienized pulp in production of paper, board, molded fiber article or other fiber based articles comprising the hygienized pulp.
The invention relates to a barrier coating structure for a sheet-like substrate comprising cellulosic and/or lignocellulosic fibres. The barrier coating structure comprises at least one first coating layer and at least one second coating layer, wherein the first coating layer is arranged in a direct contact with the second coating layer. The first coating layer comprises α-(1,3→glucan) polymer, and the second coating layer comprises a cellulose ester and a polycarboxylic acid as a crosslinker.
There is provided a composition for lithium-ion battery cathode and a method for producing the composition. There is also provided an electrode comprising an active material layer formed from the composition on a current collector.
H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M 4/1391 - Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
An antimicrobial system comprising (a) an antimicrobial compound according to Formula I (I) and (b) a stabilised chlorine compound, wherein the compounds are separate compounds or comprise a unitary composition; wherein R1, R2 and R3 independently represent a hydrogen atom; halogen atom; hydroxy group; amino group; alkylamino group, alkyl group, hydroxyalkyl group, acyl group, haloalkyl group or alkoxy group having 1 to 4 carbon atoms; or an acylamido group having 1 to 10 carbon atoms; and A represents 2-thiazolamine; 2-propenenitrile; 2-propenoic acid; alkyl ester or hydroxyalkyl ester of 2-propenoic acid having 1 to 4 carbon atoms; or —CHCHCONR5R6 group, where R5 and R6 represent independently hydrogen atom, alkyl or hydroxyalkyl having 1 to 4 carbon atoms; and wherein the stabilised chlorine compound comprises the reaction product of a reaction between active chlorine and a nitrogenous reactant selected from ammonium, urea, carbamate and dimethylhydantoin.
An antimicrobial system comprising (a) an antimicrobial compound according to Formula I (I) and (b) a stabilised chlorine compound, wherein the compounds are separate compounds or comprise a unitary composition; wherein R1, R2 and R3 independently represent a hydrogen atom; halogen atom; hydroxy group; amino group; alkylamino group, alkyl group, hydroxyalkyl group, acyl group, haloalkyl group or alkoxy group having 1 to 4 carbon atoms; or an acylamido group having 1 to 10 carbon atoms; and A represents 2-thiazolamine; 2-propenenitrile; 2-propenoic acid; alkyl ester or hydroxyalkyl ester of 2-propenoic acid having 1 to 4 carbon atoms; or —CHCHCONR5R6 group, where R5 and R6 represent independently hydrogen atom, alkyl or hydroxyalkyl having 1 to 4 carbon atoms; and wherein the stabilised chlorine compound comprises the reaction product of a reaction between active chlorine and a nitrogenous reactant selected from ammonium, urea, carbamate and dimethylhydantoin.
C02F 1/50 - Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
C02F 1/76 - Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
D21F 1/66 - Pulp catching, de-watering, or recoveringRe-use of pulp-water
67.
USE OF A CATIONIC COPOLYMER IN A MANUFACTURE OF PAPER, BOARD, TISSUE OR THE LIKE
The invention relates to a use of a cationic copolymer obtained by polymerisation of (meth)acrylamide and cationic monomers, having a standard viscosity of ≥2 mPas and a charge density at most 5 meq/g, for reducing anionic substances and/or 5 anionic particulate material in an aqueous phase of a thick fibre stock having a consistency of ≥20 g/l in a manufacture of a fibre web, such as paper, board, tissue or the like. The invention relates also to a method in a manufacture of a fibre web, such as paper, board, tissue or the like using such cationic copolymer.
The present invention provides a novel method and composition for enhancing the efficiency of starch adsorption (i.e., starch trapping) from starch-containing furnishes comprising high content of recycled fibers for use in paper making processes such as pulp, paper, or board production. A novel polymer coagulation system is disclosed in which two quick inversion cationic emulsion polymers (starch trapping polymers A and B) are co-mixed at optimal blend ratios to meet specific recycled fiber and process water requirements for different recycled fiber plants and added to furnishes prior to formation of paper or board in a paper machine. Co-mixed solutions of starch trapping polymers A and B provide synergistic enhancements in (i) starch trapping efficiency and (ii) starch retention in the produced paper or board over equivalent dosage levels of singly administered polymer A, polymer B, or conventional starch trapping products, without over-flocculation or formation of stickies.
The present invention relates to a method for estimating vapor phase corrosion load in a paper or board manufacturing system, method for controlling vapor phase corrosion load in a paper or board manufacturing system and an arrangement usable is those method. Said methods allow easy on-line follow up of the corrosion load and also adjusting biocide dosage.
The invention relates to an intermediate composition in form of an aqueous solution, having a dry solids content of 30 – 65 weight-%, for manufacture of a polyamidoamine epihalohydrin resin. The intermediate composition comprises a regulating acid, and 30 – 60 weight-%, calculated from the total weight of the intermediate composition, of a polyamidoamine derivative having covalently bound epihalohydrin groups and covalently bound azetidinium groups, wherein the intermediate composition comprises derivative bound halogen in an amount of ≤90 g/kg, calculated from the dry solids.
Method for on-site glyoxylation of polyacrylamide in paper mill, board mill or the like is disclosed. Discontinuous batch glyoxylation reaction of aqueous reaction mixture is performed. The method comprises forming or obtaining the aqueous reaction mixture having a start viscosity and comprising polyacrylamide base polymer having weight average molecular weight of 30 000-300 000 g/mol and glyoxal. Concentration of the polyacrylamide base polymer in the reaction mixture is 1.5-8% above a Critical Concentration of the polyacrylamide base polymer. A feed of an alkali is added to the reaction mixture while measuring viscosity of the reaction mixture and/or a process variable related to the viscosity of the reaction mixture and the on-site glyoxylation reaction of polyacrylamide base polymer in the reaction mixture is allowed to proceed. When a predetermined end viscosity value is attained the feed of alkali is ended and acid is added to the reaction mixture.
The present invention relates to compositions and methods for forming substantially bio-based barrier coatings suitable for application on paper and board substrates, and paper and board substrates on which are applied one or more layers of such substantially bio-based barrier coatings. The inventive bio-based barrier coatings comprise a biowax emulsion comprising one or more biowaxes, such as castor oil wax, formed by hydrogenation of a bio-based oil, such as castor oil. The barrier coating composition is formed by dispersing a biowax emulsion into a polyhydroxyalkanoate (PHA) dispersion, and may be applied as a coating e.g., on paper or board, e.g., those comprised of recycled fibers, using conventional industrial methods at ambient temperatures.
The invention relates to a method for reducing starch content of an aqueous phase, which is removed from a fibre stock preparation in a manufacturing process of paper, board, tissue or the like. The fibre stock preparation comprises a thickening step, where a fibre stock comprising cellulosic fibres originating from recycled fibre material and/or broke as well as starch dispersed in an aqueous phase is thickened from a first concentration to a second concentration by removing a part of the aqueous phase from the fibre stock. A cationic polymer obtained by copolymerisation of (meth)acrylamide and at least 25 mol-% of solely cationic monomer(s), having a standard viscosity SV of at least 1.7 mPas, is added to the fibre stock at the latest at the thickening step in order to associate the starch with the cellulosic fibres of the fibre stock.
A method for selecting a flocculating agent for use in a dewatering process for sludge in a waste water treatment plant of interest is disclosed. The method may comprise obtaining first values of a plurality of parameters measured from a sludge sample obtained from the waste water treatment plant of interest, com- paring the first values of the plurality of parameters from the sludge sample to second values of the plurality of parameters from a plurality of sludge samples obtained from other waste water treatment plants, each of the other waste water treatment plants using a flocculating agent in a dewatering process for sludge, and thereby identifying the most similar sludge sample(s) from the plurality of sludge samples, and selecting a flocculating agent to be used in the dewatering process for sludge in the waste water treatment plant of interest based on at least information available from the flocculating agent(s) used in the dewatering process(es) for sludge in the waste water treatment plant(s) with the most similar sludge sample(s).
There is provided a method for producing a water-based polymeric dispersion and a water-based polymeric dispersion. There is also provided a method for coating a substrate with a composition comprising the polymeric dispersion.
The present invention relates to compositions and methods for forming substantially bio-based barrier coatings suitable for application on paper and board substrates, and paper and board substrates on which are applied one or more layers of such substantially bio-based barrier coatings. The inventive bio-based barrier coatings comprise a biowax emulsion comprising one or more biowaxes, such as castor oil wax, formed by hydrogenation of a bio-based oil, such as castor oil. The barrier coating composition is formed by dispersing a biowax emulsion into a polyhydroxyalkanoate (PHA) dispersion, and may be applied as a coating e.g., on paper or board, e.g., those comprised of recycled fibers, using conventional industrial methods at ambient temperatures.
D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
A method for preparing arylvinylsulphones comprises reacting an aryl sulphonyl halide with a reactive solvent selected from (meth)acrylonitrile or alkyl (meth)acrylate in the presence of a Cu(I) catalyst in a first reaction mixture to form an intermediate product, wherein the Cu(I) catalyst is uncomplexed. Unreacted reactive solvent is separated from the first reaction mixture to form a second mixture. A low polarity solvent is added to the second mixture to precipitate the Cu(I) catalyst and dissolve the intermediate product to form a third reaction mixture. A base is added to the third reaction mixture, wherein the intermediate product undergoes a base-catalysed elimination of the halogen atom from the intermediate product to form an arylvinylsulphone compound preferably under cooling. The arylvinylsulphone compound, is separated from the third reaction mixture.
The present disclosure generally relates to a method of measuring dust and lint particles such as dust and lint particles that may originate from and/or during the manufacture of paper, cloth or textiles, for example, tissue and other printed fine paper and board grades, and/or the dust and lint particles that may originate from and/or during the use of paper, cloth or textiles, for example, tissue and other printed fine paper and board grades.
The present invention relates to compositions and methods for forming substantially bio-based barrier coatings on paper and board substrates. The inventive bio-based barrier coatings comprise a biowax emulsion comprising one or more biowaxes, such as castor oil wax, formed by hydrogenation of a bio-based oil, such as castor oil. The barrier coating composition is formed by dispersing a biowax emulsion into a polyacrylate carrier dispersion, and may be applied as a coating e.g., on paper or board, e.g., those comprised of recycled fibers, using conventional industrial methods at ambient temperatures.
D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
The present invention relates to compositions and methods for preparation of stable alkenyl succinic anhydride (ASA) sizing emulsions which potentially may be used in the manufacturing of paper and board. In particular, the disclosure provides methods for dual emulsification of ASA using a cationic polymer as the primary emulsification agent and cationic starch as the secondary emulsification agent which provides for considerable reduction in overall starch utilization compared to conventional natural polymer ASA emulsification applications. The present invention also relates to processes for producing high ash paper and board using these ASA sizing emulsions.
D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
81.
SOFTENER CONCENTRATE, SOFTENER EMULSION, METHOD FOR PRODUCING SOFTENER EMULSION AND ITS USE
The present invention provides a softener concentrate and a softener emulsion comprising imidazoline-based surfactant, lanolin-based softener, phospholipids and surfactant blend. The present invention further provides a process for producing a softener emulsion and controlling the viscosity of a softener emulsion. The present invention also provides a method for producing paper, tissue or paperboard, in which method a softener according to the present invention is used.
The invention relates to a method for making a multi-layered board in a board machine. The multi-layered board comprises at least two layers. A first fibre suspension comprising cellulosic fibres is obtained for a first layer and a second fibre suspension comprising cellulosic fibres is obtained for a second layer, wherein the first and second fibre suspensions are different from each other and at least one of them comprises recycled cellulosic fibres. A multi-layered board web is formed by combining the first layer and the second layer with each other before wet- pressing of the web in a press section. Glyoxylated polyacrylamide having a number average molecular weight of at least 15 000 g/mol is added into the first fibre suspension and/or the second fibre suspension before forming the first layer and the second layer.
D21F 11/04 - Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibreboard production, on paper-making machines of the Fourdrinier type paper or board consisting of two or more layers
D21H 17/37 - Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
83.
A TREATMENT SYSTEM, ITS USE AND METHOD FOR TREATING EFFLUENT AND/OR SLUDGE
The invention relates to a treatment system and method for treating effluent and/or sludge from a manufacturing process of cellulosic pulp or a fibrous cellulosic web, such as paper or board. The effluent and/or sludge is in form of a suspension comprising solid material and/or particles suspended in an aqueous liquid phase. The treatment system comprises a water-soluble cationized polysaccharide component comprising cationized cellulose having a charge density of at least 1.5 meq/g dry, measured at pH 4, and a synthetic cationic copolymer of (meth)acrylamide and at least one cationic monomer, the copolymer having a charge density of at most 5 meq/g.
C02F 11/147 - Treatment of sludgeDevices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
Provided is the use of a film of a cellulose ester as a barrier against moisture and oil. The cellulose ester has free hydroxyl groups and ester substituents. The ester substituents are each individually selected from C1 to C6 alkyl ester groups. The free hydroxyl groups are present in an amount in the range 15% to 40 mol %. The film is useful as a barrier layer for food packaging. Also provided is a composition comprising the cellulose ester and a further film-forming material, a packaging material comprising a film of the composition, and a method for manufacturing the packaging material.
A method for producing long chain cellulose esters by a mechanochemical synthesis. The method comprises esterification of cellulose by mixing and subjecting to mechanical forces at least cellulose, a fatty acid and/or a fatty acid derivative comprising a chain length of at least C6, an alkali salt, and a neutral or alkaline drying agent, wherein the long chain cellulose esters are obtained, which cellulose esters comprise a fatty acid having chain length of at least C6. In a method, esterification of cellulose is performed without using any organic solvents.
The invention relates to a composition for providing barrier properties for a cellulosic fibre web, such as paper, board or the like. The coating composition comprises microfibril lated non-wood biomass, having a particle size D90<250 μm and particle size D50<100 μm, which microfibrillated non-wood biomass comprises at least 5 weight-% of a hemicellulose fraction and/or pectin, calculated from the dry weight of the microfibrillated non-wood biomass; an auxiliary agent comprising at least one cellulose derivative, and/or a synthetic binding agent, such as polyvinyl alcohol or polystyrene acrylate copolymer.
The present invention relates to a method for producing cationic saccharides by reacting saccharide with a compound having a conjugated electron withdrawing group via oxa-Michael addition reaction for producing a derivatized saccharide followed by cationizing the derivatized saccharide. The present invention further relates to use of the cationic saccharides as flocculants and as strength agents.
Industrial methods which utilize microwave-based sensors to detect in real-time the total solids content of aqueous solid colloidal dispersions such as oil sands tailings streams are provided. Optionally, these microwave-based sensors may be utilized in combination with automatic cleaning systems or filters, which prevent sensor fouling and allow for extended sensor use without manual cleaning. The output signals from the microwave sensor are used to adjust desired process parameters, e.g., the dosage of chemical additives and/or to maintain total solids within specified limits.
C08L 95/00 - Compositions of bituminous materials, e.g. asphalt, tar or pitch
C10C 3/14 - SolidifyingDisintegrating, e.g. granulating
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
89.
SURFACTANT COMPOSITIONS DERIVED FROM WASTE STREAMS, AND METHODS
Compositions, such as surfactant compositions, and methods of forming compositions, such as surfactant compositions, which may include a gemini surfactant. The methods may use a starting material from a waste stream from another process.
C07C 215/08 - Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being saturated and acyclic with only one hydroxy group and one amino group bound to the carbon skeleton
C07C 217/08 - Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one etherified hydroxy group and one amino group bound to the carbon skeleton, which is not further substituted the oxygen atom of the etherified hydroxy group being further bound to an acyclic carbon atom
C07C 219/06 - Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having the hydroxy groups esterified by carboxylic acids having the esterifying carboxyl groups bound to hydrogen atoms or to acyclic carbon atoms of an acyclic saturated carbon skeleton
C07C 219/20 - Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being unsaturated
C11D 1/18 - Sulfonic acids or sulfuric acid estersSalts thereof derived from amino alcohols
90.
TREATMENT OF TAILINGS USING SYNERGISTIC COMBINATION OF FLOCCULANT, COAGULANT, AND 'PROCESS ADDITIVE'
The invention generally relates to novel methods of treating tailing, e.g., tailings obtained from oils sands or mining operations, by the addition of at least one flocculant, process additive, and coagulant and tailing compositions obtained using these methods.
C02F 11/14 - Treatment of sludgeDevices therefor by de-watering, drying or thickening with addition of chemical agents
C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
C02F 9/00 - Multistage treatment of water, waste water or sewage
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
C02F 103/10 - Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
C02F 1/24 - Treatment of water, waste water, or sewage by flotation
B01D 21/01 - Separation of suspended solid particles from liquids by sedimentation using flocculating agents
A method in which a sample analysis vessel is provided with a water sample from a sampling point upstream of a solid-liquid separation unit. Said providing a sample analysis vessel with a water sample comprises sucking the sample into the sample analysis vessel via a sample line by a suction pump positioned after the sample analysis vessel.
The present invention relates to a method for producing cationic saccharide comprising providing a mixture comprising betaine aldehyde and a saccharide; allowing the betaine aldehyde to react with the saccharide; and obtaining cationic saccharide. The present invention additionally relates to use of the cationic saccharide in water treatment and in paper treatment.
The invention relates to a method for producing cationized starch having a degree of substitution of at least 0.2. The method comprises providing a process mixture comprising starch dispersed in a liquid process medium comprising water and an organic liquid, and allowing the starch to interact with a cationizing agent in a cationization step. After this the process mixture comprises cationized starch dispersed in the liquid process medium comprising reaction by-products formed. The cationized starch is separated from the liquid process medium in a separation step. The liquid process medium is divided in a distillation step into an organic liquid phase and a water phase, wherein the water phase comprises the reaction by-products. The organic liquid phase is recirculated back to any process step where the organic liquid is present.
The present invention provides novel amphoteric emulsion polymers, aqueous compositions containing these amphoteric emulsion polymers, methods for making, and applications thereof for improving retention and vacuum and press dewatering in the manufacturing of paper or board. In particular, the present invention relates to the use amphoteric emulsion polymers, with and without silica, in papermaking processes and other processes which may involve the use of hard water during polymer makedown and/or the treatment of compositions comprising recycled and unbleached high-yield fibers and/or the treatment of compositions comprising colloidal materials and hydrophobic agglomerates and particles. More particularly, the present disclosure relates to the use of these novel amphoteric emulsion polymers as drainage aids, broke fixatives, retention/drainage cationic boosters for colloidal silica retention and drainage programs, and flocculants in water quantity and quality management (WQQM) applications.
The present invention relates to a strength composition for manufacture of paper, board or the like. The composition is in form of a dry particulate mixture and has a dry solids content of at least 80 weight-%. The composition comprises cationic starch, having a degree of substitution, DS, >0.12, preferably >0.14, and an anionic polymeric component, wherein the composition has a net anionic charge density in a range from -0.30 to -2.0 meq/g, when dissolved in water, at pH 7. The invention also relates a method for dissolving the strength composition.
The invention relates to an aqueous dispersion of alkyl ketene dimer. The aqueous dispersion comprises alkyl ketene dimer particles dispersed in an aqueous continuous phase and a stabilizing agent which is a cationic α-(1,3→glucan) polymer. The aqueous dispersion comprises more alkyl ketene dimer than cationic α-(1,3→glucan) polymer, given as weight-%.
The present invention relates to an aqueous dispersion of alkyl ketene dimer. The aqueous dispersion comprises alkyl ketene dimer particles dispersed in an aqueous continuous phase, and an anionic lignin-carbohydrate complex where lignin and carbohydrate are covalently bound with each other as a stabilizing agent.
There is provided a surface size composition comprising interpenetrating polymer network of anionic polyacrylamide and starch, and zirconium carbonate. The surface size composition may further comprise an additional polymer such as starch and a hydrophobation agent. Additionally, there is provide use of the surface size composition for surface sizing paper or board.
The invention generally relates to a novel combination comprising 2 different cationic polymers and engineered cellulose additive (ECA) and the use thereof for promoting the retention of engineered cellulose additives (ECAs) to anionic fibers and colloids and in the fiber web during papermaking, optionally wherein the papermaking process predominantly or entirely uses Kraft or virgin fibers.
The present invention relates to a polymer dispersion, which comprises polymer particles dispersed in an aqueous continuous phase. The polymer particles are obtainable by a radical polymerisation of one or more vinyl monomers comprising alkyl (meth)acrylates. A rosin component is dissolved into at least one of the vinyl monomers before the radical polymerisation of the vinyl monomers, and the radical polymerisation is conducted in the presence of the rosin component. The invention relates also to the use of the polymer dispersion for surface sizing of a cellulosic fibre web and to a method for producing a polymer dispersion.
D21H 19/20 - Coatings without pigments applied in a form other than the aqueous solution defined in group comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
