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
4.
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.
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.
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 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.
10.
PREPARATION OF A HIGH REACTION TEMPERATURE DPAM HAVING IMPROVED STANDARD VISCOSITY AND WATER SOLUBILITY
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.
13.
USE OF AMPHOTERIC EMULSION POLYMERS WITH STRENGTH RESINS AS RETENTION AND DRAINAGE AIDS
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
20.
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
27.
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 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.
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
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
41.
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
43.
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
49.
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
50.
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
09 - Scientific and electric apparatus and instruments
Goods & Services
Machines for mixing, dosing, ejecting and injecting process
chemicals used in the liquid flows of papermaking and
process industry. Dosing dispensers, systems and instruments for supplying
measured dosages of chemical fluids.
62.
A METHOD FOR ESTIMATING DISTURBANCES AND GIVING RECOMMENDATIONS FOR IMPROVING PROCESS PERFORMANCE
The invention provides a method for estimating disturbances and giving recommendations for process performance of a water intensive industrial process. The method takes into account a huge number of process variables.
The present invention provides methods for forming a polymer mixture comprising an aqueous component and a polymer component which method comprises the monitoring of polymer content by refractometry during the method. The present invention also provides methods for adjusting parameters of mixing based on detected refractive indices. The present invention also provides methods for monitoring and modulating aqueous component inlet feed quality based on detected refractive indices.
C09K 19/02 - Liquid crystal materials characterised by optical, electrical or physical properties of the components, in general
G01B 11/04 - Measuring arrangements characterised by the use of optical techniques for measuring length, width, or thickness specially adapted for measuring length or width of objects while moving
64.
DEFOAMER COMPOSITION, METHOD FOR MAKING A DEFOAMER COMPOSITION, AND METHOD FOR DEFOAMING AN INDUSTRIAL PROCESS STREAM
A defoamer composition, method for making the defoamer emulsion, and a method for defoaming an industrial process steam. The defoamer composition comprises a microcrystalline wax and a long chain fatty alcohol in an aqueous emulsion. The defoaming compositions may be used effectively and efficiently in relatively high temperature industrial process streams.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Chemicals, chemical substances, chemical materials and chemical preparations for use in industry, science and photography, as well as in agriculture, horticulture and forestry; Unprocessed artificial resins; Biological preparations for use in industry and science; Chemicals, chemical substances, chemical materials, chemical preparations and biological preparations for use in oil and gas industries, pulp and paper industries and biogas industry; Cationic polymers; anionic and nonionic polymers; Chemical polymers; Flocculants, flocculating agents; Coagulants; Flocculating chemicals for treating waste and industrial process water; chemicals and biological preparations for use in treating, clarifying and purifying water and wastewater and for sludge treatment and dewatering..
66.
DEFOAMER COMPOSITION, METHOD FOR MAKING A DEFOAMER COMPOSITION, AND METHOD FOR DEFOAMING AN INDUSTRIAL PROCESS STREAM
A defoamer composition, method for making the defoamer emulsion, and a method for defoaming an industrial process steam. The defoamer composition comprises a microcrystalline wax and a long chain fatty alcohol in an aqueous emulsion. The defoaming compositions may be used effectively and efficiently in relatively high temperature industrial process streams.
The invention relates to a use of a composition comprising a cationic biopolymer as a drainage agent and/or as a dewatering agent in a manufacture of pulp or of a fibrous web comprising cellulosic fibres. The cationic biopolymer is selected from cationic crosslinked α-(1,3-glucan) polymers, cationic ester- or ether-derivatives of graft copolymers of dextran and α-1,3-glucan or any of their mixtures. The invention relates also to a method for increasing dewatering and/or drainage in a manufacture of pulp or of a fibrous web.
C08G 65/26 - Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
A method of manufacturing an aqueous dispersion of a polymer comprises preparing an aqueous medium, the aqueous medium being an aqueous emulsion or suspension of a water-insoluble plasticiser, the aqueous medium including a dispersant; preparing a polymer melt; and combining the aqueous medium and the polymer melt to form the aqueous dispersion. By providing an aqueous medium comprising the combination of a water-insoluble plasticiser and a dispersant, it is made possible to prepare an aqueous dispersion of a polymer without the use of organic solvents and without pressurizing the aqueous medium or polymer melt. Also provided are a method of manufacturing a coated substrate using the aqueous dispersion; an aqueous dispersion of a polymer; and a use of an aqueous medium.
The present embodiments generally relate to compositions and methods for the treatment of fluids in need of treatment, such as, for example, industrial wastewaters. The compositions and methods for treating the fluids in need of treatment generally comprises the use of one or more stable ferrous products in amounts effective to treat said fluids.
The invention relates to a method for producing a modified cationized polysaccharide. The method comprises preparing a reaction slurry by mixing of a starting material comprising a polysaccharide, preferably cellulose, and an alkaline liquid medium comprising an organic liquid, allowing the polysaccharide to interact with the alkaline liquid medium in the reaction slurry at a pre-treatment temperature under a pre-determined reaction time, and adjusting the temperature of the reaction slurry to modification temperature, which is less than the boiling point of the alkaline liquid medium. A cationizing agent and an alkylation agent, which comprises an epoxy group, are added to the reaction slurry at the modification temperature, and the polysaccharide is allowed to react with the alkylation agent and the cationizing agent, preferably under inert atmosphere, and obtaining a modified cationized polysaccharide product in solution form. The invention relates also to the modified cationized polysaccharide and its use as flocculation agent.
The present invention relates to the field of paper. In particular, the present invention relates to a method for purifying a sizing agent. The method can produce a sizing agent having a reduced content of harmful components, and the sizing agent can be used for paper, especially food contact/packaging paper. In particular, the present invention relates to the use of anhydride of formula (VI) for reducing the amide content in an alkyl ketene dimer preparation method. Y-C(O)-O-C(O)-Z (VI).
The invention relates to an aqueous composition for providing at least one barrier property, such as grease, oil and/or water barrier property, for a product comprising cellulosic fibres, and to the use of the composition. The composition comprises α- (1,3→glucan) polymer and at least 0.1 weight-% of alkyl ketene dimer, calculated from dry solids weight of the composition.
09 - Scientific and electric apparatus and instruments
Goods & Services
(1) Machines for mixing, dosing, ejecting and injecting process chemicals used in the liquid flows of papermaking and process industry.
(2) Dosing dispensers, systems and instruments for supplying measured dosages of chemical fluids.
09 - Scientific and electric apparatus and instruments
Goods & Services
Dosing machines for use in ejecting, injecting, and mixing process chemicals used in liquid flows in the papermaking and process industry Mechanical devices, namely, dispensers to present measured portions of chemical fluids; Dosage dispensers for measuring and dispensing portions of chemical fluids, not for medical use
The invention provides a control arrangement where the controller is arranged to drive the actuator utilizing automatically the explanation values. The control arrangement has a controller, which is arranged to drive an actuator. The control arrangement comprises also a setpoint controller, which is arranged to utilize deviations between explanation values of machine learning and normal explanation values of machine learning. The setpoint controller forms a setpoint value for the controller.
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
The invention relates to a method for flocculating solid particles in a liquid-solid separation process. The method comprises obtaining a suspension of solid particles suspended in a continuous aqueous phase, and obtaining cationized cellulose, which has a charge density of at least 1.5 meq/g dry, measured at pH 4, and a 2% salt viscosity of at least 50 mPas. The cationized cellulose is subjected at a process concentration to a process shear force in a high shear step, wherein the process shear force corresponds or is larger than a default shear force which produces an increase in the 2% salt viscosity of the cationized cellulose by at least a factor of 2. After the high shear step the cationized cellulose is brought into a contact with the suspension of solid particles and flocculating the solid particles; and the flocculated solid particles are separated from the continuous aqueous phase in a dewatering step.
The invention provides a diagnostic arrangement, which utilizes pre-processed measurement data, ML values and explanation values. By using all these values/data it is possible to analyse phenomenon, events, and behaviour of the process in such a way that a number of aspects can be taken into account.
The invention provides a way to monitor a process (1). The invention utilizes explanation values. A ML model of the process is created. The ML model utilizes measurements from the process as inputs to the ML model and forms model outputs. The inputs are classified to groups in the. The explanation values are calculated for each input indicating contribution of the input to the model output/s, and a sum of the explanation values for each group are calculated. The calculated sums are monitored, each sum indicating status of the group in question.
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
The invention relates to method and composition for treating tailings from a separation process, where bitumen is separated from mineral solids. Tailings comprise an aqueous phase with suspended solid particulate material and residual bitumen and have a dry solids content <25 weight-%. The method comprises addition of a flocculating agent comprising polyacrylamide to the tailings, as well as addition of an auxiliary agent comprising ionic liquid to tailings in conjunction with the flocculating agent. Flocs, which comprise solid particulate material, are formed and the formed flocs are separated from the aqueous phase. The composition comprises a copolymer of (meth)acrylamide and an auxiliary agent comprising ionic liquid.
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
B01D 21/00 - Separation of suspended solid particles from liquids by sedimentation
B01D 21/01 - Separation of suspended solid particles from liquids by sedimentation using flocculating agents
B01D 21/26 - Separation of sediment aided by centrifugal force
The invention relates to a method for flocculating solid particles in a liquid-solid separation process. The method comprises obtaining of a suspension of solid particles suspended in a continuous aqueous phase and obtaining a flocculant solution comprising cationized starch having an original charge density <3 meq/g. The flocculant solution is subjected to a high shear treatment, and after the high shear treatment the flocculant solution is brought into a contact with the suspension of solid particles and the solid particles are flocculated. The flocculated solid particles are separated from the continuous aqueous phase in a dewatering step.
In a water treatment system, a pretreatment chemical is added to water stream in a pretreatment process including a coagulation, flocculation and separation to reduce amount of dissolved and/or particulate matter in the water stream. Hydrophobic conditions in the water stream are monitored upstream or downstream from adding the pretreatment chemicals. Dosing of the pretreatment chemical to the water stream is controlled based on the monitored hydrophobic conditions. Thereby a membrane fouling in subsequent membrane filtration stage can be minimized.
C02F 1/24 - Treatment of water, waste water, or sewage by flotation
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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
C02F 103/02 - Non-contaminated water, e.g. for industrial water supply
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
82.
A TREATMENT SYSTEM FOR MANUFACTURE OF PAPER, BOARD OR THE LIKE
The invention relates to a chemical treatment system for manufacture of paper, board or the like and to a method employing it. The system comprises a first component, which is a glyoxylated polyacrylamide having a net cationic charge density and obtained by glyoxylation of a cationic polyacrylamide base polymer having a weight average molecular weight MW in a range of 30 000-500 000 g/mol. The system further comprises a second component, which comprises a mixture of at least a high-amylopectin starch, and an anionic first polymer, which has a weight average molecular weight MW>200 000 g/mol. The second component has a net cationic charge density in a range from 0.05 meq/g to 0.9 meq/g, when measured at pH 2.8, and a net anionic charge density in a range from −2 meq/g to −0.1 meq/g, when measured at pH 7.
There is provided an aqueous dispersion comprising 40-90 wt-% ethyl cellulose and 10-50 wt-% at least one plasticizer, and to a film having water barrier property produced from the dispersion. Additionally, there is provided a fiber based substrate comprising at least one film layer produced from the aqueous dispersion.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Chemicals, chemical substances, chemical materials and
chemical preparations for use in industry and science;
chemical preparations, chemical products and chemical
auxiliaries for the textile industry, nonwoven industry and
for textile recycling; chemicals and chemical preparations
for water and wastewater treatment and purification;
chemicals and chemical preparations for sludge treatment;
wet strength chemical agents; flotation chemical agents;
sizing preparations; bleaching preparations for industrial
purposes; binding substances for industrial use; unprocessed
artificial resins, unprocessed plastics; adhesives for use
in industry; chemical polymers; anionic polymers;
polyacrylamides.
12122, wherein the difference is the system ΔrH, comparing the system ΔrH to a pre-defined target ΔrH, wherein the pre-defined target ΔrH corresponds to a required biocidal performance in the water treatment system, and adjusting the amount of biocide that is dosed into the water based on a deviation of the system ΔrH from the target ΔrH.
C02F 1/00 - Treatment of water, waste water, or sewage
C02F 1/72 - Treatment of water, waste water, or sewage by oxidation
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
C02F 1/76 - Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
86.
STABLE CATIONIC POLYACRYLAMIDE DISPERSIONS AND USE THEREOF IN PAPERMAKING
The present disclosure generally relates to aqueous cationic polyacrylamide (CPAM) dispersions, methods of preparation and methods of use thereof, particularly in the paper industry. For example, these CPAM dispersions may be used in any of the following: (i) sticky control in paper manufacturing (ii) fixing in paper manufacturing, (ii) sludge dewatering, and/or (iii) oil-water separation. Moreover, the present disclosure generally pertains to CPAM dispersions, wherein such CPAM dispersions are aqueous dispersions which are shelf stable at room temperature, methods of preparation and methods of use thereof in papermaking applications and in products such as paper-based products. The disclosed CPAM dispersions may be used as retention aids in papermaking processes, may increase retention of starch to a formed paper web and/or board web, and may provide increased dry strength to paper-based products.
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 with a phase disengagement agent. The phase disengagement agent may improve a phase disengagement time. The methods may include contacting an aqueous phase with a crud reducing agent.
The invention relates to a method for reducing bacterial endospores in an aqueous fibre suspension comprising recycled cellulosic fibres, wherein the fibre suspension has an original endospore amount, preferably of ≥10 000 CFU/ml. The method comprises adjusting the pH of the fibre suspension to a pH value of ≤6.5, adjusting the oxidation-reduction potential (ORP) of the fibre suspension to an ORP value of ≥200 mV with a first oxidizing agent, and introducing an amount of performic acid as a second oxidizing agent to the fibre suspension for reducing the bacterial endospores to an endospore amount of ≤1000 CFU/ml.
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.
The invention relates to a method for producing coagulant aluminium salts. Raw material comprising at least one aluminium oxide compound is mixed with a process acid or a base to form a reaction mixture, which is heated to a reaction temperature of at least 100° C. at a reaction pressure. The aluminium oxide compound is allowed to react with the process acid or the base. The aluminium oxide compound is selected from a group consisting of amorphous aluminium oxide, γ-aluminium oxide, η-aluminium oxide, χ-aluminium oxide, or any of their mixtures. The reaction pressure is at least 2 bar(g).
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.
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
92.
METHOD FOR TREATING PAPER OR BOARD MILL SLUDGE FOR REUSE
Here is provided method relating to treating waste, more specifically sludges removed from paper or board production, such as recycled fibre (RCF) production. The disclosure relates to a method for treating said sludge in order to improve reusability thereof, particularly, as conditioned sludge in said paper or board production processes. Herein is also provided uses in a paper or board mill of said conditioned sludge obtained by said method.
The invention relates to a method of preparing arylvinylsulphones. The method comprises forming o a first reaction mixture comprising a catalyst complex of Cu(I)halide and a ligand, wherein the ligand is selected from mono-, bi- or polydentate amine ligands and further comprises an organic sulphonate; a reactive solvent selected from (meth)acrylonitrile or alkyl (meth)acrylate; and an aryl sulfonyl halide reactant. A reaction is allowed to proceed in the first reaction mixture at an elevated temperature, whereby an intermediate product is obtained. The unreacted reactive solvent is separated from the first reaction mixture, and the intermediate product is dissolved to a low polarity solvent to form a second reaction mixture. A base is added to the second reaction mixture, wherein the intermediate product undergoes a base-catalyzed elimination of the halogen atom from the intermediate product to form the compound according to Formula (I), preferably under cooling. Finally, the desired compound is separated from the second reaction mixture.
The invention relates to a control system for a copper extraction process having at least a leaching phase, a solvent extraction phase and an electrowinning phase, the leaching phase comprising a post leach thickener. The control system comprises first measuring units to measure volume and total suspended solids in an influent of the post leach thickener, and at least one second measuring unit to measure at least total suspended solids relating to effluent of the post leach thickener. The control system comprises also a control unit to receive measurements of the first measuring units and the second measuring units. The control unit forms a control signal to a polymer dosing into the influent of the post leach thickener, and another control signal to an organic solvent dosing in the solvent extraction phase.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
(1) Chemicals, chemical substances, chemical materials and chemical preparations for use in industry and science; chemical preparations, chemical products and chemical auxiliaries for the textile industry, nonwoven industry and for textile recycling; chemicals and chemical preparations for water and wastewater treatment and purification; chemicals and chemical preparations for sludge treatment; wet strength chemical agents; flotation chemical agents; sizing preparations; bleaching preparations for industrial purposes; binding substances for industrial use; unprocessed artificial resins, unprocessed plastics; adhesives for use in industry; chemical polymers; anionic polymers; polyacrylamides.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Chemicals for use in industry and science; chemicals for use in industry, namely, chemicals for use in the textile industry, nonwoven industry and for textile recycling; chemicals and chemical preparations for water and wastewater treatment and purification, namely, water and waste water treatment chemicals for industrial use; chemicals and chemical preparations for sludge treatment, namely chemical reagents for non-medical purposes; wet strength chemical agents, being chemical agents for use in the manufacture of fabrics, textiles, and nonwoven fabrics; Flotation chemical agents, namely, surfactants for use in the manufacturing and recycling process of fabrics, textiles, and nonwoven fabrics; sizing preparations, namely, sizing compounds for use in the manufacture of fabrics, textiles, and nonwoven fabrics; bleaching preparations for industrial purposes; binding substances for industrial use, namely, chemical additives for use as binding agents in the manufacture of fabrics, textiles, and nonwoven fabrics; unprocessed artificial resins, unprocessed plastics; adhesives for use in industry; chemical polymers for use in the manufacture of fabrics, textiles, and nonwoven fabrics; polyacrylamides, namely, chemicals for use in industry
97.
FATTY ALCOHOL POLYGLYCOL ETHER FILTER AID FOR DEWATERING ORE CONCENTRATE
Filter aid compositions and processes for dewatering a slurry, optionally a mined ore slurry, are provided. The inventive filter aid comprises one or more branched or linear fatty alcohol polyglycol ethers having a number average molecular weight ranging from 500-2200 g/mol. The inventive method for dewatering a slurry results in increased filtration rate, increased dry solids content in the cake, and/or decreased water content in the cake compared to dewatering the slurry in the absence of the inventive filter aids.
09 - Scientific and electric apparatus and instruments
Goods & Services
Machines for mixing, dosing, ejecting and injecting process chemicals used in the liquid flows of papermaking and process industry.. Dosing apparatus, systems and instruments for supplying measured dosages of chemical fluids..
The invention relates to a surface size composition for surface sizing of paper, board, or the like. The composition comprises at least an aluminium compound and an anionic lignin-carbohydrate complex.
Stabilizers and methods for making stabilizers that include EXXSOLTMD40 Naphtha dearomatized fluid and/or EXXSOLTM D100 low aromatic hydrocarbon solvent, and impart acceptable filter ratios to inverted polymer solutions. Methods include contacting one or more monomers and an initiator, such as dimethyl 2,2'-azobis(2-methylpropionate), in a fluid, such as D40 Naphtha dearomatized fluid, for a time and at a temperature effective to form in the fluid a polymer of the one or more monomers. The one or more monomers may include stearylmethacrylate and methacrylic acid. Emulsions and inverted polymer solutions also are provided.
