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WO/2012/059133 |
The method is used to recover chemicals, e.g., from wastewater (1) produced in the production of pulp. The wastewater (1) is conducted between ion-selective walls (3, 3'), and at the same time electric current flows through the wastewate...
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WO/2012/052619 |
The present invention relates to a method and arrangement for separating contaminants from liquids, such as condensates, or vapors at an evaporation plant. Contaminants are separated from liquids by stripping when bringing a contaminant-...
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WO/2012/054797 |
A method to pretreat hydrolyzate with biological organisms including: storing the hydrolyzate for an extended period for initial pretreatment; adding a dilution liquid and nutrients to the hydrolyzate as the hydrolyzate is transferred fr...
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WO/2012/049375 |
In a method for the continuous precipitation of lignin from black liquor black liquor is provided so as to flow as a pressurized flow in a reactor (2) with a dwell time of less than 300s, - an acidifying agent selected from the group of ...
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WO/2012/022949 |
The invention provides methods and apparatus for thermal treatment, e.g. for pyrolysis of lignin. The lignin is provided to a reaction chamber as a paste, which can reduce or avoid process difficulties encountered when heating lignin.
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WO/2012/014213 |
A process is disclosed for recovering pure cellulose from a cellulose-containing sludge, the process comprising treating a sludge cellulose source under conditions permitting dissolution of non-cellulose material and suspension of the ce...
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WO/2012/005677 |
The present invention relates to a process tor the production of precipitated lignin from black liquor wherein the process comprises the steps of; providing a black liquor stream, treating the black, liquor at an increased temperature an...
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WO/2011/162420 |
Lignin is recovered with high efficiency at an essentially neutral pH range from strongly alkaline spent pulp cooking liquor (that is, black liquor) that is generated from kraft pulp production processes. The disclosed method comprises a...
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WO/2011/138633 |
A method for pulp processing includes a cold caustic extraction stage in which the spent cold caustic solution and the spent liquid used to wash the extracted pulp are concentrated by an evaporation system. The concentrated liquid can be...
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WO/2011/131144 |
Disclosed is a mixed fuel containing organic matters from paper pulp waste water or waste liquid, especially acidic lignin and fuel. Through acidizing process, hydrophobicity of the lignin is increased and viscosity reduced to reach the ...
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WO/2011/123034 |
Method for recovering chemicals and energy from sulphite thick liquor, said sulphite thick liquor being obtained when producing pulp by chemical delignification of fibrous raw material using a sulphite pulping process, said sulphite thic...
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WO/2011/117484 |
The present invention relates to the field of thermoplastics, the synthesis thereof and the use thereof. It describes in particular the integration of light ash resulting from the combustion of waste from the paper-making industry into t...
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WO/2011/119423 |
A process for making bleached pulp comprises contacting an unbleached pulp mixture with a first recycled filtrate obtained from a first location (3) of a first recycled filtrate loop, to obtain a first pulp mixture having a first consist...
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WO/2011/113329 |
A circular utilization method of straw in a pulping and papermaking processes comprises the following steps of: obtaining straw raw material for pulping and its waste through stock preparation; obtaining primary pulp by digesting the str...
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WO/2011/110746 |
A method for producing pulp is disclosed. More particularly, the invention concerns a displacement batch cooking process comprising a steam-phase prehydrolysis step, wherein the recovery of the by-products is improved. In the recovery st...
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WO/2011/102761 |
The invention relates to a method and apparatus for reducing the formation of incrustations during concentration of black liquor in a multiple-effect (1A-1B-1C) evaporation process. When the solubility level of salts in the black liquor ...
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WO/2011/098166 |
The invention relates to a wastewater purifying system for purifying wastewater (1) of a machine for producing and/or finishing a paper, cardboard, tissue, or other fibrous material web, comprising at least one biological purification st...
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WO/2011/098167 |
The invention relates to a wastewater purifying system for purifying wastewater (1) of a machine for producing a paper, cardboard, tissue, or other fibrous material web (2), said machine having at least one press section (8) for dewateri...
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WO/2011/098165 |
The invention relates to a wastewater purifying system for purifying wastewater (1) which accumulates in a dewatering device (7) for dewatering a fibrous material suspension (2) that is suitable for producing a paper, cardboard, tissue, ...
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WO/2011/084761 |
A reactor for the treatment of lignocellulosic material and related methods. The reactor includes a vessel having an upper portion and a lower portion. A pressure envelope is formed between an outer wail of the vessel and at least one lo...
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WO/2011/081587 |
This invention concerns a continuous method and an arrangement for separation of crude tall oil (CTO) from black liquor. The method involves an initial separation within a tank and/or within a centrifugal separator, and processing of the...
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WO/2011/078749 |
The invention relates to a system and method for washing and thickening a lime mud slurry. A filter 1 is used wherein the liquid volume in the filter vat is divided by at least one partition wall 19 into at least 2 independent vat parts ...
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WO/2011/064447 |
The present invention relates to a method of treating and utilizing liquid flows at a chemical pulp mill. The method comprises at least the following stages: a) chemical pulp is produced in an alkaline cooking process, b) the brown stock...
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WO/2011/061018 |
The invention relates to a method for the oxidative bleaching of discolored waste water by means of a bleaching agent. According to the invention, the expense of the chemicals used is reduced by water soluble silicate being added to the ...
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WO/2011/055010 |
The invention relates to a method and equipment for treating pulp mill black liquor so as to recover the energy in chemicals therein. In the invention the black liquor is pyrolysed in a pyrolysis reactor (4), where causticizing material ...
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WO/2011/057293 |
The invention includes a process for recovering the liquids used in pretreatment of biomass for production of biofuels and other biomass based products. Liquid recovery and purification minimizes waste production and enhances process pro...
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WO/2011/044320 |
A method for the production of alcohol and other bioproducts from power boiler woody biomass extract containing hemicelluloses, with or without combining extract from wood prior to Kraft cooking. The process is integrated with the host K...
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WO/2011/037967 |
There is provided a process for recovery of lignin from a black liquor that contains either soluble or dispersed lignin, generating a "liquid lignin" at high yield. Soluble lignin at elevated pH is precipitated by reducing the pH of the ...
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WO/2011/037967 |
There is provided a process for recovery of lignin from a black liquor that contains either soluble or dispersed lignin, generating a "liquid lignin" at high yield. Soluble lignin at elevated pH is precipitated by reducing the pH of the ...
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WO/2011/027029 |
An object of the present invention is a method of and an apparatus for processing cellulose pulp of wood processing industry. Especially, objects of the method and assembly of the invention are, on one hand, the use a pressure diffuser f...
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WO/2011/020949 |
A method of producing sodium hydroxide from the waste water stream of the production process of fibre pulp, which stream comprises organic waste and sodium bound to it. According to the present method, the waste water stream is concentra...
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WO/2011/017797 |
During nanocrystalline cellulose (NCC) production, a considerable amount of sulphuric acid is used. After the separation of the NCC, the remaining solution contains sugars and residual sulphuric acid. The sugars are in the monomeric and ...
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WO/2011/004855 |
Provided is a technique for improving the causticizing process in pulp production. A high-quality calcium carbonate can be produced efficiently by adding fired shells and a green liquor and by inducing a causticizing reaction during the ...
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WO/2011/002354 |
The invention relates to a process for purifying recovery boiler electrostatic precipitator ash (via 19) from chlorides (Cl) and potassium (K), and recover useful pulping chemicals such sodium sulphate (Na2SO4). The inventive process use...
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WO/2010/142146 |
A process for producing high-strength corrugated base paper comprises the following five steps: (1) preparing a pulp;(2) kneading the pulp, in which the pulp concentration is ≥30%, the motor current of the kneader is controlled in the ...
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WO/2010/143997 |
The present invention relates to a method for separation of lignin from original black liquor comprising the following steps in sequence: a) Precipitation of lignin by a first acidification stage of the original black liquor, b) followed...
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WO/2010/131184 |
The invention relates to a method for obtaining tetracosanol from a complex mixture derived from tall oil pitch, containing terpenoids, rosin alcohols, rosin aldehydes, aliphatic alcohols, hydrocarbons and stilbene derivatives. The metho...
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WO/2010/114468 |
Green liquor clarification comprising filtering of a flowing suspension containing solids, wherein the suspension is brought into contact with a first filter unit (4), said 5 filter unit (4) comprising one or several filter elements (12)...
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WO/2010/106077 |
A method for inhibiting the formation, deposition and adherence of calcium salt scale to metallic and other surfaces in the equipment, vessels and/or piping of a chemical pulp process facility comprising adding an effective scale inhibit...
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WO/2010/104458 |
There is disclosed a process for the manufacturing of shaped cellulose materials from lignocellulose wherein a dissolving grade pulp is manufactured and dissolved in an aqueous alkaline or acidic solvent system forming a solution suitabl...
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WO/2010/091492 |
The invention relates to a method and apparatus to recover and purify methanol from gases produced in the digester during the kraft pulping process. The gas is typically recovered as a foul gas (called stripper off gas or SOG) comprising...
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WO/2010/092430 |
A method and a system for optimization of parameters for a recovery boiler in a pulp mill is provided. The method is based on use of a first principle mathematical model to estimate parameters that are otherwise not measurable to accurat...
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WO/2010/093495 |
An adjustable fuel nozzle assembly [1000] for spraying fuel into a recovery boiler [13] includes at least two fuel nozzle assemblies [1100, 1300]. An adjustment section [1500] adapted to adjust the relative orientation between the nozzle...
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WO/2010/069151 |
A multi-stage process for extracting cellulose from plant comprises the following steps: firstly impregnating the plant with dilute alkali; steaming under increased pressure and then beating and washing the pulp, and thus obtaining cellu...
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WO/2010/063875 |
The invention is related to a method for emptying a furnace floor from smelt in a black liquor recovery boiler when the black liquor recovery boiler is being shut down. The emptying can be started while smelt is still flowing in smelt sp...
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WO/2010/059825 |
Sugar solutions are obtained from polysaccharide enriched biomass by contacting biomass with water and at least one nucleophilic base to produce a polysaccharide enriched biomass comprising a solid fraction and a liquid fraction. The sol...
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WO/2010/026244 |
The present invention relates to an integrated method for producing cellulose and at least one low-molecular-weight reusable material, in which a starting material containing lignocellulose is provided and subjected to a decomposition wi...
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WO/2010/020729 |
One subject of the invention is a dimethyl disulphide in which the content of biocarbon is at least 1%. Another subject of the invention is processes for preparing this dimethyl disulphide. Yet another subject of the invention is the use...
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WO/2010/020583 |
The instant invention relates to an improved bleach process in the presence of a metal complex catalyst, hydrogen peroxide or a precursor of hydrogen peroxide and a carboxylic acid anhydride. Further aspects of the invention are the use ...
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WO/2010/019079 |
The invention relates to a method and system of reducing the content of hazardous chemicals when handling malodorous gases emanating from a pulp mill and before burning said malodorous gases in final incineration equipment in oxygen exce...
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