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WO/2013/082735A1 |
A sectional pulping process for extracting fiber from plant materials by using a chemical mechanical pulping method comprises: fully soaking the material in black liquor of low-concentration NaOH solution, KOH solution, limewater or with...
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WO/2013/070130A1 |
The present invention relates to a method for separation of lignin from original black liquor (BLIN) comprising the following phases in sequence; a first precipitation phase (PR1 ) for precipitation of lignin by a first acidification of ...
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WO/2013/068453A2 |
The present invention relates to a process for producing substantially pure hydrogen sulphide (H2S). The present invention also relates to a process for producing a new pre-treatment mixture, which is to be used in a pre-treatment step b...
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WO/2013/066225A1 |
The invention relates to a method for preparation of white liquor in a chemical recovery process of the kraft process. According to the invention, the green liquor separation process and the white liquor separation process taking are pla...
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WO/2013/040747A1 |
Disclosed in the present invention is a method for comprehensively utilizing solid waste during soda recovery in papermaking industry. The method comprises steps: removing ferrous ion in green liquor, in which step, a basic hydroxide is ...
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WO/2013/036190A1 |
A process for treating a hardwood black liquor from the manufacturing of hardwood pulp in order to precipitate calcium compounds present in the liquor wherein the process comprises the steps of; providing a hardwood black liquor from the...
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WO/2012/173566A9 |
A reactor for gasification of feedstocks for gasification, adapted to handle feedstocks for gasification comprising organic and inorganic compounds, wherein said compounds during gasification in the presence of oxygen and/or air at a gas...
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WO/2013/003941A1 |
The present invention relates generally to a process for the recovery of lignin from black liquor. The process involves electrochemically treating the black liquor to reduce the pH thereof below about 11, precipitating the lignin from th...
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WO/2013/002687A1 |
The present invention relates to a method for separation of lignin from original black liquor (BLIN) comprising a first precipitation phase (PR1/PR2) for precipitation of lignin by a first acidification using acidifier, CO2, at alkaline ...
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WO/2013/002708A1 |
A method for producing a purified lignin product by an enzymatic treatment, the method comprising the steps: providing a mixture comprising lignin adjusting and/or maintaining a pH value of said mixture to an optimum value for the enzyma...
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WO/2012/177198A1 |
The present invention relates to a method for separation of lignin from original black liquor (BLIN) comprising the following phases in sequence; a first precipitation phase (PR1) for precipitation of lignin by a first acidification of t...
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WO/2012/175796A1 |
A method for making pulp (200) and crude biofuel (310) from screened chips (108) of wood. The method comprises producing pulp (200) and black liquor (220) from the screened chips (108) in a pulp production process, and evaporating water ...
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WO/2012/174094A1 |
A sulfidable catalyst containing at least one metal or metal oxide is sulfided under aqueous conditions.
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WO/2012/161865A1 |
A process for recovery of lignin from black liquor that contains either soluble or dispersed lignin by generating a "liquid lignin" at high yield is disclosed. Soluble lignin at a high pH is precipitated by reducing the pH of the black l...
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WO/2012/150899A1 |
Process for gasification of an alkali containing energy rich aqueous solution (120) from a pulp mill in an entrained flow gasification reactor (2), the process comprising the steps of d) Supplying said alkali containing energy rich aqueo...
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WO/2012/147094A1 |
A method for extraction of black liquor from a horizontal tube continuous digester (8,9) is disclosed. The method comprises of passing a mixture of pulp and black liquor from the horizontal tube continuous digester (8,9) through a screw ...
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WO/2012/123644A1 |
The present invention relates to producing chemicals and biofuels from wood material, e.g. mixed forest biomass. Specifically, the invention concerns a process for conditioning spent liquor produced by SO2 -ethanol-water (SEW) fractionat...
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WO/2012/117161A1 |
A method of treating waste liquors which comprise organic compounds, in order to recover chemical compounds or to recycle chemicals. In the present method, the sodium-based waste liquor, which comprises organic compounds that are sourced...
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WO/2012/104492A1 |
The invention relates to a method for making dimethyl sulfone. According to the invention, dimethyl sulfone is manufactured by oxidation from dimethyl sulfide in a methanol-based medium. Methanol is removed during and/or after the oxidat...
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WO/2012/104491A1 |
The invention relates to a method for making purified methanol from a liquefied fraction obtained from a sulfate pulp process and containing methanol and sulfur contaminants, its main sulfur contaminants being methyl mercaptan, dimethyl ...
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WO/2012/091906A2 |
One exemplary embodiment can be a process for reducing one or more insoluble solids in a black liquor. The process may include hydrothermal processing the black liquor to a temperature of 250 - less than 300° C for an effective time to ...
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WO/2012/088619A1 |
The invention relates to a process for producing tall oil by reacting tall oil soap with a sodium sesquisulfate solution. The process includes the following steps: (a) determining the concentration of sodium sequisulfate; (b) reacting th...
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WO/2012/062353A1 |
The method is used to process waste water (4) arising during the production of lignocellulosic fibrous materials. Said method comprises an electrochemical treatment (6) for separating cations contained in the waste water (4), and a fract...
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WO/2012/059133A1 |
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/2012/052619A1 |
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/2012/054797A1 |
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/2012/049375A1 |
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/2012/022949A1 |
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/2012/014213A1 |
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/2012/005677A1 |
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/2011/162420A1 |
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/2011/138633A1 |
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/2011/131144A1 |
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/2011/123034A1 |
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/2011/117484A2 |
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/2011/113329A1 |
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/2011/110746A1 |
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/2011/102761A1 |
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/2011/098166A1 |
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/2011/098165A1 |
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/2011/098167A1 |
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/2011/081587A1 |
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/2011/078749A1 |
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/2011/064447A1 |
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/2011/061018A1 |
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/2011/057293A1 |
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/2011/055010A1 |
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/2011/044320A1 |
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/2011/037967A2 |
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/2011/027029A1 |
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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