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WO/2010/069151A1 |
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/2010/066026A1 |
Impregnating or spraying softwood chips in a solution containing an appropriate concentration of alkaline earth metal ions selected from the group consisting of calcium ions, barium ions and strontium, preferably calcium ions, at room te...
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WO/2010/053464A1 |
The invention relates to the cellulose paper industry. The method for producing a fibrous semifinished product from cellulose-containing materials consists in supplying starting raw material, conveying cooking liquor to the starting raw ...
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WO/2010/046532A1 |
The present invention relates to a process for the production of xylose and dissolving pulp from xylan-containing biomass, such as hardwood. The invention is based on prehydrolysis of the xylan-containing biomass with SO2 in specified co...
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WO/2009/140808A1 |
A process and system for pulping are provided, which are environmental protective, energy saving, circulating and green. The process comprises the following steps: cutting, dust exhausting, fibrillating, cooking and bleaching integration...
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WO/2009/136000A1 |
A process for the preparation of prehydrolyzed pulp in a digester from lignin-containing cellulosic material is disclosed. According to the present invention the cellulosic material is prehydrolyzed in a first steam phase at a first pres...
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WO/2009/134764A2 |
Methods of producing cellulosic or lignocellulosic materials for use in papermaking include treating a cellulosic or lignocellulosic dry feedstock having a first average molecular weight with ionizing radiation, and controlling the dose ...
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WO/2009/117402A2 |
Methods of pretreating comminuted cellulosic material with an acidic solution and then a carbonate-containing solution to produce a pretreated cellulosic material are provided. The pretreated material may then be further treated in a pul...
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WO/2009/105928A1 |
A process of joint production of fuel ethanol, electricity and paper pulp by fractionation conversion of Pennisetum purpureum Schum, which includes steam blasting the Pennisetum purpureum Schum segments with a steam blasting device, obta...
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WO/2009/108773A2 |
A system has been developed for pretreating cellulosic biomass feed stock including: a first pressurized reactor receiving the feed stock, wherein the feed stock undergoes hydrolysis in the first pressurized reactor; a sealing device hav...
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WO/2009/097878A1 |
The invention relates to an arrangement for adding, by means of at one feeding device (2, 3), at least one fluid into the flow of a pulp slurry (1) in a machine used for producing and/or refining a paper web, cardboard web, tissue web, o...
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WO/2009/097877A1 |
The invention relates to an arrangement and a method for diluting a pulp slurry (1) in a diluting device (11) and adding, by means of at least one respective feeding device (2, 3), several fluids into the flow of the pulp slurry (1) in a...
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WO/2009/094187A1 |
Isolated and/or purified polypeptides and nucleic acid sequences encoding polypeptides from Alicyclobacillus acidocaldarius and variations thereof are provided. Further provided are methods of at least partially degrading xylotriose and/...
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WO/2009/068525A1 |
The present invention relates to a method for utilizing a wood hydrolysate obtained from a hydrothermal treatment of a wood material method comprises the steps of providing a wood material, treating the wood material by means of an aqueo...
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WO/2008/138423A1 |
The invention relates to a method for reducing the heavy metal content of raw material containing lignocellulose prior to decomposition. The method is characterised in that the raw material is washed with an aqueous solution of a complex...
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WO/2008/138109A1 |
Using site-directed mutagenesis to mutate the Xanthomonas campestris pectate lyase gene, variants of Xanthomonas campestris pectate lyase with improved thermostability and/or enzymatic activity have been expressed in Escherichia coli, an...
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WO/2008/088077A1 |
The object is to produce a pulp without employing sodium sulfide or high temperature/high pressure conditions and with higher yield compared to a Kraft method and to collect lignin. A pulp is produced by hydrophilizing a wood chip with a...
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WO/2008/074220A1 |
A preparation method of a bamboo pulp comprises the steps of preparing material, cooking and bleaching. In the step of preparing material, bamboo material is obliquely cut at the angle of 10-85ºinto bamboo chip with a chip cross-section...
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WO/2008/048426A2 |
A method of producing a modified pulp comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips; and subjecting said treated wood chips to chemical or semichemical pulping to form a modified...
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WO/2008/026932A1 |
It is described a method for thermal enzymatic hydrolysis of ligno cellulose, which method comprises the following steps: lead a raw material based on ligno cellulose (1), pH-adjusting and other additives (19) and possibly thinner liquid...
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WO/2008/028183A1 |
The present invention provides a method for producing an MDF board from pulp from a fibrous lignocellulose material using a treatment or pretreatment step which exposes the material to oxalic acid or oxalic acid derivatives (particularly...
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WO/2007/090926A1 |
An improved method for treating lignocellulosic material, including a prehydrolysis-mass transfer process, which produces a concentrated hydrolysate volume during the time required for the hydrolysis itself. The improved process comprise...
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WO/2007/090925A1 |
An improved method for treating lignocellulosic material, including a prehydrolysis-mass transfer process, which produces a concentrated hydrolysate volume following steam hydrolysis. The improved process comprises the heating of the dig...
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WO/2007/073333A1 |
The invention concerns a system and a method for the generation of steam in a digester plant for the production of chemical cellulose pulp. The pressure of hot, pressurised black liquor from a digester (4) is reduced in a first step (11 ...
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WO/2007/071187A1 |
A method for making paper pulp from straw, which utilizes the acute reaction of hydrogen peroxide and alkali substance and the heat energy released from it to make paper pulp. The method comprises the following steps: crushing wheat, ric...
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WO/2007/064296A1 |
The invention concerns a system for the steam pre-treatment of chips in association with the production of chemical cellulose pulp. The vessel (1) in which the chips are pre-treated with steam (ST) is provided with a ventilation channel ...
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WO/2007/063171A1 |
A method of producing a chemi-mechanical pulp from a raw material comprising wood chips. According to the method, first, the wood raw material is steamed at an elevated temperature to remove air from the wood chips, then, at the impregna...
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WO/2007/033091A2 |
Surfactant penetrant treating solutions and their use in the manufacture of paper products. The surfactant penetrant treating solutions include two types. The first type is an enzymatic surfactant penetrant treating solution, and the sec...
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WO/2006/128304A1 |
A continuous process for treating a lignocellulosic feedstock is provided. This method comprises pretreating the lignocellulosic feedstock under pressure in a pretreatment reactor at a pH between about 0.4 and about 2.0. One or more than...
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WO/2006/127880A2 |
A method of producing a modified pulp for use in paper or paper web products, the method comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips; and subjecting said treated wood chips to ...
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WO/2006/111604A1 |
The objective of this invention is a method for separating cellulosic fibres, hemicellulose and lignin from parts of plants containing these, such as stems, leaves and seed coats or hulls of cereal, oilseed, fibre or grassy plants. After...
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WO/2006/103317A1 |
The invention relates to an improved process to break down lignin macromolecules and liberating cellulose fibers in lignocellulosic material using delignifying reactants with a gaseous organic agent as a heating and reaction-accelerating...
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WO/2006/053948A1 |
A method and an apparatus for processing wood chips, wherein the wood chips are treated with steam in a gas removal apparatus (2). The condensate formed in the gas removal apparatus (2) is removed from the gas removal apparatus (2) and t...
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WO/2006/053939A1 |
The present invention describes a new method and associated devices for the fabrication of pulp from wood, and other cellulose containing natural materials. The fabrication is fast, environmentally friendly, and economical. Process can b...
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WO/2006/037858A1 |
A method and an apparatus for preparing cellulose pulp, in which a lignin-containing raw material is impregnated with impregnation liquor and the impregnated raw material is cooked. The black liquor obtained by cooking is concentrated in...
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WO/2006/037857A1 |
A method and a device for preparing cellulose pulp, in which a lignin-containing raw material chopped into pieces, is impregnated with an alkaline, polysulfide-containing impregnation liquor and the thus impregnated lignin-containing raw...
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WO/2006/037860A1 |
A process and an apparatus for producing pulp from lignocellulosic material by an alkaline cooking process, in which process preheated chips are treated in an impregnation stage with impregnation liquor, which is taken from the impregnat...
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WO/2006/021618A1 |
The invention relates to a method for adjusting the fibrous properties of chemical, mechanical or chemi-mechanical pulp, for adjusting the uniformity of the properties and for decreasing any variation in quality. According to the method,...
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WO/2006/006934A1 |
The invention concerns a method for the impregnation of chips during the manufacture of chemical pulp, where the chips are continuously fed without preceding steam treatment to the top of an impregnation vessel (101) that maintains atmos...
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WO/2006/001758A1 |
A method and an arrangement for the impregnation of untreated chips during the manufacture of chemical pulp. The untreated chips are fed without preceding steam treatment into an impregnation vessel (10) that comprises an upper part (11)...
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WO/2005/118923A1 |
The invention relates to the use of a chemical conversion pulp that is produced by methods including an acidic bisulfite pulping method and at least one cold alkali refining step and one hot alkali refining step of the chemical pulp, for...
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WO/2005/106110A1 |
A method of producing hardwood pulp is provided. This method comprises treating hardwood chips with one or more than one Family 11 xylanase enzyme in the absence of adding an oxidizing enzyme for about 5 minutes to about 120 minutes, to ...
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WO/2005/106111A1 |
A method and a device (1) for removing gas from wood chips, wherein the wood chips flowing downwards are heated with a steam flow that is cross-directional in relation to the wood chip flow. Preferably, steam is fed (11, 12, 15, 20) to t...
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WO/2005/106112A1 |
The present invention concerns a method and an apparatus for removing gas from comminuted lignocellulose material, wherein material is heated with steam into a degasification temperature and the heated material flow is led as a dense com...
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WO/2005/103371A1 |
A process of making bamboo pulp for producing cellulose diacetate is disclosed. The process includes stock preparation, pre-hydrolyzing, digesting, beating, alkali treatment, bleaching, drying, etc. The present process may also used for ...
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WO/2005/103135A1 |
Mechanical or Chemical pulp is treated with about 0.01 weight % to about 5 weight % of a Mixture. The Mixture is water; diethylenetriaminepentakis (methyl) phosphonic acid or its known salts; polyacrylic acid or its known salts; and opti...
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WO/2005/068709A1 |
A method of de-inking cellulosic fibrous materials comprising: 1) admixing an alkaline reagent with hydrogen peroxide and an aqueous suspension of inked cellulosic fibrous material in amounts whereby the alkaline reagent and hydrogen per...
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WO/2005/064074A2 |
The invention relates to a method for removing an extractive during the production of mechanical pulp, the method comprising a step for impregnating chopped ligno-cellulosic material intended for use in pulp production before mechanical ...
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WO/2005/064075A1 |
According to the invention, polysulfide is used in the manufacture of kraft pulp in the initial stage of a displacement batch process in order to improve the yield. Polysulfide-containing white liquor is added intermixed with the first l...
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WO/2005/062892A2 |
An eductor for mixing liquids and solid particles includes a nozzle, an initial mixing chamber, a first diffuser, an intermediate mixing chamber and a second diffuser. The nozzle includes a semicircular nozzle outlet that is offset from ...
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