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Matches 551 - 600 out of 2,216

Document Document Title
WO/1997/000997A1
The present invention relates to a method of and an apparatus for treating pulp in connection with digesting. The cellulosic material is digested to a kappa number of below 50, the digested pulp is taken at a consistency of 5 - 20 % to i...  
WO/1997/001074A1
The present invention relates to a method and apparatus for treating material which conducts heat poorly, in which method the material is fed to a flowing channel of an indirect heat exchanger, in which channel the average velocity of th...  
WO/1997/000998A1
The present invention relates to a method of treating pulp and an apparatus applying the method. The method and the apparatus according to the invention are especially suitable for the bleaching of medium consistency pulp when bleaching ...  
WO/1996/041915A1
The efficiency by which pulp cooking liquor components penetrate the wood and enable lignin and resins to be removed from the cellulosic materials is increased by contacting wood chips and the like with a liquid mixture comprised of whit...  
WO/1996/041052A1
A method and apparatus for producing pulp (95) from fibrous plant materials (10). The method comprises the step of pulping (100) the fibrous material with a cooking solvent of a lower aliphatic alcohol and an additive mixture comprising ...  
WO/1996/035013A1
The invention concerns a method of producing a pulp of cellulosic material, wherein the material is mixed with formic acid as solvent, boiled at approximately the boiling temperature of the solvent and reflux cooled. Annual plants and wo...  
WO/1996/034143A1
The present invention relates to a method for continuous cooking of kraft pulp in a single-vessel system (1), preferably a single-vessel hydraulic digester, with chips being conveyed from a high-pressure feeder (2) in a transfer line (2A...  
WO/1996/033309A1
A method for making lignocellulose fibers, which may be optionally coated with a suitable thermoplastic, wherein the starting materials may be chosen from a wide variety of generally non-recyclable contaminated wood, paper, and/or plasti...  
WO/1996/033308A1
This invention relates to an environmentally preferred process for the delignification of a cellulosic biomass. The process uses the oxidative properties of nascent oxygen to complete pulping and bleaching operations. The process may be ...  
WO1996029465A3  
WO/1996/029465A2
It has already been proposed to use measuring devices to detect spectral and/or physical characteristics with a subsequent neuronal network in the production of de-inked cellulose, whereby corrections for an existing regulating or contro...  
WO/1996/025553A1
The invention relates to a method and an equipment for the processing of lignocellulose materials by continuous pressure hydrolysis, optionally in the presence of inorganic acid, by consequent expansion and separation of the hydrolysate ...  
WO1996018770A3  
WO/1996/023568A1
The invention concerns the use of alkoxylation products of epoxidized fats of which the rings are opened by nucleophiles as antifoaming agents in aqueous systems.  
WO/1996/018770A2
The present invention concerns a multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances, and a method of using this system. The multicomponent system is characterized in th...  
WO/1996/015312A1
In a process for extracting cellulose from fibrous materials such as wood, the fibrous materials are reacted with a chemical disintegration solution in the presence of organosilicic compounds.  
WO/1996/015313A1
The present invention relates to a method for continuously cooking kraft pulp in a single-vessel system (1), preferably a single-vessel hydraulic digester, with chips (2) being fed in at a first end (3) of the digester (1), white liquor ...  
WO/1996/011733A1
A defoamer composition made from the reaction product of an epoxide containing composition selected from epoxide fatty acids, epoxide vegetable oils and mixtures thereof and at least one secondary compound selected from the group consist...  
WO1996006935A3  
WO/1996/009432A1
A method and apparatus for the continuous production of cellulosic pulp for use in a papermaking process. The apparatus includes a vessel (1) containing a pulping liquor and the vessel consists of a first impregnation zone (2) and a seco...  
WO/1996/007787A1
A method and continuous digester system provide for a high Na2S concentration in the beginning of the cooking of comminuted cellulosic fibrous material to produce cellulose pulp, providing a more selective cooking and potential to lower ...  
WO/1996/007786A1
A method and continuous digester system provide for a high Na2S concentration in the beginning of the cook of comminuted cellulosic fibrous material to produce cellulose pulp, providing a more selective cook and potential to lower cookin...  
WO/1996/006935A2
Methods and expression constructs are provided for the cloning and overexpression of an arabinoxylan degrading enzyme of fungal origin in a selected microbial host cell. The enzyme is shown to be active in the degradation of water-insolu...  
WO/1996/006974A1
The present inventon relates to a sulphite fusion process for the production of celluloses using alkaline monosulphite solutions, organic solvents and quinone derivatives. The raw material to be fused is treated in a special impregnation...  
WO/1996/006217A1
The sulfide ion concentration and sulfidity of kraft cooking liquor during kraft cooking of cellulose pulp is selectively increased. After treatment in a first treatment zone in which impregnation or kraft cooking takes place using a kra...  
WO/1996/002698A1
A method for the production of kraft pulps in a digester, by modifying the cooking chemical concentration, and lignin concentrationprofiles during the cook, has provided extended delignification and improved selectivity in a simpler way ...  
WO/1995/034712A1
A chip feeding system for a continuous digester provides for a greater rate of delivery of chip slurry to the digester, and is much less expensive than conventional chip feeding systems, typically being only 40-50 % of the height of the ...  
WO/1995/032331A1
Method of stepwise delignification of lignocellulose fiber material by digestion with sulphidic alkaline liquor comprising kraft cooking of wood chips with white liquor. White liquor is distributed during digestion. Ex-digestion liquor i...  
WO/1995/029288A1
An aqueous anthraquinone dispersion utilizable as a pulp digestion aid is produced by dispersing an anthraquinone in water in the presence of a rosin treated with a polyvalent metal to improve the dispersibility of the anthraquinone and ...  
WO/1995/027099A1
This method is a predigestion step (A) for spray-depositing a high-temperature digestion chemical liquid on a raw material for pulp fed into a predigestion hopper (12) while recovering residual digestion chemical liquid immediately, and ...  
WO/1995/026438A1
A method for oxidative degradation of lignin and polysaccharide fragments dissolved during polyoxometalate delignification or bleaching of wood pulp, wood fiber or pulp or fiber obtained from a non-woody plant. The method comprises the s...  
WO/1995/023891A1
A method for improving pulp brightness utilizes a combination of a distributed total white liquor charge during the warm fill, hot fill and cooking stages of a batch cooking process and low cooking temperatures during the cooking stage. ...  
WO/1995/023256A1
Disclosed is a method for improving the kraft pulping and chemical recovery processes. In the method non-traditional pulping chemicals are generated on site and used in addition to the traditional pulping chemicals. The additional active...  
WO/1995/023257A1
The present invention relates to a process for continuous cooking of chemical pulp, in which the chips are fed into a chip chute (3), which is arranged on top of a high pressure feeder (4) for passing the chips into a downstream, pressur...  
WO/1995/021959A1
A delignification process suitable for fertilization and for the processing of a field plant material consists of (a) the heating of a raw material comprising cellulose fiber and lignin for 30-420 min at a temperature of 100-160 �C tog...  
WO/1995/021960A1
The invention relates to an enhanced process for integrating production of agro-fibres in field plant energy production. The process involves separating the cellulose fibres from lignin, comprising (a) heating a raw material containing c...  
WO/1995/021961A1
The present invention relates to a method for optimizing the liquor-to-wood ratio, especially in a pre-impregnation vessel and a continuous digester, when producing chemical pulp. The method is based on a transfer circulation with the ai...  
WO/1995/020065A1
Process for preparing pulp from ligning-containing cellulosic material are disclosed including a prehydrolysis step followed by neutralizing hydrolysate and the prehydrolyzed cellulosic material in the reactor with alkaline neutralizing ...  
WO/1995/020066A1
An improved absorbency material for absorbency applications comprised of a cellulosic fibrous material wherein said cellulosic fibrous material such as pulp is a cold alkali solution treated material at a treatment temperature of less th...  
WO/1995/018260A1
A process for the preparation of free sugars, lignin, lignin by-products, and cellulose pulp using recyclable solvents which have lower critical solution temperatures.  
WO/1995/018261A1
The present invention relates to a method and a device for continuously producing pulp in which finely divided fibre material, preferably wood chips, is impregnated in a first vessel (1), preferably by being fed in at the top (2) and fed...  
WO/1995/013419A1
Digester systems for producing paper pulp from comminuted cellulosic fibrous material take into account the level of dissolved organic materials (DOM), such as lignin, hemi-cellulose, and cellulose, maintaining the DOM level at about 100...  
WO/1995/012708A1
Paper pulp and paper products, and methods of making same, of fibers from reclaimed 100 % cotton denim scrap material from the manufacture of clothing and the like, some of which fibers may retain the dye of the reclaimed material and al...  
WO1994029425A3  
WO/1995/000698A1
During the production of kraft pulp, by kraft cooking, one or more hemicellulose-rich extractions are treated to separate and remove a significant portion of the hemicellulose. This may be accomplished by treating the extraction with an ...  
WO/1994/029510A1
The present invention pertains to a process for modifying, breaking down or bleaching lignin, material containing lignin or like substances using oxidation catalysts and suitable oxidizing agents wherein these catalysts are used in combi...  
WO/1994/029425A2
A multicomponent system for use in detergent substances consists of oxidation catalysts and suitable oxidizing agents and aliphatic, cycloaliphatic, heterocyclic or aromatic compounds containing NO, NOH or (A).  
WO/1994/028236A1
A process for the production of a waste-based cellulosic pulp useful for the manufacture of paper and paperboard whether used in admixture with virgin pulp or as the sole pulp component, comprising the steps: a) digesting a waste cellulo...  
WO/1994/025137A1
The invention concerns aqueous anti-foaming agent dispersions whose dispersed phase contains fatty alcohols, ketones and, optionally, naturally occurring and/or synthetic waxes with particular metling points. The preferred application of...  
WO/1994/025668A1
Kraft pulp of increased strength and bleachability may be produced with decreased consumption of effective alkali, and at a lower H factor, by keeping the dissolved organic material (DOM) concentration low substantially through the entir...  

Matches 551 - 600 out of 2,216