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Matches 451 - 500 out of 1,000

Document Document Title
WO/1999/007936
A method of treating wood chips allows chemical pulp (e.g. kraft pulp) to be produced having enhanced fiber strength properties. In a first zone or stage the chips are cool impregnated (e.g. at a temperature of about 60-120 °C) with a f...  
WO/1998/059107
A method in connection with the pretreatment of comminuted fibrous material intended for chemical cellulose pulp production, wherein said comminuted fibrous material is fed through a low pressure system comprising a gas phase part follow...  
WO/1998/058119
The invention concerns a method for the continuous preparation of paper pulp from a raw material consisting of lignocellulose textile fibres, consisting in cutting the textile fibres, separating the textile fibres from foreign bodies, ca...  
WO/1998/056979
A method for continuous cooking of kraft pulp in a single-vessel system (1), with chips and liquor being conveyed from a high-pressure feeder (2) in a transfer line (2A) to a first end (3) of the digester (1), a part of said liquor being...  
WO/1998/056978
A method for use in a batch digesting process is provided which includes the removal (76, 92) of a portion of the hot cooking liquor from the digester (10) prior to the cook creating a liquid-vapor interface (90) in the digester followed...  
WO/1998/056981
Disclosed are modified cellulosic fibers having a dry zero span tensile index that is substantially less than the dry zero span tensile index of the corresponding unmodified cellulosic fibers. Fibers having reduced dry zero span tensile ...  
WO/1998/056980
An apparatus and method for use in a displacement batch digesting process is provided which reduces the amount of equipment required to carry out an efficient displacement batch digestion process. According to the invention, at least one...  
WO/1998/049390
The present innovation consists of the use of a reagent solution (FINAL COOKING ACID) where ammonium magnesium bisulphite is the active chemical. This new process is particularly useful to those industrial plants where the cellulose pulp...  
WO/1998/036124
A process for treating a cellulose-containing substance (20) includes bringing the cellulose-containing material (20), in particulate form, into contact with an aqueous liquid (19), and thereafter subjecting the cellulose-containing subs...  
WO/1998/035090
This invention relates to a new and improved way of continuously cooking fibre material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order...  
WO/1998/035091
This invention relates to a new and improved way of continuously cooking fibre material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order...  
WO/1998/033970
A process is disclosed for producing fibrous materials for the manufacture of cellulose, paper or wood materials by using at least one dicarboxylic acid dialkyl ester and/or a copolymer of polyester-polyether and/or fatty acid polyol mon...  
WO/1998/032912
The present invention relates to a method and apparatus for cooking pulp. Especially, preferably, the invention relates to an alkaline batch cooking process, i.e. to a so-called Batch process. In the method and apparatus for cooking pulp...  
WO/1998/032913
The invention concerns a method for making chemical paper pulp comprising: a) a step of kraft cooking lignocellulose materials with anthraquinone (AQ) for reducing the amount of hexeuronic acids in the paper pulp to a minimum; b) a step ...  
WO/1998/031871
The invention concerns a method for fractionating cereal straw, in particular wheat and barley which consists in contacting the straws with an aqueous basic solution, then subjecting the resulting mixture simultaneously to compression an...  
WO/1998/020198
The invention relates to a method of producing pulp with a high brightness using single-stage cooking with formic acid, washing with performic acid and bleaching with oxidizing bleaching chemicals. In performic acid washing, the rapid fo...  
WO/1998/017857
A procedure in the manufacture of lignocellulose to remove non-process elements in the form of incrust forming alkaline earth metals and other metals and transition metals is described, the extraction with a combination of an organophili...  
WO/1998/015687
Low temperature steaming and slurrying of wood chips results in significant improvement in treatment, the chips being maintained at a temperature below 110 �C (more desirably at about 105 �C or less, and most desirably at about 100 ...  
WO/1998/014270
A multi-function process is described for the hydrolysis and fractionation of lignocellulosic biomass to separate hemicellulosic sugars from other biomass components such as extractives and proteins; a portion of the solubilized lignin; ...  
WO/1998/013547
The invention relates to a process for producing chemical pulp from comminuted cellulose-containing material without using sulphur-containing cooking liquids, thereby removing the problems, for example smell problems, which are associate...  
WO/1998/011294
This invention relates to an environmentally preferred process for the delignification of a cellulosic biomass comprising pulp. The process uses the oxidative properties of nascent oxygen to complete pulping and bleaching operations. The...  
WO/1998/006857
A novel arabinase; a DNA encoding the arabinase; an expression vector containing the DNA; a host cell containing the vector; a process for producing the arabinase; a composition containing the arabinase, a protopectinase, and optionally ...  
WO/1998/004775
Ethylene diamine disuccinic acid, ethylene diamine diglutaric acid, hydroxypropylene diamine disuccinic acid, their alkaline metal salts or ammonium salts and mixtures of said compounds are used as complexing agents for alkaline earth me...  
WO/1998/000216
A composition comprising an aqueous emulsion of the following components: a) one or more silicone fluids; b) one or more silicone containing surface active agents; c) one or more non-silicone containing surface active agents; and d) a so...  
WO/1997/049858
The invention concerns a sulphur-free method of manufacturing paper pulp/cellulose using quaternary ammonium compounds, preferably tetraalkylammonium or tetralkylarylammonium compounds.  
WO/1997/041294
A method of continuously producing paper pulp by integrating the process steps of impregnating fiber material and boiling the impregnated fiber material, the boiling being commenced with digesting liquor containing white liquor of high s...  
WO/1997/039181
The present invention relates to a method and apparatus for filling a pulp tank, according to which invention pulp is pumped into a pulp tower (10) in such a way that it can be supplied into the tower (10) at different levels from at lea...  
WO/1997/038157
The present invention relates to a process for continuously guiding the liquid when digesting pulp in a digester, wherein liquid used in a particular process step can circulate between containers or tanks (IL 1, IL 2; CL1, CL2) arranged ...  
WO/1997/038156
The invention concerns a process for continuously supplying liquid during the boiling of cellulose in a boiler, the liquid which is used in a given process step being able to circulate between at least two containers or tanks (IL1, IL2; ...  
WO/1997/037007
An enzyme multimer is provided which comprises a plurality of monomer units including a first monomer unit having enzymatic activity and a second monomer unit having enzymatic activity, wherein each of the first monomer unit and the seco...  
WO/1997/035067
A composition and method for the control of foaming in the black liquor of a papermaking operation comprising at least one conventional defoamer and at least one polymer selected from the group consisting of a polyethyleneimine, a conden...  
WO/1997/033035
The present invention relates to a continuous process for acid hydrolysis of lignocellulosic material through which the delignification and saccharification operations are carried out in a single reaction cycle utilizing a solubilizing o...  
WO/1997/032075
The method of the invention involves treating cellulosic vegetable matter (the "Feed Stocks") for the selective recovery of lignin (when present in the feed stock), cellulose and hemicelluloses by: (1) reducing the material to be process...  
WO/1997/029236
A method for cooking chips, involving steaming the chips, impregnating the chips with impregnating liquid in an impregnation vessel (2), which impregnating liquid comprises fresh cooking liquid and spent liquor, extracting spent liquor f...  
WO/1997/028305
The invention relates to a process and apparatus for pretreating pulp raw material, to be subsequently prepared in a chemical pulping process, and for preparing cellulose pulp from a fibrous starting material. According to the process th...  
WO/1997/026403
The invention relates to a process of environmentally friendly production of pulp from herbaceous plants or the like by subjecting the plants to formic acid cooking and if desired to bleaching with oxidizing bleaching chemicals. The inve...  
WO/1997/026404
A method for treating ligno-cellulosic material with high frequency energy (18) or an electro-osmotic step (36) to enhance the removal of lignin from the material or improve the absorption characteristics of the material during pulp and ...  
WO/1997/026402
The present invention relates to a process for the delignification of lignocellulose material, preferably wooden material, for the production of paper pulp. An additive in the state of an aqueous solution of phenols and pyrazolidones is ...  
WO/1997/022749
Process for producing lignocellulosic pulp fibers with improved properties by treating the refiner pulp with chemicals to adjust the pH, treating it at high temperature and with chemical charges, and thereafter subject it to a refining s...  
WO/1997/020920
A novel purified xylanase produced by Acidothermus sp. is disclosed having a pH optimum of between about 3.6-4.2 and a molecular weight of between about 50-55 kD as determined by gel filtration. The disclosed xylanase is useful in the bl...  
WO/1997/020102
A method for continuously preparing cellulose pulp, in particular for use in the chemical or paper industry, from a raw material consisting of textile fibres. The method comprises separating the textile fibres from foreign matter, contin...  
WO/1997/019220
The invention relates to the paper pulp industry, specifically to a process for preparing a pulp cooking solution used for obtaining a fibrous semi-finished product. This involves saturating a solution of sodium carbonate in waste water ...  
WO/1997/019221
The invention concerns a method of obtaining cellulose fibre material from a plant substrate containing calcium pectinate, the plant substrate being solubilized by using trisodium phosphate and optionally bleached. The method is characte...  
WO/1997/014490
A defoamer/antifoam composition containing a diester of an ethylene oxide/propylene oxide block copolymer and a fatty acid containing from 2 to 30 carbon atoms. In an alternative embodiment, the composition also contains a diester of a p...  
WO/1997/013862
The present invention provides polypeptides with cellulase activity, corresponding DNA sequences, vectors, transformed hosts and a method for the production of these polypeptides, which are obtainable from Aspergillus niger var. niger or...  
WO/1997/010384
The determination of the end of the digestion time is essential in cellulose digestion for the product quality and/or yield. According to the invention, this is done by measurement of the pH in-situ and possibly the colour of the digesti...  
WO/1997/003243
Method of cooking chips, which are impregnated with liquid in a vessel (3) in a cocurrent impregnation zone (A) and a subsequent countercurrent impregnation zone (B), whereby impregnation liquid is supplied in a mixture together with ste...  
WO/1997/003244
A method for cooking chips which are impregnated, in a vessel (3), with liquid in first and second concurrent impregnation zones (A, B), impregnation liquid being supplied, in a mixture with steamed chips, through a feeding system to the...  
WO/1997/001666
A continuous pulp digester (102) having an elongate horizontally aligned pressure vessel (110) through which the wood chips (104) and digesting fluid flow in a forward direction. In a first and second embodiments within pressure vessel t...  
WO/1997/000997
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...  

Matches 451 - 500 out of 1,000