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WO/1999/007936A1 |
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...
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WO/1998/059107A1 |
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...
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WO/1998/058119A1 |
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...
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WO/1998/056981A1 |
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 ...
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WO/1998/056978A1 |
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...
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WO/1998/056979A1 |
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...
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WO/1998/056980A1 |
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...
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WO/1998/049390A1 |
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...
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WO/1998/036124A1 |
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...
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WO/1998/035090A1 |
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...
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WO/1998/035091A1 |
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...
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WO/1998/033970A1 |
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...
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WO/1998/032912A1 |
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...
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WO/1998/032913A1 |
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 ...
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WO/1998/031871A1 |
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...
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WO/1998/020198A1 |
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...
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WO/1998/017857A1 |
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...
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WO/1998/015687A1 |
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 ï...
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WO/1998/014270A1 |
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; ...
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WO/1998/013547A1 |
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...
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WO/1998/011294A1 |
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...
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WO/1998/006857A1 |
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 ...
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WO/1998/004775A1 |
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...
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WO/1998/000216A1 |
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...
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WO/1997/049858A1 |
The invention concerns a sulphur-free method of manufacturing paper pulp/cellulose using quaternary ammonium compounds, preferably tetraalkylammonium or tetralkylarylammonium compounds.
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WO/1997/041294A1 |
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...
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WO/1997/039181A1 |
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...
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WO/1997/038156A1 |
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; ...
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WO/1997/038157A1 |
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 ...
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WO/1997/037007A1 |
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...
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WO/1997/035067A1 |
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...
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WO/1997/033035A1 |
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...
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WO/1997/032075A1 |
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...
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WO/1997/029236A1 |
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...
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WO/1997/028305A1 |
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...
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WO/1997/026404A1 |
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 ...
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WO/1997/026402A1 |
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 ...
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WO/1997/026403A1 |
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...
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WO/1997/022749A1 |
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...
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WO/1997/020920A1 |
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...
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WO/1997/020102A1 |
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...
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WO/1997/019220A2 |
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 ...
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WO/1997/019221A1 |
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...
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WO/1997/014490A1 |
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...
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WO/1997/013916A2 |
The aim of the invention is to determine the point in time during pulp cooking at which the viscosity and/or kappa number of the pulp produced have predetermined values. Since these values can be determined only after the cooking process...
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WO/1997/013862A1 |
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...
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WO/1997/010384A2 |
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...
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WO/1997/003244A1 |
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...
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WO/1997/003243A1 |
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...
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WO/1997/001666A1 |
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...
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