Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 601 - 650 out of 2,361

Document Document Title
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...  
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...  
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...  
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...  
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 ...  
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...  
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...  
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...  
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 ...  
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; ...  
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...  
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...  
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 ...  
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...  
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...  
WO/1997/049858A1
The invention concerns a sulphur-free method of manufacturing paper pulp/cellulose using quaternary ammonium compounds, preferably tetraalkylammonium or tetralkylarylammonium compounds.  
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...  
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...  
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; ...  
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 ...  
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...  
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...  
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...  
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...  
WO1997019220A3  
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...  
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...  
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 ...  
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 ...  
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...  
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...  
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...  
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...  
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 ...  
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...  
WO1997010384A3  
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...  
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...  
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...  
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...  
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...  
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...  
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/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/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/1996/033308A1
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 ...  

Matches 601 - 650 out of 2,361