Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 551 - 600 out of 2,256

Document Document Title
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/1997/038156A1
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/1997/037007A1
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...  
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...  
WO1997019220A3  
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/1997/026403A1
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/1997/026404A1
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/1997/022749A1
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/1997/003243A1
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/1997/003244A1
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/1997/001666A1
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/1997/000997A1
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 ...  

Matches 551 - 600 out of 2,256