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Matches 301 - 350 out of 689

Document Document Title
WO/2002/081816A1
The invention discloses a method of extracting extractives from wood chips. The method includes sterilization of wood chips under pressure and heat to obtain sterilized wood chips. The sterilized wood chips may be inoculated with selecte...  
WO/2002/075043A1
The present invention is a method for producing pulp from fibrous lignocellulose material using a treatment step which exposes the material to oxalic acid, or oxalic acid and sodium bisulfite, prior to pulping. The pulping of the resulti...  
WO/2002/065117A1
A method of selecting bulk wood units for mechanical pulping, which consists of establishing a reference scale by selecting a test sample, measuring the acoustic velocity through each sample unit, selecting acoustic velocity bands from t...  
WO/2002/042550A1
A continuous, alkaline process for the production of pulp from wood chips, wherein the preheated chips are subjected to an extended impregnation step for at least 60 min, preferably longer, at a temperature not exceeding the impregnation...  
WO/2002/042551A1
An alkaline batch process for the production of pulp from wood chips, wherein the preheated chips are subjected to an extended impregnation step outside the digester for at least 60 min, preferably longer, at a temperature not ex-ceeding...  
WO/2002/014598A1
A multi-function process for the separation of cellulose fibers (9) from the other constituents of lignocellulosic biomass such as found in grasses, agricultural waste, and waste paper with application in the preparation of feedstocks (1...  
WO/2002/002866A2
Disclosed is a substantially closed fungal incubation containment system for use in biopulping lignocellulosic material, the system being equipped with a means for controlling air flow to or from the materials. Also disclosed are methods...  
WO/2001/059203A2
The present invention relates to a process for the removal of lignin from lignocellulose containing material comprising treating the lignocellulose containing material prior to a high-yield pulping process with a delignifying gas compris...  
WO/2001/059202A2
The present invention relates to a process for the removal of lignin from lignocellulose containing material comprising treating the lignocellulose containing material prior to a chemical pulping process with a delignifying gas, wherein ...  
WO/2001/032715A1
Disclosed are processes and systems for the production of useful organic products from diverse lignocellulose-containing biomass having increased yield and efficiency over existing processes. In particular, the present invention integrat...  
WO/2001/025531A1
In a batch process for kraft pulp production, fouling of heat transfer surfaces is reduced. The first impregnation liquor withdrawn from the digester is rich in dissolved calcium-containing material. This material, when heated, releases ...  
WO/2001/014631A1
The invention relates to a compositions for increasing the mass absorption of polar systems in hydrophobic-hydrophilic hybrid materials containing (A) polar solvents and (B) surface-active organosilicon compounds selected from the group ...  
WO/2000/061858A1
The invention relates to a method for separating lignocellulose-containing biomass, especially wood, into the essential components in the form of lignin, hemicellulose and cellulose, with the following steps: a) pre-hydrolyzing the ligno...  
WO/2000/056973A1
A method and apparatus for subjecting a material in a liquid to explosive forces is provided. The method and apparatus involve a vessel (5) having a length greater than its width. The vessel (5) has a top (10) which is quickly and easily...  
WO/2000/052256A1
The main aspect of the present invention is based on introducing process fluid into a compressive pretreatment stage, in an environment of elevated temperature and pressure, thereby initiating lignin dissolution in the chips at a point f...  
WO/2000/047812A1
The process of the present invention relates to a substantially sulfur free process for the manufacturing of a chemical pulp with an integrated recovery system for recovery of pulping chemicals. The subject process is carried out in seve...  
WO/2000/039390A1
Disclosed is a method for producing kraft wood fiber having an alpha-cellulose content greater than 97 % and a viscosity greater than 40 centipoise. The method involves prehydrolyzing hardwood chips with water, kraft cooking, bleaching a...  
WO/2000/034568A1
The invention relates to a method of obtaining alpha dissolving pulp from wood chips by steam pressure treatment and subsequent removal of the hemicelluloses and the lignin. The inventive method is characterized in that the chips are imp...  
WO/2000/028133A1
A process for the production of pulp using alkaline delignification is disclosed, wherein cellulosic material is initially treated with steam, and a chelating agent is added in connection with the steam treatment. The end pH of the steam...  
WO/1999/066119A1
Composite panels and pulp, and paper products of the pulp, are produced from Arundo donax. In the fabrication of the composite panels, Arundo donax is comminuted (20) to a suitable size, combined with a binder (40, 50), and consolidated ...  
WO/1999/063149A1
Disclosed is a method for delignifying lignocellulosic materials by first treating the material with an alkaline solution in the presence or absence of anthraquinone, and then exposing the material to a polyoxometalate. Inclusion of the ...  
WO1999045191A9
Chemical cellulose pulp (e.g. kraft pulp) is produced with enhanced strength and/or yield using a strength or yield enhancing additive such as polysulfide or anthraquinone or its equivalents or derivatives, and in a manner that allows ef...  
WO/1999/054544A1
High-yield chemimechanical lignocellulosic pulp is produced from non-woody species by cutting and screening the non-woody species, soaking them in an acidic aqueous solution preferably containing a chelating agent, treating the washed no...  
WO/1999/046444A1
In a new process for preparing pulped wood chips for paper making, chips from a hardwood such as eucalyptus are inoculated with a living culture of one or more white rot fungi. The fungi propagate throughout the body of the wood chip, se...  
WO/1999/042652A1
The specification discloses a process for production of chemical fibrous pulp for making paper, paperboard and other fibrous products from herbaceous plants, such as kenaf. Pulp from the herbaceous plant is made by a process which involv...  
WO/1999/041448A1
A process for producing a pulp suitable for papermaking from a nonwood fiber source material is described. Exemplary nonwood fiber source materials include kenaf and industrial hemp. The process includes the steps of washing the nonwood ...  
WO/1999/020828A1
An improved method for acid sulfite pulping of wood chips in which wood chips are digested in an acid sulfite pulping liquor to produce a wood pulp is disclosed, which improvement includes adding to the chips, prior to mixing with the ac...  
WO/1999/020827A1
The invention relates to a process system and a method for preliminary treatment of disintegrated cellulose-containing material, preferably wood chips, prior to pulp digestion. The process system and the method according to the invention...  
WO/1999/014423A1
The invention relates to a process for producing pulp from cellulosic fiber material with improved polysulfide regeneration alone or in combination with polysulfide cooking. The cellulosic fiber material is impregnated with polysulfide b...  
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...  
WO/1999/004086A1
A process for extracting volatile organic compounds and pitch from wood particulates, thereby virtually eliminating the emission of volatile organic compounds into the atmosphere during the processing of wood particulates into commercial...  
WO/1999/004087A1
Paper and absorbent products having reduced pitch content and enhanced properties, including increased tensile index, tear index, burst index, Scott Bond, smoothness, and stiffness. Further, pulps of the invention, although having slight...  
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...  
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...  
WO/1998/042914A1
A biopulping process is provided which is capable of scale up to commercial quantities. The process utilizes a biosuppression step in which contaminating microorganisms which interfere with the colonization and propagation of lignin-degr...  
WO/1998/038328A1
Pulp is treated with a hemicellulase, e.g. a xylanase such as that derived from $i(Bacillus sp.) SD902, prior to being chemically modified. This results in excellent cellulose derivatives that could not be otbained by any conventional me...  
WO/1998/035092A1
A method in connection with continuous cooking of chips, comprising impregnation of the chips with impregnation liquid in an impregnation vessel (3) and cooking of the impregnated chips in a digester (4), the impregnation vessel and the ...  
WO/1998/035089A1
Method and apparatus for treatment of comminuted fibre material before chemical digestion of the material, whereby the material (a) in a first step is heated, preferably by addition of steam, in a gas atmosphere with a pressure (P1) and ...  
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/1998/031871A1
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/1998/019000A1
A system and method for feeding comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester (11) provide enhanced simplicity, operability, and maintainability by eliminating th...  
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/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/1997/029236A1
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/1997/026401A1
The invention relates to a process for producing pulp, from raw lignocellulosic material based on annual or perennial plants, or residues of such plants. The process comprises impregnating said raw material with an aqueous soda solution ...  
WO/1997/021734A1
Methods and apparatus are provided for the recovery of organic compounds from fibrous plant materials. Organic compounds which can be recovered from the fibrous plant materials include plant metabolites, such as arabinogalactan and pheno...  
WO/1997/013025A1
The present invention relates to the use of certain Basidiomycette fungi, in particular, white rot fungi, such as Phlebia tremellosa, Trichaptum biforme, Schizophyllum commune, and Phanerochaete gigantea, in preconditioning wood or pulpw...  

Matches 301 - 350 out of 689