| Patents for D21C 5 - Other processes for obtaining cellulose, e.g. cooking cotton linters (5,432) |
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| 06/21/2000 | DE19904349A1 Pulping used paper for recycling has a loosening stage where the hydrogen bridges are broken by steam or gas before a mechanical stirring stage to prepare a suspension for the separation of impurities |
| 06/20/2000 | US6077389 Method for obtaining regenerated pulp of high brightness |
| 06/20/2000 | CA2023437C Finely divided suspension of cellulosic material and process for producing the same |
| 06/18/2000 | CA2292469A1 Recovery of fibers from a fiber processing waste sludge |
| 06/14/2000 | EP0868560B1 Office wastepaper deinking process |
| 06/13/2000 | US6074527 Production of soft paper products from coarse cellulosic fibers |
| 06/08/2000 | WO2000032867A1 Method for removing printing inks from waste paper |
| 06/08/2000 | DE19856207A1 Assembly for cleaning a paper fiber suspension has a vertical round sieve with an upper flotation foam collection zone and a pump action for the suspension and bubbles through the sieve without a turbulence generator |
| 06/08/2000 | DE19855326A1 Verfahren zur Entfernung von Druckfarben aus bedrucktem Altpapier A process for removing printing inks from printed wastepaper |
| 06/08/2000 | CA2351855A1 Hydrophilic dispersion polymers of diallyldimethyl ammonium chloride and acrylamide for the clarification of deinking process waters |
| 06/07/2000 | EP0717799B1 Process and apparatus for manufacturing absorbent granular material |
| 06/06/2000 | US6071735 Enzyme preparation with endoglucanase activity |
| 06/06/2000 | US6071380 Method of papermaking having zero liquid discharge |
| 05/31/2000 | EP1003871A2 Trichoderma reesei swollenin protein and encoding dna sequence |
| 05/30/2000 | US6068734 Paper contains given amount of a high temperature chemithermomechanical pulp of given physical properties such as long fiber content, fine-material content, shive content and tensile index and a chemical pulp or recycled fiber pulp |
| 05/30/2000 | US6068132 Perfected reactor for liquids purification |
| 05/23/2000 | US6066486 For treatment of eggs, treatment of resin-containing papermaking pulp, for hydrolysis or synthesis of sterols or lanolin |
| 05/23/2000 | US6066379 Repulpable, water repellant paperboard |
| 05/23/2000 | US6066233 Method of improving pulp freeness using cellulase and pectinase enzymes |
| 05/23/2000 | CA2115881C Non-chlorine bleaching of kraft pulp |
| 05/17/2000 | EP1001018A2 Cellulases obtainable from alkalophilic Bacillus sp. ac13 |
| 05/17/2000 | EP0815175B1 Recycling of mineral fillers from the residue of a paper deinking plant |
| 05/17/2000 | CN1253193A Production method of south Africa Hibiscus cancellatus paper pulp |
| 05/16/2000 | CA2129223C Deinking agent and method of deinking through flotation using the deinking agent |
| 05/11/2000 | WO2000026468A1 Modified cationic polymers, a method for the production thereof and their use during paper production |
| 05/11/2000 | WO2000025600A1 Method for processing straw pulp |
| 05/11/2000 | DE19850817A1 Modifizierte kationische Polymere, Verfahren zu ihrer Herstellung und ihre Verwendung bei der Papierherstellung Modified cationic polymers, methods for their preparation and their use in papermaking |
| 05/11/2000 | CA2347788A1 Modified cationic polymers, their preparation and their use in papermaking |
| 05/10/2000 | EP0874935B1 Process for producing pulp from lignocellulosic plants, and pulp obtained |
| 05/04/2000 | WO2000024962A1 Paper repulping method |
| 05/04/2000 | CA2348716A1 Paper repulping method |
| 05/03/2000 | EP0602182B1 Apparatus and method for deinking waste paper pulp |
| 05/02/2000 | US6057438 Process for the co-production of dissolving-grade pulp and xylan |
| 05/02/2000 | US6057375 Use of alkoxylation products of epoxidized fats as antifoaming agents |
| 04/27/2000 | WO1999046444A8 Eucalyptus biokraft pulping process |
| 04/25/2000 | US6053328 Baffle for reactors used for liquids purification |
| 04/19/2000 | EP0705327B1 Multicomponent bleaching system |
| 04/18/2000 | US6051435 Freezing, lyophilizing cold aqueous extraction of plant material, reextracting with dilute boiling hydrochloric acid, analyzing to reveal pattern of carbohydrate multimers to indicate stress; relevant to water stress in cotton plants |
| 04/18/2000 | CA2053504C Recovery of surfactant from papermaking process |
| 04/13/2000 | WO2000020677A1 Delignified soybean hull fiber and methods of making and using |
| 04/12/2000 | EP0991808A1 Method and installation for the continuous preparation of paper pulp from lignocellulose textile fibres |
| 04/06/2000 | WO2000019005A1 A sanitary paper product made by modifying coarse fibers and process thereof |
| 04/06/2000 | CA2344820A1 A sanitary paper product made by modifying coarse fibers and process thereof |
| 04/05/2000 | EP0758378B1 Thermostable xylanases |
| 03/30/2000 | DE19842662A1 Composition for modification, degradation or bleaching of material containing lignin contains peracid and/or chelant in addition to oxidoreductase with oxidant and mediator and/or hydrolase |
| 03/29/2000 | EP0989229A1 Process to eliminate stickies from paper pulp obtained from waste paper using hydrophobised minerals |
| 03/29/2000 | EP0988415A1 Modified cellulosic fibers and fibrous webs containing these fibers |
| 03/29/2000 | EP0988402A1 Process for the production of sylose from a paper-grade, hardwood pulp |
| 03/29/2000 | CN1050871C Method and apparatus for separating paper fibre and plastics from mixed waste materials and products obtained thereby |
| 03/23/2000 | WO2000015899A1 Methods for deinking and decolorizing printed paper |
| 03/23/2000 | CA2343216A1 Methods for deinking and decolorizing printed paper |
| 03/22/2000 | EP0986669A1 Psa-promoted process for removing contaminants from paper pulp |
| 03/16/2000 | WO2000014326A1 Method for biologically obtaining cellulose fibre material from a vegetable material containing calcium peculate |
| 03/15/2000 | EP0806978B1 Use of alkoxylation products of epoxidized fats as antifoaming agents |
| 03/15/2000 | CN1247249A Technology for regenerating waste paper without discharge of waste liquid |
| 03/09/2000 | WO2000012810A1 Method for preparation of a fibrous stock out of herb-stemmed plants |
| 03/08/2000 | EP0730688B1 Deinking of waste paper by treatment with starch degrading enzyme e.g. amylase |
| 03/08/2000 | EP0686216B1 Inhibition of hydrogen peroxide decomposing enzymes, e.g. catalase and peroxidase during bleaching of cellulose fibers |
| 03/08/2000 | CN1246901A Method of making sanitary paper products from recycled newspapers |
| 03/08/2000 | CN1050164C Manufacture technology of sea-weed fibre |
| 03/01/2000 | EP0861347B1 Method of obtaining cellulose fibre material from a plant substrate containing calcium pectinate |
| 02/24/2000 | WO2000009707A1 Cellulase producing actinomycetes, cellulase produced therefrom and method of producing same |
| 02/24/2000 | DE19827188C1 Processing used paper takes a fraction with a high wood content through water extraction for a thick material to be heated and subjected to shear forces together with chemical additives |
| 02/22/2000 | US6027610 Production of soft paper products from old newspaper |
| 02/22/2000 | US6027608 Converting to fiber, protein, and oil by contacting the feather and avian parts mixture with solvent; drying; shredding and comminuting; and classifying the components from the waste stream; use in fabrics, fertilizers, feeds |
| 02/22/2000 | CA2032256C Biological method of deinking printed wastepaper |
| 02/08/2000 | US6022423 Method for deinking paper |
| 02/03/2000 | WO2000005310A1 Cellulose fiber based compositions and film |
| 02/02/2000 | EP0975740A1 Method for enhancing the activity of an enzyme, bleach composition, detergent composition and process for inhibiting dye transfer |
| 02/01/2000 | US6019873 Floor absorbent granular product |
| 01/25/2000 | US6017870 From fermentation of trichoderma |
| 01/25/2000 | US6017749 A biological culture capable of producing protease, xylanse and cellulase |
| 01/25/2000 | US6017475 Process of transforming household garbage into useful material |
| 01/25/2000 | US6017415 Feeding waste paper/paperboard products made of cellulosic in non-pulp form, wood chips and cooking solution into a digester, cooking under pressure to form pulp, discharging cooking solution and pulp from digester, washing the solution |
| 01/20/2000 | DE19754766A1 Production of cellulose useful for paper making by digesting potato tops with enzymes and sodium hydroxide solution |
| 01/19/2000 | EP0910695B1 Methods for inhibiting organic contaminant deposition in pulp and papermaking systems |
| 01/11/2000 | US6013157 Aqueous pulp suspension comprising secondary fibers cotaining ink particles mixed wtih a chemical deinking agent and a froth moderating agent |
| 01/05/2000 | EP0775165B1 Dadmac/vinyl trialkoxysilane copolymers and their use in wastewater treatment |
| 01/05/2000 | DE19829315A1 System for the removal of solid matter from a fiber suspension |
| 01/04/2000 | US6010892 Animal feed |
| 01/04/2000 | US6010593 Measuring suspensed ink particle; separation |
| 12/29/1999 | EP0967321A1 A method for recycling of old corrugated container using flotation and kneading treatment |
| 12/29/1999 | EP0967320A1 A method for recycling of old corrugated container using flotation and enzymatic hydrolysis |
| 12/29/1999 | CN1240008A Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing material or similar substances and process for using the same |
| 12/27/1999 | CA2276246A1 A method for recycling of old corrugated container using flotation and kneading treatment |
| 12/27/1999 | CA2276242A1 A method for recycling of old corrugated container using flotation and enzymatic hydrolysis |
| 12/23/1999 | WO1999066119A1 Arundo donax pulp, paper products, and particle board |
| 12/23/1999 | WO1999047743A9 Method and apparatus for deinking paper |
| 12/23/1999 | CA2339064A1 Arundo donax pulp, paper products, and particle board |
| 12/15/1999 | CN1238818A Production of soft paper products from coarse cellulosic fibers |
| 12/14/1999 | US6001639 Endoglucanases |
| 12/14/1999 | US6001218 Pulping newspapers in water with agitation forming pulp slurry; adding surfactant and heating slurry so that oil in newspaper is retained; increasing consistency of slurry; forming treated pulp into sanitary paper products |
| 12/14/1999 | US6000552 Process for purification of a fiber suspension |
| 12/14/1999 | CA2171340C Process and apparatus for manufacturing granular material |
| 12/08/1999 | EP0961926A1 A method and an arrangement for measuring the amount/activity of catalase before or in connection with bleaching of preferably cellulose fibres included in a pulp suspension |
| 12/07/1999 | USRE36424 Forming suspension; removal non-ink impurities; softening ink vehicle; deinking |
| 12/07/1999 | US5998197 The invention is judged of considerable importance in reducing the substantial amount of downtime caused by pitch deposits and accumulations in the pulp and paper and other industries which convert pulpwoods. |
| 12/07/1999 | US5997689 Bleaching |
| 12/07/1999 | US5996806 Method and apparatus for treating filler-containing material such as recycled fibers |
| 12/01/1999 | CN1237204A High molecular weight trichoderma cellulase |