| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 03/08/2006 | EP1631716A2 Method for bleaching fibrous materials |
| 03/08/2006 | CN1745211A Method of bleaching cellulose pulp in bleaching pipeline |
| 03/08/2006 | CN1745210A Method for washing paper pulp in bleaching pipeline and bleaching pipelinece |
| 03/08/2006 | CN1244735C Deinking technique for news bogus paper through enzyme |
| 03/08/2006 | CN1244734C Method of using thinning wood and other low specific gravity wood for leiser product |
| 03/08/2006 | CN1244701C Cellulases, genes encoding them and uses thereof |
| 03/01/2006 | CN1742136A Method for creating a fibrous substance suspension used for producing a tissue web or hygiene web |
| 02/28/2006 | US7005514 Process for preparing microcrystalline cellulose |
| 02/28/2006 | CA2182187C Apparatus for washing of pulp |
| 02/22/2006 | EP1627107A1 Method for controlling pitch and stickies deposition |
| 02/22/2006 | CN1737255A Paper pulp cleaning and bleaching process |
| 02/22/2006 | CN1737254A Pulp and paper making method by continuously boiling hollow palm fruit string fiber |
| 02/22/2006 | CN1737252A Yellow willow alkaline hydrogen peroxide pulp making method |
| 02/22/2006 | CN1243150C Pulping process for corn stover and other nonwood fibrous materials |
| 02/21/2006 | US7001484 Improving the bleaching process by stabilizing the chelated transition metal ions in slurry |
| 02/21/2006 | US7001483 utilizing the wood pulp mill bleach plant; pulp bleaching stage, washer, mixers for pulp, carboxylation chemicals and stabilizer supplies, small reaction chamber; catalytic oxidation system with hindered heterocyclic oxammonium or amine catalysts |
| 02/16/2006 | WO2006015847A1 Process for the enzymatic oxidation of a substrate comprising a primary hydroxyl group |
| 02/14/2006 | CA2235325C Acid treatment of pulp at high temperature in connection with bleaching |
| 02/14/2006 | CA2198045C Procedure for adding a filter into a pulp based on cellulose fibres |
| 02/14/2006 | CA2064045C Oxygen bleaching of pulp |
| 02/12/2006 | CA2547921A1 Bleaching process using radiation and free-radicals |
| 02/08/2006 | CN1240900C Biological enzyme deinking method for waste paper |
| 02/07/2006 | CA2347454C Method and apparatus for treating pulp |
| 02/02/2006 | US20060021724 comprising a xylanolytic bacterial strain, providencia and a ligninolytic bacteria consisting of serratia, and pseudomonas; biologically pure cultures; environmentally friendly, safe and efficient |
| 02/01/2006 | CN1729336A Sealing device |
| 02/01/2006 | CN1727572A Deinking device |
| 02/01/2006 | CN1239780C Cellulose ethers and method of preparing same |
| 01/31/2006 | US6991705 The alkalinity of the pulp suspension is increased by a combination of an alkali metal hydroxide feed and a carbon dioxide feed, which provides a significant buffering effect |
| 01/26/2006 | US20060020122 Xylanase, microorganisms producing it, DNA molecules, methods for preparing this xylanase and uses of the latter |
| 01/26/2006 | DE19500249B4 Verfahren zur Herstellung mikroklassifizierter Cellulose A process for producing cellulose mikroklassifizierter |
| 01/25/2006 | EP1618253A2 Method for creating a fibrous substance suspension used for producing a tissue web or hygiene web |
| 01/25/2006 | CN1726073A Apparatus for mixing |
| 01/25/2006 | CN1726072A Apparatus for mixing |
| 01/25/2006 | CN1238597C Bleaching method of bagasse pulp |
| 01/24/2006 | US6989449 Containing nitroxide or hydroxylamine moieties; use stabilizing pulp or paper against yellowing and discoloration due to light |
| 01/24/2006 | US6989078 System for conveying shredded pulp to an ozone reactor |
| 01/24/2006 | CA2076115C Liquid removal apparatus and method for wood pulp |
| 01/19/2006 | WO2006005797A1 Method for removing lignin from water |
| 01/19/2006 | DE202005017820U1 Material mixture useful as bleaching agent for e.g. bleaching vegetable fibers, comprises iminodisuccinate and tris(hydroxyalkyl)phosphane and/or their derivates and/or salts |
| 01/19/2006 | CA2573035A1 Method for removing lignin from water |
| 01/18/2006 | CN2752310Y Double-suction pulp washing engine |
| 01/18/2006 | CN1723316A Filler-fiber composite |
| 01/18/2006 | CN1723279A Culture having phenol oxidase-like activity |
| 01/17/2006 | US6987181 Oxidized polymeric carbohydrates and products made thereof |
| 01/17/2006 | US6986828 Allows the application of a controlled depressurisation which in turn allows to keep the natural texture of the fibers and to obtain a cellulose having a low degree of polymerization. |
| 01/17/2006 | US6986793 making intrafiber crosslinked cellulosic fibers obtainable from cellulosic fibers by treatment with a crosslinking agent in the presence of a polyol and then bleached |
| 01/12/2006 | US20060005934 Refining cellulosic fibers to provide refined fibers, combining the refined fibers with a dispersion medium to provide a fibrous slurry;depositing the fibrous slurry on a foraminous support to provide a wet composite; introducing an absorbent material into wet composite |
| 01/11/2006 | CN1720369A Method for improving the discoloration resistance of pulp and pulp improved in discoloration resistance |
| 01/11/2006 | CN1718920A Bleaching method of cotton stalk chemical pulp |
| 01/11/2006 | CN1718919A Method of preparing bleached chemical pulp using cotton stalk |
| 01/11/2006 | CN1718918A Method of removing resin in paper pulp by multienzyme synergistic action |
| 01/11/2006 | CN1718917A Production technology of extra low viscose refined cotton |
| 01/11/2006 | CN1718916A Method of preparing paper product using cotton stalk chemical pulp |
| 01/11/2006 | CN1718915A Method of manufacturing pulp using sunflower seed skin |
| 01/11/2006 | CN1236137C Bleaching pulp |
| 01/10/2006 | US6984447 Method of producing twisted, curly fibers |
| 01/10/2006 | US6984290 Method for applying water insoluble chemical additives with to pulp fiber |
| 01/04/2006 | EP1611282A1 Process for bio-bleaching of kraft pulp using bacterial consortia |
| 01/04/2006 | EP1611281A1 Purification of alkaline washing liquid |
| 01/04/2006 | EP1611279A2 Method for making chemically cross-linked cellulosic fiber in the sheet form |
| 01/04/2006 | CN2749916Y Spherical tank type paper pulp washing and blanching machine |
| 01/04/2006 | CN1715556A Method for pulping and paper-making |
| 01/04/2006 | CN1715555A Continuous boiling method and its device for semi chemical mechanical slurry of long bast fiber raw material |
| 01/03/2006 | CA2357738C Papermaking additive with primary amino groups and mechanical pulp treated therewith |
| 12/29/2005 | WO2005124017A1 Device and method for cleaning of a filter net of a pulp dryer's fan tower, a pulp dryer's fan tower and a pulp dryer |
| 12/29/2005 | DE102004028045A1 Verfahren und Vorrichtung zur Aufbereitung einer Faserstoffsuspension Method and apparatus for treating a pulp suspension |
| 12/28/2005 | EP1608809A1 Process for producing a fibrous composition |
| 12/28/2005 | EP1395700A4 Methods to enhance pulp bleaching and delignification |
| 12/28/2005 | EP1238141B1 Fibers from plant seeds and use |
| 12/22/2005 | WO2005121448A1 Method and device for preparing a fibrous material suspension |
| 12/22/2005 | WO2005121447A1 Treatment of pulp |
| 12/22/2005 | WO2005121443A1 Activator for pulp bleaching |
| 12/22/2005 | WO2005121442A1 Method for bleaching pulp |
| 12/22/2005 | US20050279473 Fibers for spunlaced products |
| 12/22/2005 | US20050279467 Adding a bleach to a stream of cellulosic pulp; pulp is retained at high temperature and pressure to increase bleaching activity but the pulp is cooled prior to discharge from the pressure vessel below the flash point; lower energy, nonviolent discharge |
| 12/22/2005 | US20050279466 forming slurries of hydrophilic materials into bundles; drying the fiber bundles; defibering the fiber bundles |
| 12/22/2005 | CA2569467A1 Activator for pulp bleaching |
| 12/22/2005 | CA2510090A1 Process for high temperature peroxide bleaching of pulp with cool discharge |
| 12/21/2005 | EP1607519A1 Activator for pulp bleaching |
| 12/21/2005 | EP1606446A1 Methods for bleaching of cellulosic materials |
| 12/15/2005 | WO2005118950A1 Method for producing a chemical conversion pulp |
| 12/15/2005 | WO2005118923A1 Method for producing cellulose shaped bodies |
| 12/15/2005 | WO2004101889A3 Use of hemicellulase composition in mechanical pulp production |
| 12/15/2005 | US20050276968 Flowable and meterable densified fiber particle |
| 12/15/2005 | CA2568594A1 Method for producing a dissovling pulp |
| 12/14/2005 | EP1604061A1 Bleaching of cellulose pulp in a first chlorine dioxide bleaching step |
| 12/14/2005 | EP1604060A1 Method for producing corn stalk pulp and paper products from corn stalk pulp |
| 12/14/2005 | EP1407073B1 Method of producing bleached thermomechanical pulp (tmp) or bleached chemithermomechanical pulp (ctmp) |
| 12/14/2005 | EP0966666B1 Method and apparatus for monitoring and controlling characteristics of process effluents |
| 12/14/2005 | CN1231636C Calcium carbonate synthesis method and resulting product |
| 12/14/2005 | CN1231634C Method for bleaching paper pulp |
| 12/08/2005 | WO2005080672A3 Method for reducing the extractives content of high-yield pulps and method for producing bleached high-yield pulps |
| 12/08/2005 | US20050269049 Reaction of a lignocellulose in an alkaline peroxide bleaching medium with a yellowing inhibitor: bis(piperidine)hydroxylamine hydrochloride derivative, especially N-(2,2,6,6-tetramethyl-1-hydroxyl-piperidin-4-yl)-N'-{2-[2-(2,2,6,6-tetramethyl-1-hydroxyl-piperidin-4-amino]-ethyl}-ethane-1,2-diamine 6HCl |
| 12/01/2005 | US20050263258 Impregnating a wet laid sheet of cellulosic fibers with a crosslinking agent {compound containing both an aldehyde and a carboxylic acid group: glyoxylic acid, succinic acid monoaldehyde}; optionally fiberizing in a hammer mill; and crosslinking at 320-435 degrees F.; centrifuge retention capacity |
| 12/01/2005 | DE19820947B4 Enzymatisches Bleichsystem mit neuen enzymwirkungsverstärkenden Verbindungen zum Verändern, Abbau oder Bleichen von Lignin, ligninhaltigen Materialien oder Verändern oder Abbau von Kohle sowie Verfahren unter Verwendung des Bleichsystems Enzymatic bleaching system with new enzyme action enhancing compounds for modifying, degrading or bleaching lignin, lignin-containing materials or modification or degradation of coal and method using the bleaching system |
| 11/29/2005 | US6969443 Making fiberous sheets by debonding with cationic ammonium compounds and a nonionic surfactant to reduce tensile strength of fibers and forming absorbent sheets |
| 11/29/2005 | CA2156523C Wood pulp processing apparatus and method |
| 11/24/2005 | WO2005035871A3 Cross-linked cellulose fibers and method of making same |
| 11/24/2005 | US20050257908 A pulped wood-derived cellulose fiber that has been treated with a water soluble copper salt and optionally didecyldimethylammonium chloride or didecyldimethylammonium bromide to obtain a copper content of 0.01-0.25% by weight; the treated fiber is resistant to fiber length degradation during refining. |
| 11/24/2005 | US20050257905 Process and composition for preparing a lignocellulose-based product, and the product obtained by the process |