| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 07/11/2000 | US6086712 DOM control in cellulose pulp production |
| 07/06/2000 | WO2000039390A1 Kraft wood fibers for carboxyalkyl cellulose |
| 07/06/2000 | WO2000039389A1 Carboxylated cellulosic fibers |
| 07/06/2000 | WO2000039388A1 High bulk, high strength fiber material with permanent fiber morphology |
| 07/06/2000 | WO2000038607A1 Absorbent structures of chemically treated cellulose fibers |
| 07/05/2000 | EP1015123A1 Apparatus for cleaning a suspension, preferably a fiber mass suspension |
| 07/05/2000 | CN1054169C Aminoalkane diphosphonic acids in pulp bleaching |
| 07/04/2000 | US6083733 Hydrolase enzymes from a thermophilic microorganism; for papermaking |
| 06/29/2000 | DE19909546C1 Enzymatic oxidation system, e.g. for lignin oxidation, bleaching, chemical synthesis or waste water treatment, comprises a manganese oxidase, an oxidizing agent and manganese ions |
| 06/28/2000 | EP1013825A1 Method of making absorbent sheet from recycle furnish |
| 06/28/2000 | EP1012392A1 Polyammonium quaternary polymer for controlling anionic trash and pitch deposition and treating coated broke |
| 06/28/2000 | EP1012376A2 Oxidation and bleaching system with enzymatically produced oxidizing agents |
| 06/28/2000 | EP0889993B1 Absorbent cellulosic material and production thereof |
| 06/27/2000 | US6080275 Oxygen delignification of medium consistency pulp slurry |
| 06/22/2000 | WO2000036215A1 Softened comminution pulp |
| 06/22/2000 | CA2354565A1 Softened comminution pulp |
| 06/21/2000 | EP1009993A1 Method and arrangement for measuring the content of chemicals during bleaching |
| 06/21/2000 | EP1009522A1 Method and device for treating an aqueous working medium with at least one treating fluid |
| 06/20/2000 | US6077396 Apparatus for fluffing and contacting high consistancy wood pulp with a gaseous bleaching reagent |
| 06/20/2000 | US6076956 Device for distributing suspensions in a container |
| 06/20/2000 | CA2023437C Finely divided suspension of cellulosic material and process for producing the same |
| 06/14/2000 | EP0866895B1 Oxygen delignification of medium consistency pulp slurry |
| 06/14/2000 | EP0786029B1 Method for removal of hexenuronic acid groups in cellulose pulp by heat treatment |
| 06/14/2000 | EP0659222B1 Oxidative bleaching of wood pulp by vanadium-substituted polyoxometalates |
| 06/14/2000 | CN2382744Y Parallel spin double screw pulpe extruder |
| 06/13/2000 | US6074863 Hydrolytic enzyme for the treatment of paper products or use as a detergent enzyme |
| 06/13/2000 | US6074527 Production of soft paper products from coarse cellulosic fibers |
| 06/13/2000 | US6074524 Mineral filler particles |
| 06/13/2000 | US6074522 Process to optimize pulp washing variables |
| 06/13/2000 | US6073865 Process and devices for manufacturing a hot friable material |
| 06/07/2000 | CN1053242C Straw pulp performance improving tech. using xylanase |
| 06/06/2000 | US6071735 Enzyme preparation with endoglucanase activity |
| 06/06/2000 | US6071380 Method of papermaking having zero liquid discharge |
| 06/06/2000 | US6071378 Suspension is rotated in a rotationally symmetrical, rapidly rotating, liquid-permeable screen basket to subject it to the influence of a centrifugal force and dewatered at the same time as the suspension is conveyed by a rotating screw |
| 06/02/2000 | WO2000031228A1 Stabilizing method |
| 05/31/2000 | EP0917553A4 Pitch control composition based on blend of derivatized cationic guar and styrene maleic anhydride copolymer |
| 05/31/2000 | DE19853122A1 Free-flowing, non-scale forming formamidine-sulfinic acid mixtures for use in reductive bleaches in the paper and textiles industries |
| 05/31/2000 | CN1255165A Phenolic acid esterase and use thereof |
| 05/30/2000 | US6069688 Method for producing continuous in-like kappa measurements for papermaking pulps |
| 05/30/2000 | CA2023429C Process for bleaching and delignification of lignocellulosic materials |
| 05/24/2000 | EP0800596B1 Bleaching of filled paper |
| 05/23/2000 | US6066286 Exposing sulfur dioxide and oxygen to ultraviolet free radical producing energy and contacting the polymer with this product in a reduced pressure environment. |
| 05/23/2000 | US6066233 Method of improving pulp freeness using cellulase and pectinase enzymes |
| 05/23/2000 | CA2115881C Non-chlorine bleaching of kraft pulp |
| 05/23/2000 | CA2069876C An apparatus for filtering suspensions and a method of operating the apparatus |
| 05/18/2000 | WO2000028134A1 Dewatering device |
| 05/18/2000 | CA2350102A1 Dewatering device |
| 05/17/2000 | EP1000032A1 Inhibition of pulp and paper yellowing using nitroxides and other coadditives |
| 05/11/2000 | WO2000026466A1 Vegetable-material based preparations for reducing and/or preventing slime and encrustation closed aqueous or water-carrying systems |
| 05/09/2000 | US6059927 Method of reducing brightness reversion and yellowness (B*) of bleached mechanical wood pulps |
| 05/09/2000 | US6059925 Method to regenerate gas mixture in ozone-bleaching process |
| 05/09/2000 | US6059924 From pulp slurry; prerefining |
| 05/04/2000 | WO2000024963A1 Inhibition of pulp and paper yellowing using hydroxylamines and other coadditives |
| 05/04/2000 | DE19850170A1 Nicht-toxisches Verfahren zur Verhinderung von Biobewuchs in geschlossenen wäßrigen oder wasserführenden Systemen A non-toxic method of preventing biofouling in closed aqueous or water-bearing systems |
| 05/04/2000 | CA2346211A1 Inhibition of pulp and paper yellowing using hydroxylamines and other coadditives |
| 05/03/2000 | EP0755468B1 Preparation process of paper for increasing filler contents and enhancing scott internal bond strength |
| 05/03/2000 | CN1252111A Production of fibrous materials with improved properties |
| 05/03/2000 | CN1052049C Method of producing mechanical and chemi-mechanical pulp |
| 05/02/2000 | US6057438 Process for the co-production of dissolving-grade pulp and xylan |
| 05/02/2000 | US6056853 Process for peroxide bleaching of pulp using MgO particles |
| 05/02/2000 | CA2138547C Process for bleaching pulp in conjunction with adsorption of metals |
| 04/27/2000 | WO1999063149A8 Method for selectively delignifying lignocellulosic materials |
| 04/26/2000 | CN2375659Y Multi-screw pulp thickener |
| 04/26/2000 | CN1051825C Two stage pulp bleaching reactor and bleaching method thereof |
| 04/26/2000 | CN1051824C Individualized polycarboxylic crosslinked fibers |
| 04/18/2000 | US6051160 Liquid composition for control of pitch deposition in pulp and paper making comprising in aqueous solution a derivatized cationic guar and a styrene maleic anhydride copolymer having an average molecular weight of from 500 to 10,000 |
| 04/18/2000 | US6051109 Apparatus for distributing fluffed pulp into a static bed reactor |
| 04/13/2000 | WO2000020678A1 Oxygen gas bleaching of pulp |
| 04/12/2000 | EP0991812A1 Method for the preparation of cellulose pulp, cellulose pulp to be used in absorption products, and absorption product |
| 04/12/2000 | EP0991808A1 Method and installation for the continuous preparation of paper pulp from lignocellulose textile fibres |
| 04/11/2000 | US6048437 Process for bleaching chemical pulp with chlorine dioxide, peroxide and Na2 M0 O4 as reaction catalyt |
| 04/06/2000 | WO2000019006A1 Oxygen bleaching of pulp using an agglomerated bleach activator |
| 04/06/2000 | WO2000019005A1 A sanitary paper product made by modifying coarse fibers and process thereof |
| 04/06/2000 | CA2344833A1 Oxygen bleaching of pulp using an agglomerated bleach activator |
| 04/06/2000 | CA2344820A1 A sanitary paper product made by modifying coarse fibers and process thereof |
| 04/05/2000 | EP0758378B1 Thermostable xylanases |
| 04/04/2000 | CA2049952C A process and apparatus for continuous filtering and liquid displacement of a liquid suspension of a fibrous or finely-divided material |
| 03/30/2000 | WO2000017443A1 Method and apparatus for the thickening of fiber suspensions |
| 03/30/2000 | WO2000017442A1 Method for bleaching mechanical pulp |
| 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 | EP0988322A1 Ultra-fine microcrystalline cellulose compositions and process for their manufacture |
| 03/29/2000 | CA2278950A1 Enzymatic paper and process of making thereof |
| 03/28/2000 | US6042690 Method for the bleaching of pulp in a D2D sequence wherein the effluent contains reduced colored matter |
| 03/23/2000 | WO2000015900A1 Method and apparatus for washing fibre pulp mixture |
| 03/23/2000 | CA2343957A1 Method and apparatus for washing fibre pulp mixture |
| 03/22/2000 | EP0986673A1 Self-emulsifiable isocyanate and coupling agent compositions for enhancing the strength and sizing properties of cellulosic fiber and method of making and using therefor |
| 03/22/2000 | EP0986671A1 Improved papermaking processes |
| 03/22/2000 | EP0986670A1 Methods and compositions for treating stickies |
| 03/22/2000 | CN1050643C Oxygen bleaching method of medium density paper pulp |
| 03/22/2000 | CN1050642C High concentration paper pulp bleaching method |
| 03/21/2000 | US6039837 Ozone bleaching waste liquor is mixed with waste liquor from an alkaline treatment stage, to obtain neutral solution, cooling to precipitate sodium sulfate, separating and dissolving in water, performing electrolysis |
| 03/21/2000 | CA2166242C Process for the bleaching of a microsized plant powder |
| 03/16/2000 | WO2000014327A1 Ozone bleaching process comprising oxalic acid addition |
| 03/15/2000 | EP0985068A1 Device for dehydrating and washing suspensions of fibrous material |
| 03/15/2000 | CN2368873Y Vibration pulp purifying and concentrating screen |
| 03/15/2000 | CN1050380C Bleaching or sterilizing method |
| 03/14/2000 | US6037380 Ultra-fine microcrystalline cellulose compositions and process |