| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 02/01/1999 | CA2242749A1 Process to optimize pulp washing variables |
| 01/28/1999 | WO1999004087A1 Pulp, paper and absorbent products of reduced pitch content and process |
| 01/28/1999 | DE19731577A1 Use of mixtures containing 1-hydroxy-1,1- di:phosphonic acid(s) |
| 01/27/1999 | EP0892865A1 Method for bleaching of lignocellulosic fibers |
| 01/27/1999 | EP0739434B1 Improved process for recycling bleach plant filtrate |
| 01/27/1999 | CN2305426Y Clamping net replacement wash hollander |
| 01/26/1999 | US5863389 Pulp bleaching reactor for dispersing high consistency pulp into a gaseous bleaching agent containing ozone |
| 01/26/1999 | CA2097473C Reactor system for treating cellulosic pulp |
| 01/26/1999 | CA2075509C Screen with a surface having projections or depressions |
| 01/26/1999 | CA1340348C Bleaching process for the production of high bright pulps |
| 01/21/1999 | WO1999002771A1 Method for the treatment of spent liquor from kraft pulp production |
| 01/21/1999 | WO1998046768A3 Phenolic acid esterase and use thereof |
| 01/20/1999 | EP0892107A1 Preparation of mechanical wood pulps with reduced energy |
| 01/20/1999 | EP0892065A1 Clonong and expression of xylanase genes from fungal origin |
| 01/20/1999 | EP0891439A1 Oxygen delignification of pulp in two stages |
| 01/20/1999 | CN2304683Y Energy saving pulping and sand removing apparatus |
| 01/20/1999 | CN1205375A Method for bleaching medium thick paper pulp by for hydrogen peroxide for medium-small paper mill |
| 01/20/1999 | CN1205366A System for electrochemical delignification of lignincontaining materials and process for its application |
| 01/19/1999 | CA2067748C Dye transfer inhibition |
| 01/17/1999 | CA2243228A1 Preparation of mechanical wood pulps with reduced energy |
| 01/13/1999 | EP0890579A1 Process for fluorinating cellulosic materials and fluorinated cellulosic materials |
| 01/13/1999 | EP0889997A2 Paper products having wet strength from aldehyde-functionalized cellulosic fibers and polymers |
| 01/13/1999 | EP0889993A1 Absorbent cellulosic material and production thereof |
| 01/13/1999 | EP0889988A2 Aldehyde-modified cellulosic fibers for paper products having high initial wet strength |
| 01/13/1999 | EP0861348A4 Neutral monoperoxysulfate bleaching |
| 01/13/1999 | EP0728238B1 Method of bleaching chemical paper pulp |
| 01/13/1999 | EP0726980B1 A method of separating metal ions from pulp |
| 01/13/1999 | CN1205042A Absorbent cellulosic material and production thereof |
| 01/13/1999 | CN1205040A Improved method of softening pulp and products produced by the same |
| 01/13/1999 | CN1204712A Pulp washing screening technology of black liquor extraction rate achieved 95% and basically no washing waste water discharging |
| 01/12/1999 | USRE36033 Treatment of fibers |
| 01/12/1999 | US5859286 Monomer, polymer of the same, and composition containing the polymer |
| 01/12/1999 | US5858172 Method of softening pulp and pulp products produced by same |
| 01/12/1999 | US5858170 With bypass conduit to control overpressurization of oxygen formed by decomposition of peroxide |
| 01/12/1999 | US5858021 Treating with water and an alkali metal hydorxide |
| 01/12/1999 | CA2092396C Washing process |
| 01/07/1999 | WO1999000545A1 Method of reducing the content of calcium in the liquid phase of a pulp suspension |
| 01/07/1999 | EP0888244A1 Method and apparatus for delivering a variable flow of hydrogen peroxide |
| 01/07/1999 | EP0803007B1 A method for bleaching secondary fibres |
| 01/06/1999 | CN1204375A Production of soft paper products from high and low coarseness fibers |
| 01/06/1999 | CN1204368A Cellulases, genes encoding them and uses thereof |
| 01/06/1999 | CN1041541C Chlorine dioxide pulp bleaching process |
| 01/05/1999 | US5856164 Dishwashing; cleaning compound |
| 12/30/1998 | WO1998059108A2 Oxidation and bleaching system with enzymatically produced oxidizing agents |
| 12/30/1998 | EP0791103A4 Method of papermaking having zero liquid discharge |
| 12/30/1998 | EP0642610B1 Treatment of bleach plant effluents |
| 12/30/1998 | CN2302281Y Jet type flotation ink-removing machine |
| 12/30/1998 | CN1203644A Oxygen delignification of medium consistency pulp slurry |
| 12/30/1998 | CN1203643A Oxygen delignification of medium consistency pulp slurry |
| 12/30/1998 | CN1203642A Method and apparatus for continuously preparing cellulose pulp |
| 12/30/1998 | CA2335253A1 Oxidation and bleaching system with enzymatically produced oxidizing agents |
| 12/29/1998 | US5853537 Process for treating pulpwoods and pulps with a pitch degrading fungus of the genus Ophiostoma |
| 12/29/1998 | US5853536 Method for ozone bleaching of cellulosic pulp at low consistency |
| 12/29/1998 | US5853535 Process for manufacturing bleached pulp including recycling |
| 12/29/1998 | US5853428 Metal ligand containing bleaching compositions |
| 12/23/1998 | WO1998058119A1 Method and installation for the continuous preparation of paper pulp from lignocellulose textile fibres |
| 12/23/1998 | CN1202944A Method for improving the efficiency of chemical pluping processes by pretreating wood or pulpwood with white rot fungi |
| 12/23/1998 | CA2296170A1 Method and installation for the continuous preparation of paper pulp from lignocellulose textile fibres |
| 12/17/1998 | WO1998056981A1 Modified cellulosic fibers and fibrous webs containing these fibers |
| 12/17/1998 | WO1998056958A1 Process for the production of xylose from a paper-grade, hardwood pulp |
| 12/17/1998 | WO1998056899A1 Method for enhancing the activity of an enzyme, bleach composition, detergent composition and process for inhibiting dye transfer |
| 12/17/1998 | WO1998056826A1 Ultra-fine microcrystalline cellulose compositions and process for their manufacture |
| 12/17/1998 | CA2293698A1 Method for enhancing the activity of an enzyme, bleach composition, detergent composition and process for inhibiting dye transfer |
| 12/17/1998 | CA2292587A1 Ultra-fine microcrystalline cellulose compositions and process for their manufacture |
| 12/16/1998 | EP0884415A1 Method of washing pulp in connection with bleaching |
| 12/16/1998 | EP0752024B1 Heat treated high lignin content cellulosic fibers |
| 12/16/1998 | CN1202187A Sulfonated polymers and method of sulfonating polymers |
| 12/15/1998 | US5849151 Continuous digester having means for implementing low dissolved solids profiling |
| 12/15/1998 | US5849150 Low dissolved solids control in pulp production |
| 12/10/1998 | WO1998055696A1 Self-emulsifiable isocyanate and coupling agent compositions for enhancing the strength and sizing properties of cellulosic fiber and method of making and using therefor |
| 12/10/1998 | WO1998055692A1 Methods and compositions for treating stickies |
| 12/10/1998 | WO1998055684A1 Multi-component system for modifying, decomposing or bleaching lignin, materials containing lignin or similar substances and methods for producing the same |
| 12/10/1998 | WO1998055489A1 Multi-constituent system for modifying, degrading or bleaching lignin, materials containing lignin or similar substances, and method for using the same |
| 12/10/1998 | WO1998055212A1 Method and device for treating an aqueous working medium with at least one treating fluid |
| 12/10/1998 | DE19723631A1 Mehrkomponentensystem zum Verändern, Abbau oder Bleichen von Lignin, ligninhaltigen Materialien oder ähnlichen Stoffen sowie Verfahren zu seiner Anwendung Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances and to processes for its application, |
| 12/10/1998 | DE19723629A1 Mehrkomponentensystem zum Verändern, Abbau oder Bleichen von Lignin, ligninhaltigen Materialien oder ähnlichen Stoffen sowie Verfahren zu seiner Anwendung Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances and to processes for its application, |
| 12/10/1998 | CA2293510A1 Self-emulsifiable isocyanate and coupling agent compositions for enhancing the strength and sizing properties of cellulosic fiber and method of making and using therefor |
| 12/10/1998 | CA2293312A1 Methods and compositions for treating stickies |
| 12/10/1998 | CA2291025A1 Method and device for treating an aqueous working medium with at least one treating fluid |
| 12/10/1998 | CA2240030A1 Method for washing bleached wood pulp |
| 12/09/1998 | EP0882814A1 System and process for the electrochemical cleavage of compounds |
| 12/09/1998 | EP0882152A1 Process for bleaching of a high yield pulp |
| 12/09/1998 | EP0882151A1 Process for the treatment of chemical pulp |
| 12/09/1998 | EP0767632A4 Method for delivering a gas-supersaturated fluid to a gas-depleted site and use thereof |
| 12/08/1998 | US5846788 Process for preparing a lignocellulose-based product, and product obtainable by the process |
| 12/06/1998 | CA2239591A1 System for the electrochemical delignification of lignin-containing materials and a process for its application |
| 12/03/1998 | WO1998054401A1 Device for dehydrating and washing suspensions of fibrous material |
| 12/03/1998 | WO1998053893A1 Extraction agents and method for use thereof |
| 12/02/1998 | EP0881326A1 Process for producing bleached special cellulose pulps |
| 12/02/1998 | EP0759105B1 Method for preparing delignified and bleached chemical paper pulps |
| 12/02/1998 | EP0721526B1 Method and apparatus for dewatering of a fibre suspension |
| 12/02/1998 | EP0720649B1 Novel xylanase, process for producing the same, method for the treatment of pulp, and production of xylo-oligosaccharides |
| 12/01/1998 | US5843278 Method of producing soft paper products |
| 12/01/1998 | US5842242 Method for increasing the consistency of pulp using a single roll displacment wash press |
| 12/01/1998 | CA2005087C Method for avoiding pitch troubles |
| 12/01/1998 | CA1340148C Method of reducing shrinkage during drying of a paper web |
| 11/25/1998 | EP0879318A1 Process for increasing the charge on a lignocellulosic material, product obtainable by the process, and use of the product in the preparation of a lignocellulose-based product |
| 11/25/1998 | EP0750693B1 Preparing individualized polycarboxylic acid crosslinked cellulosic fibers |
| 11/25/1998 | CN1200154A Oxygen delignification of lignocellulosic pulp in two steps |
| 11/24/1998 | US5842150 Rapid, accurate computerized spectrum analysis for monitoring pulp purity and physical properties as indicators of paper quality |