| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 01/24/2001 | EP1070045A1 Methods for the preparation of an n-bis- 2-(1,2-dicarboxy-ethoxy)-ethyl]amine derivative and products of the methods and their uses |
| 01/24/2001 | EP1069934A1 Pulp filter or washer and sealing for use therein |
| 01/24/2001 | EP0846199B1 Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing |
| 01/24/2001 | CN1281143A Optimum determining method of adding electric charge change over agent into waste paper |
| 01/23/2001 | US6176973 Absorbent material, absorbent body of the material, and method for preparation of the same |
| 01/18/2001 | WO2001004415A1 Method for eliminating detrimental substances in a process liquid |
| 01/18/2001 | WO2001004362A1 Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp |
| 01/18/2001 | CA2377695A1 Method for eliminating detrimental substances in a process liquid |
| 01/17/2001 | EP1068391A1 Method for producing pulp and paper with calcium carbonate filler |
| 01/17/2001 | EP1068388A1 Method for inhibiting the deposition of white pitch in paper production |
| 01/17/2001 | EP1068376A1 Lyocell fibers, and compositions for making the same |
| 01/16/2001 | US6174412 A soft, bright and strong tissue paper product prepared from fibers consisting essentially of raw cotton linter fibers. |
| 01/16/2001 | US6174409 Using chlorine dioxide and ozone in one and the same single stage of a bleaching sequence having a plurality of stages |
| 01/16/2001 | CA2044466C Deinking process |
| 01/11/2001 | WO2001002641A1 System for the oxygen delignification of pulp consisting of lignocellulose-containing material |
| 01/11/2001 | WO2001002640A1 System and process for the oxygen delignification of pulp consisting of lignocellulose-containing material |
| 01/11/2001 | WO2001002441A1 Treatment of pulp to produce microcrystalline cellulose |
| 01/11/2001 | WO2001002293A1 Method for stabilizing hydrogen peroxide |
| 01/11/2001 | CA2377732A1 Treatment of pulp to produce microcrystalline cellulose |
| 01/11/2001 | CA2374234A1 Process for stabilizing hydrogen peroxide |
| 01/10/2001 | EP1067237A1 System and process for the oxygen delignification of pulp consisting of lignocellulose-containing material |
| 01/10/2001 | EP0710214B1 The use of dialdehydes and acetals thereof for inhibiting decomposition of peroxide in the production and the treatment of recycled fiber pulp and other fiber pulp |
| 01/10/2001 | CN1279315A High-temp ClO2 bleaching method of sulfated wood pulp |
| 01/09/2001 | US6171441 Cellulose, neutralized pulps, recovering fibers, drying and curing |
| 01/03/2001 | EP1064082A1 Contaminant dispersants useful in recycling of treated containers |
| 01/03/2001 | CN1278878A Method for filling and coating cellulose fibers |
| 01/03/2001 | CN1278830A Ultra-fine microcrystalline cellulose compositions and process for their manufacture |
| 12/28/2000 | WO2000079040A1 Process and device for oxygen delignification giving improved kappa reduction |
| 12/28/2000 | WO2000079039A1 Sealing arrangement for a pulp dewatering arrangement |
| 12/27/2000 | EP1062388A1 Method for bleaching paper pulp |
| 12/27/2000 | EP1062387A1 Method for bleaching and/or delignification of paper pulp |
| 12/27/2000 | EP0904263B1 N-bis- or n-tris-[(1,2-dicarboxy-ethoxy)-ethyl]-amine derivatives and preparation and use of the same |
| 12/27/2000 | CN1278243A Diester amine adducts |
| 12/26/2000 | US6165318 Treating pulp with peroxide or peracid in presence of an activating transition metal at ph of 2 to 7 and compound which containing heteroatom which is capable of forming heteropolyacid with activating transition metal |
| 12/26/2000 | CA2063567C Cell wall loading of never-dried pulp fibers |
| 12/25/2000 | CA2312185A1 Control system for a filtrate splitting device |
| 12/21/2000 | WO2000077301A1 Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity |
| 12/21/2000 | WO2000077298A1 Method for removing water on the wire section of a pulp dryer and a dewatering unit |
| 12/21/2000 | WO2000077297A1 Bleaching activator and process for using the activator |
| 12/21/2000 | WO2000077296A1 Method and system for conveying shredded pulp to an ozone reactor |
| 12/21/2000 | WO2000076916A1 Chemical composition and method |
| 12/21/2000 | CA2374754A1 Bleaching activator and process for using the activator |
| 12/21/2000 | CA2374673A1 Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity |
| 12/20/2000 | EP1061173A1 Oxygen delignification of lignocellulosic material |
| 12/20/2000 | EP1060306A1 Method for treating process water |
| 12/20/2000 | CN1277283A Deoxidized xylon of lignin-cellulose material |
| 12/19/2000 | US6162326 Process for draining a fibrous pulp suspension |
| 12/19/2000 | US6162325 Papermaking; washing, defoaming, emulsification |
| 12/19/2000 | US6162324 Oxygen delignification of medium consistency pulp slurry using two alkali additions |
| 12/19/2000 | CA2069866C Apparatus for filtering liquids |
| 12/14/2000 | WO2000075420A1 Bleaching pulp with high-pressure o¿2? |
| 12/14/2000 | WO2000075419A1 Distribution device for a device for dewatering pulp |
| 12/14/2000 | CA2376528A1 Bleaching pulp with high-pressure o2 |
| 12/14/2000 | CA2311718A1 Oxygen delignification of lignocellulosic material |
| 12/13/2000 | EP1058751A1 Cotton linter tissue products and method for preparing same |
| 12/12/2000 | US6159338 Supply of washing liquid in a fractionating multi-stage washer |
| 12/12/2000 | US6159337 Dissolved organic materials control in cellulose pulp production |
| 12/12/2000 | US6159335 Forming aqueous slurry of cellulose fibers; adding debonding agent selected from alum, kaolin, titanium dioxide, zinc oxide, calcium carbonate to cellulose slurry to coat fibers in slurry; forming coated fibers into comminution sheet |
| 12/07/2000 | WO2000073579A1 Screen cylinder for a screw press |
| 12/07/2000 | WO2000073576A1 Bleaching of lignin and process for producing paper |
| 12/07/2000 | WO2000073575A1 Method for avoiding mechanical damage of pulp |
| 12/07/2000 | WO2000073426A1 Isolation and activities of lignin depolymerases |
| 12/07/2000 | CA2375030A1 Isolation and activities of lignin depolymerases |
| 12/07/2000 | CA2374904A1 Bleaching of lignin and process for producing paper |
| 12/06/2000 | CN1275651A Bleaching method of paper-making fiberflax pulp |
| 12/05/2000 | US6156159 Device for mixing of a fluid into a pulp-suspension |
| 12/05/2000 | US6156156 Method of producing pulp using single-stage cooking with formic acid and washing with performic acid |
| 11/30/2000 | WO2000071247A1 Equilibrated tungsten-based polyoxometalate-catalyst systems |
| 11/29/2000 | EP0832323B1 Peroxide bleaching of pulp |
| 11/28/2000 | US6153300 Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicals |
| 11/28/2000 | US6153051 Process control |
| 11/28/2000 | US6153050 Method and system for controlling the addition of bleaching reagents to obtain a substantially constant percentage of pulp delignification across the first bleaching/delignifying stage |
| 11/28/2000 | US6153049 In papermaking |
| 11/28/2000 | US6151931 Effluent shower for pulp washer |
| 11/22/2000 | CN2406968Y Spiral net conveying belt against skid off |
| 11/21/2000 | US6150452 Methods and compositions for treating stickies |
| 11/21/2000 | US6149766 Process for peroxide bleaching of chemical pulp in a pressurized bleaching vessel |
| 11/16/2000 | WO2000068500A1 A process for production of paper materials with improved wet strength |
| 11/16/2000 | WO2000068495A1 Method for bleaching paper pulp |
| 11/16/2000 | WO2000068396A2 Bacillus circulans xylanase mutants |
| 11/16/2000 | DE19920338A1 Bleaching control of a paper fiber pulp suspension uses measurements before and after bleaching with intermediate measurements to control the bleaching stage for optimum whiteness and max use of the bleaching chemicals |
| 11/16/2000 | CA2373135A1 Novel thermostable alkaliphilic xylanase |
| 11/15/2000 | EP1017899A4 Transition-metal substituted tungstoaluminate complexes for delignification and waste mineralization |
| 11/15/2000 | EP0606250B2 A method and device for treating fibre material |
| 11/15/2000 | CN1273560A Process to manufacture stabilized alkali or alkaline earth metal hypobromite and uses thereof in water treatment to control microbial fouling |
| 11/14/2000 | US6146495 Kraft process for the production of wood pulp by adding a copolymer of 1,2-dihydroxy-3-butene antiscalant |
| 11/14/2000 | US6146494 Modified cellulosic fibers and fibrous webs containing these fibers |
| 11/09/2000 | WO2000066835A1 Paper products and a method for applying an adsorbable chemical additive to cellulosic fibers |
| 11/09/2000 | WO2000066833A1 Fluff pulp for absorption products |
| 11/08/2000 | EP1049906A1 Method and apparatus for treating material having poor thermal conductivity |
| 11/08/2000 | CN2404916Y Reactor for preparing bleaching liquid |
| 11/07/2000 | US6143800 Compositions and method for inhibiting organic contaminant deposition in pulp and papermaking systems |
| 11/07/2000 | CA2191567C Individualized cellulosic fibers crosslinked with polyacrylic acid polymers |
| 11/02/2000 | WO2000065148A1 Process for bleaching chemical pulps with low organic halogen compounds content |
| 11/02/2000 | WO2000065147A1 A method for controlling a process for bleaching cellulose pulp |
| 11/02/2000 | WO2000065146A1 Crosslinkable cellulosic fibrous product |
| 11/02/2000 | WO2000065145A1 Cellulose ethers and method of preparing the same |
| 11/02/2000 | EP1047729A1 Composition for bleaching woodpulp and process for its production |
| 10/31/2000 | US6140095 Alkalitolerant xylanases |
| 10/31/2000 | US6139769 Bleaching-active metal complexes |