| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 05/02/2001 | CN1065304C Method for preparing delignified and bleached chemical paper pulps |
| 05/02/2001 | CN1065143C Absorbent structure containing individualized polycarboxylic acid crosslinked fibers |
| 05/01/2001 | US6225275 Activation of oxidoreductases for bleaching fabrics during washing |
| 04/26/2001 | WO2001029309A1 Method of making carboxylated cellulose fibers and products of the method |
| 04/26/2001 | WO2001029308A1 Fibers from plant seeds and use |
| 04/26/2001 | DE19950941A1 Acrylic acid polymers, useful as inhibitors of calcium sulfate deposition in paper pulp and recycled paper treatment, comprises polymer containing acrylic acid monomer |
| 04/25/2001 | EP0842321B1 Method of stabilizing peroxide-containing alkaline bleach liquors for bleaching cellulose and other fibrous materials |
| 04/24/2001 | US6221487 Lyocell fibers having enhanced CV properties |
| 04/24/2001 | US6221209 Purifying chemical pulp, delignification and treating with hydrogen peroxide in alkaline medium in presence of stabilizing agent |
| 04/24/2001 | US6221208 Transporting fiber pulp suspension from a maintenance vessel to bleaching reactor and introducing suspension into bottom part of reactor, heating and pressurizing; pumping pulp into mixer |
| 04/24/2001 | US6221207 Contacting chemical pulp with oxygen first in an upstream reactor vessel and then in a downstream reactor vessel; heating of partially delignified chemical pulp between the upstream and downstream reactors by low pressure steam |
| 04/24/2001 | US6221206 Method for oxygen delignification of a digested pulp |
| 04/19/2001 | WO2001027383A1 Method for minimising the new water use in the water circulation system of a treatment plant |
| 04/19/2001 | CA2387140A1 Method for minimising the new water use in the water circulation system of a treatment plant |
| 04/18/2001 | EP1092762A1 Storage stable compositions comprising mediators, peroxide compounds and pH stabilizers, and their use in enzymatic bleaching systems |
| 04/18/2001 | EP1092058A1 Method for selectively delignifying lignocellulosic materials |
| 04/18/2001 | EP1075563A4 Method for removing wax from a pulp furnish |
| 04/18/2001 | EP0775226B2 Use of concentrate of stabilisers for aqueous bleaching and treating solutions based on hydrogen peroxide and/or other inorganic and/or organic peroxo compounds |
| 04/18/2001 | CN1292053A Method for treating process water |
| 04/18/2001 | CN1292052A Method for removing wax from pulp furnish |
| 04/17/2001 | US6218164 Thermopallium bacteria and enzymes obtainable therefrom |
| 04/17/2001 | CA2185537C Heat treated high lignin content cellulosic fibers |
| 04/17/2001 | CA2170096C A process for treating liquids |
| 04/11/2001 | EP1090183A1 A method of producing a fiber product |
| 04/11/2001 | EP1064082A4 Contaminant dispersants useful in recycling of treated containers |
| 04/11/2001 | CN1291248A Calcium carbonate synthesis method and resulting product |
| 04/11/2001 | CN1291246A Modified cellulosic fibers and fiber webs containing these fibers |
| 04/11/2001 | CN1290786A Method for producing chlorine-free bleached pulp, paper and paper board by using hemp stem |
| 04/10/2001 | US6214976 Chemical method for lignin depolymerization |
| 04/10/2001 | US6214163 Super microfibrillated cellulose, process for producing the same, and coated paper and tinted paper using the same |
| 04/10/2001 | US6213632 Apparatus for treating an aqueous working medium by shearing in annular treatment slots of varying sizes |
| 04/10/2001 | CA2150385C Method and apparatus for bleaching pulp |
| 04/04/2001 | EP1088130A2 Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps |
| 04/04/2001 | EP1088080A1 Cellulase producing actinomycetes, cellulase produced therefrom and method of producing same |
| 04/04/2001 | EP0788568B1 Use of monocomponent cellulase for removing inks, coatings, and toners from printed paper |
| 04/04/2001 | CN1290189A Contaminant dispersants useful in recycling of treated containers |
| 04/03/2001 | US6211400 Sulphinic acid derivatives, method for producing them, and their use |
| 04/03/2001 | US6210801 For making lyocell fiber with enhanced dyeability, less fibrillation |
| 04/03/2001 | US6210532 Means for conveying pulp having differential pressure control |
| 04/03/2001 | US6210527 Pulp bleaching method wherein an ozone bleaching waste stream is scrubbed to form an oxygen containing stream |
| 04/03/2001 | US6210526 Adding, hydrophobized synthetic or natural mineral to preclude dispersion in clear water or in alkaline or neutral fiber-free deinking formulation to treated paper pulp to cause microstickies to be absorbed by mineral and removed |
| 03/29/2001 | WO2001021890A1 Method for modifying cellulose-based fiber material |
| 03/28/2001 | EP1086211A2 Novel mannanases |
| 03/27/2001 | US6207010 Preparation and use of iminodisuccinic acid salts |
| 03/27/2001 | US6207009 High strength paper |
| 03/27/2001 | US6205675 Dehydration machine |
| 03/27/2001 | CA2140563C Method and apparatus for mixing gaseous chemical to fibre suspension |
| 03/22/2001 | WO2001020075A1 Oxidised white liquor in an oxygen delignification process |
| 03/21/2001 | EP1084292A1 Treatment of filtrates from peroxide bleaching of pulp |
| 03/21/2001 | EP1023488A4 Resin-treated mercerized fibers and products thereof |
| 03/21/2001 | EP0786030B1 Washing pulp using an endless support fabric |
| 03/15/2001 | DE19943254A1 Bleichaktive Metallkomplexe Bleaching Active Metal Complexes |
| 03/14/2001 | EP1083173A2 Metal complexes with bleaching activity |
| 03/14/2001 | EP1082486A1 Oxidase process for pulp and dye oxidation |
| 03/14/2001 | EP1082380A1 Fibrous absorbent material and methods of making the same |
| 03/14/2001 | EP1082348A1 Process for preparing a high purity chemical-free microcrystalline cellulose from a chemically produced cellulose |
| 03/14/2001 | EP0856079B1 Supply of washing liquid in a fractionating multi-stage washer |
| 03/08/2001 | WO2001016423A1 Pulping process for corn stover and other nonwood fibrous materials |
| 03/08/2001 | WO2000068396A3 Bacillus circulans xylanase mutants |
| 03/08/2001 | CA2383349A1 Pulping process for corn stover and other nonwood fibrous materials |
| 03/07/2001 | CN1062925C Suspension-treating device |
| 03/01/2001 | WO2001014632A1 Method for bleaching pulp with chlorine dioxide |
| 02/28/2001 | EP1079021A1 Photocatalytic pulp composition, foam using said composition, moulded pulp using said composition and moulded pulp foam using said foam as well as processes for producing said photocatalytic pulp composition, said foam, said moulded pulp and said moulded foam and apparatus for producing said composition |
| 02/28/2001 | EP1078033A1 Metal ligand containing bleaching compositions |
| 02/28/2001 | CN1285437A Optic catalysing paper pulp composition, its foam body and method and apparatus for producing same |
| 02/27/2001 | US6193837 Preparation of brightness stabilization agent for lignin containing pulp from biomass pyrolysis oils |
| 02/27/2001 | US6193406 Method and apparatus for mixing pulp a suspension with a fluid medium with a freely rotatable mixing rotor |
| 02/22/2001 | WO2001012899A1 Method for fixing a mineral filler on cellulosic fibres and method for making a sheet of paper |
| 02/22/2001 | WO2001012897A1 Replaceable wearing surface for a sealing arrangement |
| 02/22/2001 | CA2381429A1 Replaceable wearing surface for a sealing arrangement |
| 02/21/2001 | EP1077286A1 Aldehyde modified cellulose pulp for the preparation of high strength paper products |
| 02/21/2001 | EP1077285A1 Paper prepared from aldehyde modified cellulose pulp and the method of making the pulp |
| 02/21/2001 | EP0946408B1 Treatment of chlorine dioxide generator effluent and feed streams with fixed-resin bed |
| 02/21/2001 | CN1062322C Flocculation-precipitation treatment method and equipment for waste paper deinking waste water |
| 02/20/2001 | CA2185139C Process for treating kaolin clays for pitch control and the treated clays |
| 02/20/2001 | CA2171731C Apparatus for fluffing high consistency wood pulp to optimize reaction with a gaseous bleaching reagent |
| 02/20/2001 | CA2162791C Endless multilayer fabric for densifying paper materials and production process thereof |
| 02/20/2001 | CA2150254C Method of bleaching pulp without using chlorine-containing chemicals |
| 02/20/2001 | CA2064048C Stabilized hydrogen peroxide aqueous solution and process for its preparation |
| 02/17/2001 | CA2316111A1 Aldehyde modified cellulose pulp for the preparation of high strength paper products |
| 02/14/2001 | EP1076132A1 Process for fixing of mineral filler on cellulosic fibres and paper manufacturing process |
| 02/14/2001 | EP1075563A1 Method for removing wax from a pulp furnish |
| 02/14/2001 | CN1284144A Polymeric polycarboxylic acid crosslinked cellulosic fibers |
| 02/13/2001 | US6187170 System for the electrochemical delignification of lignin-containing materials and a process for its application |
| 02/13/2001 | US6187136 Process for increasing the charge on a lignocellulosic material |
| 02/08/2001 | WO2001009432A1 Pulp washing method and plant |
| 02/08/2001 | WO2001002641B1 System for the oxygen delignification of pulp consisting of lignocellulose-containing material |
| 02/08/2001 | CA2373695A1 Pulp washing method and plant |
| 02/07/2001 | CN2418150Y Efficient double-conic-disc furnishing machine |
| 02/06/2001 | US6184271 Absorbent composite containing polymaleic acid crosslinked cellulosic fibers |
| 02/06/2001 | US6183596 Super microfibrillated cellulose, process for producing the same, and coated paper and tinted paper using the same |
| 02/06/2001 | US6182478 Apparatus for cleaning a suspension, preferably a fiber mass suspension |
| 02/01/2001 | WO2001007711A1 Method and apparatus for washing fibre pulp mixture |
| 01/31/2001 | EP1071841A1 Method and apparatus for countercurrent treatment of slurries |
| 01/31/2001 | CN1281917A Decolouring method for plant fibre slurry liquid |
| 01/30/2001 | CA2185547C Preparing individualized polycarboxylic acid crosslinked cellulosic fibers |
| 01/25/2001 | DE19934607A1 Hilfsmittel und Verfahren zur Reinigung und zum Bleichen von Zellulose-Pulpe Tools and methods for cleaning and bleaching of cellulose pulp |
| 01/24/2001 | EP1070784A1 Adjuvant and process for cleaning and bleaching of cellulosic pulp |
| 01/24/2001 | EP1070783A1 Process to optimize the dosage of fixing agent for coated broke pulp |
| 01/24/2001 | EP1070167A1 Chlorine dioxide bleaching with additives |