Patents
Sitemap › D21 - Paper-making; Production of cellulose › D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materials; Regeneration of pulping liquors; Apparatus therefor › D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265)
05/1998
05/07/1998WO1998019002A1 Control scheme for rapid pulp bleaching
05/07/1998WO1998019001A1 Treatment process for cellulosic fibers
05/07/1998CA2267143A1 Treatment process for cellulosic fibers
05/06/1998EP0839226A1 Method and device for treating a pulp suspension
05/06/1998CN1180769A Flocculation-precipitation treatment method and equipment for waste paper deinking waste water
05/05/1998US5746888 Methods for inhibiting organic contaminant deposition in pulp and papermaking systems
04/1998
04/30/1998WO1998017857A1 Removal of metals from treatment fluids in a cellulose pulp mill
04/30/1998WO1998017856A1 Readily defibered pulp products and method of their manufacture
04/29/1998EP0838010A2 High pressure gas exchanger
04/29/1998EP0837968A1 Auxiliary paper-producing aid with recurring succinyl units
04/29/1998EP0805233A4 Method of treating a fibrous material with a chemical reagent and an apparatus for carrying out the said method
04/29/1998EP0725854B1 Aminoalkane diphosphonic acids in pulp bleaching
04/28/1998US5744043 Processes for reducing contamination of cellulosic liquors
04/28/1998US5744003 Applying effective pitch retarder consisting of blend of guar hydroxypropyltriammonium chloride and styrene-maleic anhydride copolymer to a feedpoint in pulp or papermaking
04/23/1998WO1998016683A1 Method for delignification and bleaching of chemical pulp
04/23/1998WO1998016682A2 Process for the co-production of dissolving-grade pulp and xylan
04/23/1998WO1998016462A1 Treatment of chlorine dioxide generator effluent and feed streams with fixed-resin bed
04/23/1998CA2267985A1 Process for the co-production of dissolving-grade pulp and xylan
04/22/1998EP0836495A1 Delivery of oxygen-supersaturated physiologic solutions
04/22/1998CN2279373Y Black liquor squeezer
04/22/1998CN1179492A Method for refining composite body paper
04/21/1998US5741693 Protease isolated from pure cultures for use in detergents
04/21/1998US5741399 Dilution and water extraction cycles yield separated filtrates having varying degrees of purity with only the cleanest filtrates being reused for further dilution
04/21/1998US5741398 Heating at alkalinine ph
04/16/1998WO1998015689A1 Improved method of softening pulp and pulp products produced by same
04/16/1998WO1998015633A1 Chrysosporium cellulase and methods of use
04/16/1998WO1998015619A1 High molecular weight trichoderma cellulase
04/16/1998CA2268384A1 Chrysosporium cellulase and methods of use
04/16/1998CA2236333A1 Improved method of softening pulp and products produced by same
04/15/1998CN1179189A System and method for recycling materials
04/09/1998WO1998014657A1 Oxidation of disturbing metal ions in bleaching processes
04/08/1998EP0834051A1 Method and apparatus for treating material which conducts heat poorly
04/07/1998US5736384 Thermostable xylanase
04/07/1998US5736007 Method of liquor removal from particulate solids
04/07/1998US5736004 Adjusting chemical application in response to pulp brightness and/or lignin content
04/07/1998US5735934 Method for delivering a gas-supersaturated fluid to a gas-depleted site and use thereof
04/02/1998WO1998013545A1 Polyanhydride cross-linked fibrous cellulosic products and process for their preparation
04/02/1998DE19639110A1 Paper fibre pulp processing
04/01/1998EP0832323A1 Peroxide bleaching of pulp
04/01/1998EP0832322A1 Method for oxygen delignification of paper pulp
04/01/1998EP0832321A1 Drum supported by support rollers for washing fibre material
04/01/1998EP0832320A1 Process for preparing reduced odor and improved brightness individualized, polycarboxylic acid crosslinked fibers
04/01/1998EP0832139A1 Polymers, their preparation and their use
04/01/1998EP0673454B1 Apparatus for filtering suspensions
04/01/1998EP0670927B1 Method and pulp washing machine for washing of pulp or similar material
04/01/1998CN1177639A Modification of xylanase to improve thermophilicity, alkophilicity and thermostability
03/1998
03/30/1998CA2213873A1 Polysaccharides substituted with polycarboxylated moieties
03/25/1998EP0831170A2 Improved process for recycling bleach plant filtrate
03/25/1998EP0831169A2 Stabilizers for use in oxygen-based treatments of cellulose materials
03/24/1998US5730935 Supplying gas into liquid
03/23/1998CA2216084A1 Stabilizers for use in oxygen-based treatments of cellulosic materials
03/19/1998WO1998011295A1 Method for bleaching paper pulp
03/19/1998WO1998011294A1 Delignification process
03/19/1998CA2265566A1 Method for bleaching paper pulp
03/18/1998EP0513140B2 A process for the bleaching of chemical pulp
03/18/1998CN1176673A Peroxide bleaching process for cellulosic and lignocellulosic material
03/18/1998CN1176630A Plant for producing hydrogen peroxide in situ in a paper mill
03/18/1998CN1176629A Apparatus for feeding hydrogen peroxide to a processing unit in an industrial facility
03/18/1998CN1176628A Plant for producing hydrogen peroxide
03/17/1998US5728264 Descaling a pulp bleaching process and caustic material added to acid pulp, washing
03/17/1998US5728263 Method for inhibiting enzymatic decomposition of peroxide in the treating of fiber pulp using dialdehydes and acetals
03/11/1998EP0828026A1 Process for cleaning a pulp of primary fibres
03/11/1998EP0828002A2 Modification of xylanase to improve thermophilicity, alkophilicity and thermostability
03/11/1998EP0827533A2 Enzyme and microorganism degrading rhamnogalacturonane ii
03/11/1998EP0827486A1 Stabilized alkali or alkaline earth metal hypobromite and process for its production
03/11/1998CN1037708C Process for making highly finished kraft paper
03/10/1998US5725779 Conditioning soils
03/05/1998WO1998009017A1 Method of agglomerating stickies in an aqueous slurry of wastepaper
03/04/1998EP0826087A1 Fiber suspension thickener having improved discharge consistency
03/04/1998EP0826086A1 Method and equipment for heating and pressuring a fibre pulp suspension during transportation to a bleaching reactor
03/04/1998EP0826085A1 A method for incorporating cellulose esters into cellulose by immersing cellulose in an acid-dope solution
03/04/1998EP0778908A4 Thin mat washing of cellulosic pulp
03/04/1998EP0742855B1 Apparatus for treating pulp
03/04/1998EP0720676A4 Improved method for bleaching lignocellulosic pulp
03/04/1998CN1174912A Intermittent air-compression dehydrating technology for waste liquor pulp im paper making
03/03/1998US5723600 Method for incorporating cellulose esters into cellulose by immersing cellulose in an acid-dope solution
03/03/1998US5723021 Method for inhibiting deposition in pulp and papermaking systems using a composition comprising of polyvinyl alcohol, gelatin and cationic polymer
03/03/1998US5722264 Single roll displacement wash press
02/1998
02/26/1998WO1998007922A1 Method for lowering the level of oxalic acid
02/26/1998WO1998003626A3 Metal ligand containing bleaching compositions
02/25/1998EP0825294A1 Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system
02/25/1998EP0825293A1 Enhanced removal of hydrophobic contaminants from water clarification systems
02/25/1998EP0825254A2 Alkalophilic Bacillus sp. AC13 and xylanase obtainable therefrom
02/25/1998EP0824617A1 A method for treating wood with bacteria
02/20/1998CA2213367A1 Enhanced removal of hydrophobic contaminants from water clarification systems
02/19/1998WO1998006892A1 Enzymatic freeness enhancement
02/19/1998WO1998001616A3 Stock washer for washing, thickening and classifying solids
02/18/1998EP0824160A1 Process for the manufacture of paper making pulp
02/18/1998CN1037464C Pulp fibre washing appts. and method for washing the same
02/12/1998WO1998005819A1 Pitch control composition
02/12/1998WO1998005818A1 Multi-component system for modifying, decomposing, or bleaching lignin, lignin-containing materials or similar substances and process for its application
02/11/1998EP0823005A1 Process for controlling the deposit of adhesive impurities from paper material suspensions
02/11/1998EP0823003A1 Ambient temperature pulp bleaching with peroxyacid salts
02/11/1998EP0665912B1 Improved ozone bleaching
02/05/1998WO1998004775A1 Use of complexing agents for cellulose and wood bleaching, paper production and used paper deinking
02/05/1998WO1998004774A1 Method and apparatus for bleaching wood pulp, especially containing waste paper
02/05/1998WO1998004620A1 Pitch control composition based on blend of derivatized cationic guar and styrene maleic anhydride copolymer
02/05/1998DE19631131A1 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,
02/05/1998CA2260935A1 Method and apparatus for bleaching wood pulp, especially containing waste paper
02/04/1998EP0822288A2 Continuous digester for the implementaion of dissolved solids profiling
1 ... 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 ... 103