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)
07/2003
07/31/2003WO2003062526A1 Method for bleaching mechanically defibered pulp
07/31/2003WO2003061550A2 Novel catalytic activities of oxidoreductases for oxidation and/or bleaching
07/31/2003WO2002036875A9 Process for producing microcrystalline cellulose with a desired dp
07/31/2003US20030141028 Supplying cellulose to jet drier; absorbers
07/31/2003US20030140519 Drying system for producing dried singulated cellulose pulp fibers
07/31/2003CA2514475A1 Novel catalytic activities of oxidoreductases for oxidation and/or bleaching
07/30/2003EP1330571A2 Method for reducing impurities in cellulose fibers for manufacture of fiber reinforced cement composite materials
07/30/2003EP0545958B2 A process for hydrolyzing hemicellulose by enzymes produced by trichoderma reesei
07/30/2003CN1433473A Modification of polysaccharide containing materials
07/29/2003US6599390 Process for loading fibers with calcium carbonate in a plurality of reactors
07/29/2003US6599326 Inhibition of pulp and paper yellowing using hydroxylamines and other coadditives
07/24/2003US20030139714 Include absorbent material and fibrous material containing activating agent; fibrous material releases activating agent upon stimulation with activator, which causes polymer to become superabsorbent polymer
07/23/2003CN1432087A Alkaline pulp having low average degree of polymerization values and method of producing same
07/23/2003CN1115437C Method for all chlorine free bleaching paper pulp by biological tech
07/22/2003US6596033 Resistant to fibrillation under wet abrasion; low denier; pebbled surface as seen at high magnification and having a variable cross section and diameter along and between fibers
07/17/2003US20030131958 Ozonization under acidic conditions; acidic wash
07/17/2003US20030131957 Hydrolyzing with active oxygen in an acidic environment in a one step process; product has a greater color lightness
07/16/2003EP1165880B1 Method for manufacturing bleached mechanical and chemithermomechanical pulp
07/16/2003CN1114732C Production of soft paper products
07/16/2003CN1114731C Papermaking pulp-liquor separating technology and diffusion washing single net vacuum filter press thereof
07/16/2003CA2415916A1 Dried singulated crosslinked cellulose pulp fibers and process and system for production
07/15/2003US6592717 Tensile strength
07/15/2003CA2063352C Cloning and expression of acetyl xylan esterases from fungal origin
07/09/2003EP1325961A1 A process for the production of crystalline xylose
07/09/2003EP1058751B1 Cotton linter tissue products and method for preparing same
07/09/2003CN1114014C Method for raising paper pulp yield and its device
07/08/2003US6590120 Reacting alkali or earth alkali metal salt of maleic acid with N-substituted diethanolamine, in which two ethanol groups of diethanolamine react while substituent is unreactive with maleic acid salt
07/08/2003US6589387 Immediate improvement of dewatering on paper machine; does not negatively affect web formation
07/03/2003US20030124710 Oxidizing enzymes in the manufacture of paper materials
07/03/2003US20030121868 Control of development of biofilms in industrial process water
07/03/2003US20030121625 Method for bleaching mechanical and chemithermomechanical pulp g
07/03/2003US20030121624 Process and device for loading fibers with calcium carbonate
07/03/2003US20030121623 Polycarboxylic acid crosslinked cellulosic fibers
07/02/2003EP1322814A1 Method for bleaching paper pulp
07/02/2003CN1427870A Method and composition for dispersing hydrophobic particles in aqueous suspensions
07/02/2003CN1427117A Telechnology of multioxometallate electro chemical bleaching chemical pulp and fiber
07/01/2003US6586622 Sulphinic acid derivatives, method for producing them, and their use
07/01/2003US6585901 Method of draining water from low-consistency water-fiber suspensions
06/2003
06/26/2003WO2003052201A1 Novel method for the chlorine-free enzymatic bleaching of high-quality pulps obtained from herbaceous or shrub plants
06/26/2003WO2003052200A2 Process for modifying wood pulp fiber morphology
06/26/2003WO2003052105A1 Cellulase preparations containing reducing agent and method of processing fiber
06/26/2003WO2003051500A1 Static mixer and static mixer component
06/26/2003US20030116289 Cellulose fiber-based compositions and their method of manufacture
06/25/2003EP0767270B1 Method for inhibiting pitch troubles
06/25/2003CN2557568Y Pulp black liquor separator
06/24/2003US6582560 Treating a fibrous web prior to the finishing operation at a pulp mill with a water insoluble chemical additive
06/24/2003US6582557 Fibrous composition including carboxylated cellulosic fibers
06/19/2003US20030111193 Forming a three-dimensional twisted fiber by spray drying and flash drying, without the aid of a chemical curing agent
06/18/2003EP1023119B1 Method and apparatus for introduction of a first fluid into a second fluid
06/17/2003US6579415 Method of increasing the wet strength of a fibrous sheet
06/17/2003US6579414 Cellulosic fibers covalently coupled to a carboxylating agent through an ester bond, wherein the carboxylating agent is a polycarboxylic acid having one carboxyl group separated from second group by either two or three carbon atoms
06/17/2003US6579412 Low consistency cellulosic pulp slurry is mixed with ozone under high shear
06/17/2003US6579411 A method of bleaching cellulose pulp with ozone includes pumping cellulose pulp in form of a fiber suspension having a consistency range of 5 to 25% with a high-consistency pump to a fluidizing Mixture in which oxygen and ozone containing gas
06/12/2003WO2003048663A2 Method and device for compressing ozone-containing gas for an ozone pulp bleaching process
06/12/2003WO2003048450A1 Recycled fibre bleaching
06/12/2003WO2003048449A1 Bleaching stage using xylanase with hydrogen peroxide, peracids, or a combination thereof
06/12/2003WO2003048448A1 Method and system for the treatment of pulp prior to ozone bleaching
06/12/2003WO2002052100A3 Alkaline extraction stages comprising xylanase
06/12/2003CA2436765A1 Bleaching stage using xylanase with hydrogen peroxide, peracids, or a combination thereof
06/11/2003EP0851914B1 Purified mannanase from bacillus amyloliquefaciens and method of preparation
06/11/2003CN1423717A Paper making processes using enzyme and polymer compositions
06/05/2003WO2003046169A2 Xylanases with enhanced thermophilicity and alkalophilicity
06/05/2003US20030103755 Optical fiber harness
06/05/2003US20030102094 Method in the bleaching of pulp and a device for the bleaching of pulp
06/05/2003CA2435527A1 Xylanases with enhanced thermophilicity and alkalophilicity
06/04/2003EP1316639A1 Use of ozone for increasing the wet strength of paper and nonwoven
06/04/2003EP1315791A1 Enzyme compositions in tablet form
06/04/2003EP0946810B1 Crosslinked cellulose fibers, a fiber sheet, an absorbent product and method for increasing the strength of compositions containing high-bulk fibers
06/04/2003CN1110601C Method of making pulp using single-step cooking with formic acid and washing with formic acid containing performic acid
06/03/2003US6572919 Crosslinkable cellulosic fibrous product
05/2003
05/30/2003WO2002099023A3 Enzymatic systems for generating active oxygen species for reacting with other precursors to obtain oxidation and/or bleaching
05/28/2003EP1313830A1 Use of percarbamic acids and diacyl percarbamates and precursors therefor
05/28/2003EP0951599B1 Treatment of pulp with a chelating agent without using a bleaching tower
05/28/2003EP0827486B1 Stabilized alkali or alkaline earth metal hypobromite and process for its production
05/28/2003EP0787231B1 Polyoxometalate delignification and bleaching
05/28/2003CN2552996Y Straw pulp drying-separating machine
05/27/2003US6569286 For delignification wood or non-wood pulp using an agglomerated bleach activator of a crystalline powder of tetracetylethylenediamine which reacts with agitated hydrogen peroxide
05/27/2003US6569284 Provides significant reduction in filtrate volumes and amounts of absorbable halide, color, and oxygen demand in the effluent; brightness; viscosity
05/22/2003WO2003042451A2 Lignocellulose product
05/22/2003US20030096394 Laccase activity enhancers
05/22/2003US20030094251 For bleaching lignin-containing materials/pulps; papermaking
05/22/2003US20030093916 Process for producing dried singulated cellulose pulp fibers using a jet drier and injected steam and the product resulting therefrom
05/21/2003EP1311722A1 Two-stage chlorine bleaching process with filtrate recirculation
05/21/2003EP1311717A2 Alkaline pulp having low average degree of polymerization values and method of producing the same
05/21/2003CN1419621A Pitch and stickies control in pulp and papermaking processes
05/20/2003US6566114 Mannanases
05/20/2003CA2224685C Method and apparatus for treating pulp in an indirect heat exchanger after pulping
05/20/2003CA2072479C Batch process for preparing kraft pulp
05/15/2003US20030091754 Submitting to an electrical discharge in presence of a gaseous mixture of a carrier and oxidizer and/or reducing agent, e.g., carboxylation; wet strength, adhesion, storage stability, absorption; nonwoven fabrics; tissue; paper
05/15/2003US20030089477 Comprises first submerging pressure sensitive adhesive into whitewater, water, and/or pulp slurry
05/15/2003US20030089473 Bleaching pulp
05/15/2003US20030089472 For oxidation of lignin-containing materials (wood pulp)
05/15/2003US20030089465 Pulping, pressing, decompacting, and feeding pulp into pre-heated reactor, cooking pulp of hydrolyzed cellulose to polymerize, depressurizing, injecting water, filtering, deaggregating with shear force, then drying
05/14/2003CN1108401C Pulp containing cellulose and moulded product made from the same
05/13/2003US6562743 Absorbent structures of chemically treated cellulose fibers
05/13/2003US6562195 Forming cellulose aldehyde by controlled oxidation of cellulose with aldehyde; wet strength
05/13/2003US6562192 Absorbent articles with absorbent free-flowing particles and methods for producing the same
05/08/2003WO2003038184A1 Bleached, mechanical paper pulp and the production method therefor
05/08/2003US20030085008 Methods to enhance pulp bleaching and delignification
05/07/2003EP1308556A1 Lignocellulose product
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