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)
05/2003
05/07/2003EP1308555A2 Dissolved solids control in pulp production
05/07/2003EP1308554A2 Dissolved solids control in pulp production
05/07/2003EP1280859A4 Method and composition for dispersing hydrophobic particles in aqueous suspensions
05/07/2003EP1244851B1 Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity
05/05/2003WO2002051944A1 Black dye mixtures of fibre-reactive azo dyes and the use thereof for dyeing fibre material containing hydroxy and/or carbonamide groups
05/05/2003CA2428054A1 Black dye mixtures of fibre-reactive azo dyes and their use for dyeing hydroxyl-and/or caroxamido-containing fiber material
05/02/2003EP1305469A2 New process for pre-treating cellulosic fibers and cellulosic fiber blends
05/01/2003WO2003035979A1 Method for manufacturing filler containing chemical pulp
05/01/2003WO2003035972A1 Oxidizing enzymes in the manufacture of paper materials
05/01/2003WO2002095127A3 Use of lipolytic enzymes for stickies control
05/01/2003WO2002055679A3 Thermostable lipolytic enzyme variant
05/01/2003US20030083491 Hypochlorite free method for preparation of stable carboxylated carbohydrate products
05/01/2003US20030080044 Dewatering device
05/01/2003CA2463669A1 Method for manufacturing filler containing chemical pulp
05/01/2003CA2461447A1 Oxidizing enzymes in the manufacture of paper materials
04/2003
04/30/2003CN2547756Y Pulp thickener
04/30/2003CN1107140C Method for bleaching medium thick paper pulp by hydrogen peroxide for medum-small paper mill
04/29/2003US6554958 Under high pressure, in the presence of a polymer of hydroxyacrylic acid or acid salt or lactone and of potassium hydroxide, sodium hydroxide, or alkali metal or alkaline-earth metal carbonate
04/29/2003US6553593 Plate diffuser for treating comminuted cellulosic fibrous material
04/23/2003EP1304412A2 Process for bleaching lignocellulosic pulp
04/23/2003EP1303666A1 Processes of reducing contamination from cellulosic suspensions
04/23/2003EP1165879B1 Method and apparatus for treating pulp
04/23/2003CN1413279A Method of draining water from low-consistency water-fibre suspensions
04/23/2003CN1413277A New process for pre-treating cellulosic fibers and cellulosic fiber blends
04/17/2003US20030070778 Method and apparatus for adjusting chemical dosage of pulp processing stage
04/17/2003US20030070777 Improving the bleaching process by stabilizing the chelated transition metal ions in slurry
04/17/2003US20030070776 Treating pulp with a cold caustic solution, wet laying to form sheet, drying and cutting to a desired shape; making baby diapers, incontinence pads, and wound dressings
04/16/2003EP1302589A2 Method and apparatus for adjusting chemical dosage of pulp processing stage
04/16/2003EP1244840A4 Bleaching pulp with high-pressure o 2?
04/16/2003EP1009522B1 Method and device for treating an aqueous working medium with at least one treating fluid
04/16/2003EP0698139B1 Dissolved solids control in pulp production
04/16/2003EP0679183B1 Enhancement of enzyme reactions
04/16/2003EP0670928B2 Process for delignification of lignocellulose-containing pulp
04/16/2003CA2408000A1 Method and apparatus for adjusting chemical dosage of pulp processing stage
04/15/2003US6548558 Reuse of paper, paperboard
04/15/2003US6547923 Process for bleaching medium consistency pulp with ozone using a pressurized fluidizing mixer
04/10/2003WO2002072951A3 Method for treating pulp with water insoluble chemical additives
04/09/2003EP1299595A1 Method for preparing pulp from cornstalk
04/09/2003CN1408943A Vertical pulp dewatering machine
04/08/2003US6545147 Bleaching-active metal complexes
04/03/2003WO2002057541A3 Use of xylanase in pulp bleaching
04/03/2003US20030062138 Method for brightening mechanical pulps
04/02/2003EP1297217A2 Methods to control organic contaminants in fiber suspensions
04/02/2003CN1407172A Paper pulp production and system device with non-wood as raw materials
04/02/2003CN1407171A Bamboo fibre process
04/02/2003CN1104524C Dissovlved solids control in pulp production
04/01/2003US6540872 Eliminate metal ions and reducing the peroxide consumption
04/01/2003US6540870 By introducing carbon dioxide to the pulp suspension; for the production of paper or board
03/2003
03/27/2003WO2002088187A3 Method for the production of woodpulp
03/27/2003US20030056295 Process temperature in first ClO2 bleaching stage elevated to above 91 degrees C. and time extended to more than 90 minutes. A major reduction of organically bound Cl of up to 50% have been shown without a corresponding increase in OCl.
03/26/2003EP1294980A2 Aldehyde donors for stabilizing peroxides in papermaking applications
03/26/2003EP1125016B1 Method and apparatus for the thickening of fiber suspensions
03/26/2003EP0934441B1 Readily defibered pulp products and method of their manufacture
03/26/2003CN1103833C Method for controlling oxygen delignification of pulp
03/26/2003CN1103832C Treatment of pulp with a chelating agent without using a bleaching tower
03/25/2003US6537425 Process for loading fibers with calcium carbonate
03/25/2003CA2081002C Peroxide brightening of mechanical pulps
03/25/2003CA2035698C Chlorine-free bleaching method for dissolving-grade pulps
03/20/2003WO2003023142A1 Enhancing laccase activity using pro-oxidants and pro-degradants
03/20/2003WO2003023134A1 Laccase activity enhancers for pulp bleaching
03/20/2003WO2003023133A1 Bio-bleaching of pulp using laccase, mediator, and chain transfer agent
03/20/2003WO2003023043A1 Laccase activity enhancers
03/20/2003WO2002072499A3 Fiber reinforced cement composite materials using chemically treated fibers with improved dispersibility
03/20/2003US20030054167 Highly carboxylated cellulose fibers and process of making the same
03/20/2003US20030051842 Water content of 3 wt % or less, the average fiber diameter of 5 to 300 mu m and the average fiber length of 0.1 to 70 mm is incorporated into 5 to 60 wt % of titanium oxide.
03/20/2003US20030051836 Use of certain lipolytic enzymes such as cutinases and lipases in the manufacture of paper
03/20/2003US20030051834 Use of a catalytic amount of a hindered cyclic oxammonium salt as a primary oxidant and a peracid and halide salt as a secondary oxidant in an aqueous environment.
03/20/2003US20030051833 Photocatalytic pulp composition, photocatalytic pulp foam using said photocatalytic pulp composition, molded photocatalytic pulp using said photocatalytic pulp composition and molded photocatalytic pulp foam using said photocatalytic pulp foam as well as process for producing said photocatalytic pulp composition, said photocatalytic pulp foam, said molded photocatalytic pulp and said molded photocatalytic pulp foam and apparatus for producing said photocatalytic pulp composition
03/18/2003US6533898 Softened comminution pulp
03/18/2003US6533895 Apparatus and method for chemically loading fibers in a fiber suspension
03/13/2003WO2003021033A1 Enzymatic treatment of pulp to increase strength
03/13/2003WO2002075045B1 Method for the enzymatic control of pitch deposits formed during paper pulp production using an esterase that hydrolyses triglycerides and sterol esters
03/13/2003US20030047295 Bio-bleaching of pulp using laccase, mediator, and chain transfer agent
03/13/2003US20030046984 Rapid triglyceride assay for use in pulp pitch control
03/12/2003EP1291431A1 Endoglucanase nce5 and cellulase preparations containing the same
03/12/2003CN1402803A Fibers from plant seeds and use
03/12/2003CN1401848A Paper pulp bleaching process
03/12/2003CN1102974C Multi component system for modifying, degrading or bleaching lignin, lignin containing materials and processes for its use
03/11/2003CA2136068C Process for producing paper or paperboard with increased strength from mechanical pulp
03/06/2003WO2003018908A1 Method in a paper or pulp process to control the chemical state of the pulp and circulation water system
03/06/2003WO2003018907A1 Seal at press rollers
03/06/2003US20030041983 Method for producing cellulose fiber having improved biostability and the resulting products
03/04/2003US6528163 Lyocell fiber from sawdust pulp
03/04/2003US6527915 Proteins for use as pitch and stickies control agents in pulp and papermaking processes
02/2003
02/27/2003WO2003016356A1 Highly carboxylated cellulose fibers and process of making the same
02/27/2003WO2002088289A3 Use of metal complex compounds as oxidation catalysts
02/27/2003WO2001088236A3 Alkaline pulp having low average degree of polymerization values and method of producing the same
02/27/2003US20030038085 Using urea sulfate, urea hydrochloride, triethanolamine sulfate, and triethanolamine hydrochloride; free of sulfuric acid, formic acid, and acetic acid; corrosion resistance, less harmful effluents
02/27/2003US20030037896 Paper products and a method for applying a dye to cellulosic fibers
02/27/2003US20030037892 Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp
02/27/2003US20030037891 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
02/27/2003US20030037890 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
02/27/2003CA2456207A1 Highly carboxylated cellulose fibers and process of making the same
02/26/2003EP1285110A1 Lyocell fibers
02/26/2003EP0923635B1 Metal ligand containing bleaching compositions
02/26/2003EP0866896B1 A pulp-dewatering roll press
02/25/2003US6524437 Process for peroxide bleaching wherein the concentrations of Mn and Fe are monitored and maintained
02/25/2003US6524435 Method and composition for dispersing hydrophobic particles in aqueous suspensions
02/25/2003US6524348 Method of making carboxylated cellulose fibers and products of the method
02/20/2003WO2003014029A2 Control of development of biofilms in industrial process water
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