| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 11/18/1997 | US5688369 Dispersion of fiber pulp |
| 11/18/1997 | US5688368 Method for cooling and ozone bleaching wood pulp |
| 11/18/1997 | US5688367 Bleaching a lignocellulose pulp for paper |
| 11/12/1997 | EP0806521A2 Method of making an ultra soft, high basis weight tissue |
| 11/12/1997 | EP0805794A1 Use of tri-acids based on alkoxylated tertiary amines as complex formers |
| 11/11/1997 | US5685984 Fiber suspension thickener having improved discharge consistency |
| 11/11/1997 | US5685953 Bleaching papermaking pulps |
| 11/11/1997 | US5685342 Apparatus for mixing a first fluid into a second fluid |
| 11/09/1997 | CA2204453A1 Method of rendering wood pulp keratotic and a method of making an ultra soft, high basis weight tissue and product produced thereby |
| 11/06/1997 | WO1997036037A3 Aldehyde-modified cellulosic fibers for paper products having high initial wet strength |
| 11/05/1997 | EP0805233A1 Method of treating a fibrous material with a chemical reagent and an apparatus for carrying out the said method |
| 11/05/1997 | EP0804646A1 Use of ethyleneamines in the removal of lignin |
| 11/05/1997 | CN1163958A Technique and equipment for separating papermaking pulping fibre from waste liquor |
| 11/04/1997 | USH1690 Process for bleaching kraft pulp |
| 11/04/1997 | US5683911 Method of enhancing the delignification and/or bleaching of pulp |
| 11/04/1997 | US5683654 Process to manufacture stabilized alkali or alkaline earth metal hypobromite and uses thereof in water treatment to control microbial fouling |
| 11/04/1997 | CA2121969C Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicals |
| 11/04/1997 | CA2013321C Method of producing fluff pulp with improved defibration properties |
| 10/30/1997 | WO1997040087A1 Process for preparing water-soluble, polyamino polycarboxylic acids |
| 10/29/1997 | EP0803007A1 A method and apparatus for bleaching secondary fibres |
| 10/29/1997 | EP0682695B1 Oxidising agents |
| 10/29/1997 | EP0478762B2 Method and device for separating a fibre suspension |
| 10/29/1997 | CN2265994Y High-efficiency paper pulp squeezer |
| 10/28/1997 | US5681732 Cloning and expression of acetyl xylan esterases from fungal origin |
| 10/28/1997 | US5681427 Apparatus for treating pulp produced by solvent pulping |
| 10/23/1997 | WO1997039188A1 Method of preparation of a cellulosic pulp, cellulosic pulp to be used in absorbent products, and such absorbent product |
| 10/23/1997 | WO1997039180A1 Method for oxygen delignification of paper pulp |
| 10/23/1997 | WO1997039179A1 Method for bleaching of lignocellulosic fibers |
| 10/23/1997 | CA2251664A1 Method for bleaching of lignocellulosic fibers |
| 10/23/1997 | CA2224713A1 Method for oxygen delignification of paper pulp |
| 10/22/1997 | EP0802275A1 Process to improve the whiteness of paper pulp |
| 10/22/1997 | EP0712453B1 Method for ozone bleaching paper pulp |
| 10/21/1997 | US5679261 Using diallyldimethylammonium chloride cationic polymer having vinyl alkoxysilane component as coagulant |
| 10/21/1997 | CA1339504C Oxygen delignification and enzyme treatment |
| 10/16/1997 | DE19614587A1 Verfahren und Bleichlösung zum Bleichen von cellulosischen Faserstoffen Procedures and bleaching solution for bleaching of cellulosic fibers |
| 10/15/1997 | EP0801170A1 Process for the delignification and/or bleaching of a paper pulp |
| 10/15/1997 | EP0801169A1 Process for the delignification and bleaching of chemical paper pulp |
| 10/15/1997 | EP0800596A1 Bleaching of filled paper |
| 10/12/1997 | CA2202445A1 Process for the delignification and/or bleaching of a paper pulp |
| 10/09/1997 | WO1997036934A1 Process for fluorinating cellulosic materials and fluorinated cellulosic materials |
| 10/09/1997 | WO1997036933A1 Process for fluorinating cellulosic materials and fluorinated cellulosic materials |
| 10/09/1997 | CA2250122A1 Process for fluorinating cellulosic materials and fluorinated cellulosic materials |
| 10/08/1997 | EP0799307A1 An enzyme preparation with cellulytic activity |
| 10/08/1997 | EP0799296A2 Use of hydroxyalkylaminocarboxylic acids as complexing agents |
| 10/07/1997 | CA2165347C 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 |
| 10/02/1997 | WO1997036052A2 Paper products having wet strength from aldehyde-functionalized cellulosic fibers and polymers |
| 10/02/1997 | WO1997036046A1 Absorbent cellulosic material and production thereof |
| 10/02/1997 | WO1997036042A1 Oxygen delignification of pulp in two stages |
| 10/02/1997 | WO1997036041A1 Multicomponent system for changing, reducing or bleaching lignin, lignin-containing materials or similar substances as well as processes for its application |
| 10/02/1997 | WO1997036040A1 Ozone-bleached organosolv pulps |
| 10/02/1997 | WO1997036039A1 A multicomponent system for changing, degrading or bleaching lignin, lignin-containing materials or similar substances and processes for its use |
| 10/02/1997 | WO1997036037A2 Aldehyde-modified cellulosic fibers for paper products having high initial wet strength |
| 10/02/1997 | WO1997027358A3 Oxygen delignification of medium consistency pulp slurry |
| 10/02/1997 | DE19612194A1 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, |
| 10/02/1997 | DE19612193A1 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, |
| 10/02/1997 | CA2240129A1 Absorbent cellulosic material and production thereof |
| 10/01/1997 | EP0797703A1 Peroxide bleaching process for cellulosic and lignocellulosic material |
| 10/01/1997 | EP0797702A1 High efficiency vessels for bleaching lignocellulosic, cellulosic and synthetic polymeric fibrous materials |
| 10/01/1997 | EP0797502A1 Dewatering apparatus |
| 10/01/1997 | CN1160791A Biological ink-removing process for regenerating used paper |
| 09/30/1997 | US5672279 Solubilizing calcium carbonate |
| 09/30/1997 | US5672247 Control scheme for rapid pulp delignification and bleaching |
| 09/30/1997 | US5672245 Rejected flow from cooking pulp consisting of knots is returned to chip chute after concentration and washing |
| 09/30/1997 | CA2053035C Chlorine-free wood pulps and process of making |
| 09/25/1997 | WO1997035062A1 Mixtures of reducing-action sulphur compounds and organic corrosion inhibitors and their use as corrosion-inhibiting bleaching or reducing agents |
| 09/25/1997 | WO1997034828A1 Method and apparatus for delivering a variable flow of hydrogen peroxide |
| 09/25/1997 | WO1997034827A1 Stabilized alkali or alkaline earth metal hypobromite and process for its production |
| 09/25/1997 | DE19610745A1 Mischungen aus reduzierend wirkenden Schwefelverbindungen und organischen Korrosionsinhibitoren und ihre Verwendung als Korrosionshemmende Bleich- oder Reduktionsmittel Mixtures of reducing sulfur compounds, and organic corrosion inhibitors and their use as corrosion inhibiting bleach or reducing agent, |
| 09/25/1997 | CA2221927A1 Stabilized alkali or alkaline earth metal hypobromite and process for its production |
| 09/24/1997 | EP0796369A2 Method for pressurized peroxide bleaching |
| 09/24/1997 | EP0796368A1 Method and apparatus for treating solid, fluid or gaseous material of combinations thereof, especially pulp suspensions, on a screen or filter surface |
| 09/24/1997 | CN2263126Y 洗浆机 Washer |
| 09/18/1997 | WO1997034044A1 A method for incorporating cellulose esters into cellulose by immersing cellulose in an acid-dope solution |
| 09/17/1997 | CN1159842A Treatment of chemical pulp with a chelating agent and an oxidizing agent in connection with bleaching |
| 09/17/1997 | CN1159841A Production of soft paper products from old newspaper |
| 09/16/1997 | US5667642 Pulp slurry-handling press roll and twin and single roll slurry handling presses |
| 09/16/1997 | US5667637 Paper and paper-like products including water insoluble fibrous carboxyalkyl cellulose |
| 09/16/1997 | US5667634 Catalyzed hydrolysis of resin esters, triglycerides |
| 09/10/1997 | EP0793749A1 Processes for reducing contamination of cellulosic liquors |
| 09/10/1997 | EP0690938B1 A method for fiber loading a chemical compound |
| 09/09/1997 | US5665204 Method for de-inking printed waste paper by the washing process using an alkoxylated nonionic surfactant |
| 09/04/1997 | WO1997032077A1 Process for sanitizing post-consumer paper fibers and product formed therefrom |
| 09/03/1997 | EP0792395A1 Method to regenerate gas mixture in ozone-bleaching process |
| 09/02/1997 | US5662775 Countercurrent cooking zone at first level and extraction screen at second level |
| 08/27/1997 | EP0791685A2 Procedure for adding a filler into a pulp based on cellulose fibres |
| 08/27/1997 | EP0791103A1 Method of papermaking having zero liquid discharge |
| 08/27/1997 | EP0791101A1 Odour treatment of malodorous condensates with ozone-containing residual gas |
| 08/27/1997 | EP0791098A1 Apparatus for fluffing pulp |
| 08/26/1997 | US5660889 Applying a composition comprising an organosiloxane modified with amino groups, a melamine-formaldehyde resin, and a curing catalyst; oxidation resistance |
| 08/21/1997 | WO1997030210A1 Process for bleaching of a high yield pulp |
| 08/21/1997 | WO1997030209A1 Process for bleaching of a high yield pulp |
| 08/21/1997 | WO1997030208A1 Process for the treatment of chemical pulp |
| 08/21/1997 | WO1997030207A1 Process for bleaching of chemical pulp |
| 08/20/1997 | EP0789798A1 Process for delignification and bleaching of chemical wood pulps |
| 08/20/1997 | EP0647158B1 Method for delignifying and bleaching a lignocellulose material |
| 08/20/1997 | CN1157644A Pulp bleaching |
| 08/19/1997 | US5658765 Xylanase process for producing the same method for the treatment of pulp and production of xylo-oligosaccharides |
| 08/19/1997 | US5658429 Process for bleaching of lignocellulose-containing pulp using a chelating agent prior to a peroxide-ozone-peroxide sequence |
| 08/14/1997 | WO1997029237A1 Process for increasing the charge on a lignocellulosic material, product obtainable by the process, and use of the product in the preparation of a lignocellulose-based product |
| 08/14/1997 | WO1997018897A3 Process for producing an organic thickening and suspension agent |