| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 03/25/2009 | CN101392469A Process for bleaching paper pulp and simultaneously degrading waste water COD by using high energy radiation |
| 03/19/2009 | WO2009034056A1 Removal of stickies from a pulp suspension, reduction of calcium compounds in reject and use of carbon dioxide in papermaking |
| 03/19/2009 | US20090075330 Xylanases with enhanced thermophilicity and alkalophilicity |
| 03/19/2009 | US20090071615 improved design for cooling, dilution and washing at the bottom of a continuous digester for the production of cellulose pulp; arranging at least one extra strainer section above the lowermost strainer section; space for the increase of production; improvement of the flow of the column of chips |
| 03/18/2009 | EP2035620A2 Compositions and processes to increase pulp yield, reduce extractives, and reduce scaling in a chemical pulping process |
| 03/18/2009 | CN101389808A A method for manufacturing mechanical pulp |
| 03/18/2009 | CN101387085A Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| 03/12/2009 | US20090068282 Complex of manganese, titanium, nickel, copper, cobalt, iron and ligands |
| 03/11/2009 | EP2034090A1 Method and apparatus for semi-chemical pulping |
| 03/11/2009 | CN101384769A Chemical pulp treatment compositions and methods |
| 03/11/2009 | CN101381970A Method for co-producing paper pulp and fuel ethanol by wild grass on forest land |
| 03/10/2009 | US7501041 Resistant to yellowing under light; fibrillated fibers of cellulose, hemicelluloses and lignin coated by crystallized calcium carbonate; simple, low cost |
| 03/10/2009 | CA2319074C Method and device for measuring bleach requirement, bleachability, and effectiveness of hemicellulase enzyme treatment of pulp |
| 03/10/2009 | CA2263266C A process to manufacture stabilized alkali or alkaline earth metal hypobromite and uses thereof in water treatment to control microbial fouling |
| 03/05/2009 | WO2008152188A3 Method for treating pulp at a chemical pulp mill |
| 03/05/2009 | US20090056890 Digester wash extraction by individual screen flow control |
| 03/04/2009 | EP2029809A1 Bleaching process of chemical pulp |
| 03/04/2009 | EP2029808A2 Method for producing fibrous material made of wood |
| 03/04/2009 | EP2029807A2 Lignocellulosic fibrous material made of wood |
| 03/04/2009 | EP2029806A2 Method for producing fibrous material |
| 03/04/2009 | CN101379423A Image presentation and micro-optic security system |
| 03/03/2009 | US7497924 Surface treatment with texturized microcrystalline cellulose microfibrils for improved paper and paper board |
| 02/26/2009 | WO2008152187A3 Method for treating liquid flows at a chemical pulp mill |
| 02/26/2009 | WO2008152186A3 Method for treating liquid flows at a chemical pulp mill |
| 02/26/2009 | WO2008152185A3 Method in connection with the washing of pulp at a chemical pulp mill |
| 02/26/2009 | US20090054863 Chemical activation and refining of southern pine kraft fibers |
| 02/26/2009 | US20090050575 Control of development of biofilms in industrial process water |
| 02/25/2009 | CN101374994A Method and arrangement for feeding chemicals into a process stream |
| 02/24/2009 | CA2321543C Methods for the preparation of an n-bis-[2-(1,2-dicarboxy-ethoxy)-ethyl]amine derivative and products of the methods and their uses |
| 02/18/2009 | EP2024558A2 Pulp and paper having increased brightness |
| 02/18/2009 | CN101368346A Method for full mulberry twigs pulping |
| 02/12/2009 | WO2009021216A2 Lignin dewatering process |
| 02/12/2009 | WO2008119770A9 Method for modifying the structure of a cellulose material by treatment with an ionic liquid |
| 02/12/2009 | US20090041896 Use in treatment of paper pulp or animal feeds; enzyme is active over a wide range of temperature and of basic and acid pH |
| 02/11/2009 | EP2022887A1 Process for producing bleached pulp |
| 02/11/2009 | EP2021541A1 Method for improving the quality of a fibrous pulp |
| 02/11/2009 | EP1546450A4 Method of deresinating pulp using alkyl alcohol alkoxylate surfactants |
| 02/11/2009 | CN101363201A Method for preparing edible fruit and vegetable dietary fiber paper |
| 02/11/2009 | CN101363200A Pulp bleaching technology in paper making process |
| 02/11/2009 | CN100460594C Thinning wood and other low sprecific wood used for leiser product |
| 02/05/2009 | WO2009015704A1 Bleached fibrous material |
| 02/05/2009 | WO2009015700A1 Use of wash and screw presses for washing raw material and fibrous material |
| 02/05/2009 | WO2009015556A1 Process for producing paper-making pulps from grasses and pulps obtained by the process |
| 02/05/2009 | WO2009015555A1 Grass paper pulp used by papermaking and preparation method thereof |
| 02/05/2009 | US20090032208 Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone |
| 02/05/2009 | US20090032207 Process for Producing Mechanical Pulp Suitable for Paper or Cardboard Making |
| 02/05/2009 | DE102007036377A1 Einsatz von Wasch- und Schneckenpressen für die Rohmaterial- und Faserstoffwäsche Use of detergents and screw presses for the raw material and pulp washing, |
| 02/05/2009 | DE102007036376A1 Gebleichter Faserstoff Bleached pulp |
| 02/04/2009 | CN101358436A Banana tree paper manufacture technique, slurry storage technique and sewage disposal technique thereof by soft chemistry method |
| 02/03/2009 | CA2237649C Novel xylanase composition and method for production thereof |
| 01/29/2009 | WO2009013539A1 Composition |
| 01/29/2009 | WO2009013534A1 Composition |
| 01/29/2009 | WO2009012566A1 Apparatus for separating from cellulose fibres in paper recycling processes |
| 01/29/2009 | WO2009012555A1 Method and apparatus for separating waste products from cellulose fibres in a paper recycling process |
| 01/29/2009 | CA2693940A1 Apparatus for separating waste from cellulose fibres in paper recycling processes |
| 01/29/2009 | CA2689129A1 Composition |
| 01/29/2009 | CA2688561A1 Composition |
| 01/28/2009 | CN101353874A Offset printing paper made from grass pulp and preparation thereof |
| 01/28/2009 | CN101353873A Food wrapping paper made from grass pulp and preparation thereof |
| 01/28/2009 | CN101353872A Duplicating paper made from grass pulp and preparation thereof |
| 01/28/2009 | CN101353871A Natural color wiping paper and preparation thereof |
| 01/28/2009 | CN101352296A Cutlery box produced by cereal straw pulp and preparation method thereof |
| 01/27/2009 | US7481905 Treatment with a percarboxylic acid, especially distilled peracetic acid, followed by treatment with a combination of a rosin size and a neutral size improves penetration resistance |
| 01/27/2009 | CA2403494C Proteins and polymers for use as pitch and stickies control agents in pulp and papermaking processes |
| 01/21/2009 | EP2016222A1 Method for producing a type of pulp |
| 01/20/2009 | US7479578 Fluff pulp fiber treated with polysiloxane as absorbent core, density 0.15 g/cm3 or greater, Young's modulus of about 75 psi or less; infant diapers, diaper-pants and training pants |
| 01/20/2009 | CA2382866C Method for bleaching pulp with chlorine dioxide |
| 01/14/2009 | EP2013325A1 Bleach systems enveloped with polymeric layers |
| 01/14/2009 | EP1664421A4 Chemimechanical desilication of nonwood plant materials |
| 01/14/2009 | CN201180167Y Bleaching and heating device for viscose fiber pulp production |
| 01/08/2009 | WO2009005791A1 Bleaching process with at least one extraction stage |
| 01/08/2009 | WO2009003770A1 Process for making paper and use of an acid/base treatment in papermaking |
| 01/08/2009 | CA2691590A1 Process for making paper and use of an acid/base treatment in papermaking |
| 01/07/2009 | EP2010709A1 Bleaching process of chemical pulp |
| 01/07/2009 | CN201176544Y Pulp washer of double-flow-passage distributor valve |
| 01/07/2009 | CN101338533A Method for producing toilet paper |
| 01/07/2009 | CN100448988C Culture having phenol oxidase-like activity |
| 01/06/2009 | CA2330057C A method of producing a fiber product |
| 01/06/2009 | CA2154628C Xylanase, microorganisms producing the same, dna molecules, process for preparing said xylanase and uses thereof |
| 12/31/2008 | WO2009002784A1 Carbon fibers from kraft softwood lignin |
| 12/31/2008 | EP2007944A1 A method and a device for feeding pulp from a dewatering unit |
| 12/31/2008 | CN201172772Y Drum-type dewaterer |
| 12/31/2008 | CN101333779A Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone |
| 12/30/2008 | CA2318387C Calcium carbonate synthesis method and resulting product |
| 12/24/2008 | EP2006441A1 Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone |
| 12/24/2008 | CN201169726Y Ultrasonic cleaning machine |
| 12/24/2008 | CN201169725Y Inclined filtering path floating force-free pulp washing machine |
| 12/24/2008 | CN101331260A Bleaching of substrates |
| 12/24/2008 | CN101328695A Production process of cotton pulp for manufacturing automobile oil-gas filter parer |
| 12/24/2008 | CN101328692A Paper pulp fabrication process and system |
| 12/23/2008 | CA2446490C Method for brightening virgin mechanical pulp |
| 12/23/2008 | CA2241968C Production and secretion of proteins of bacterial origin in filamentous fungi |
| 12/18/2008 | WO2008152189A2 Method for treating liquid flows at a chemical pulp mill |
| 12/18/2008 | WO2008152188A2 Method for treating pulp at a chemical pulp mill |
| 12/18/2008 | WO2008152187A2 Method for treating liquid flows at a chemical pulp mill |
| 12/18/2008 | WO2008152186A2 Method for treating liquid flows at a chemical pulp mill |
| 12/18/2008 | WO2008152185A2 Method in connection with the washing of pulp at a chemical pulp mill |
| 12/18/2008 | US20080308239 Fiber blend having high yield and enhanced pulp performance and method for making same |
| 12/18/2008 | CA2634978A1 Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone |
| 12/17/2008 | CN101326326A New catalystic reactor method for producing commercial grade pulp, native lignin and single cell protein |