| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 01/06/2010 | EP2140064A1 A method for reducing the energy consumption at the refining of a pulp suspension in a papermaking process and use of sodium bicarbonate in papermaking |
| 01/06/2010 | CN101622397A Process for treating cellulose pulp using carboxymethylcellulose and pulp thus obtained |
| 01/06/2010 | CN100577912C Method for controlling pitch and stickies deposition |
| 12/31/2009 | US20090321025 Pulp reactivity enhancement |
| 12/30/2009 | EP2137350A1 Process for the control of pitch |
| 12/30/2009 | CN100575597C Chemical activation and refining of southern pine kraft fibers |
| 12/29/2009 | US7638613 For use in the treatment of paper pulp, stable over wide temperature and pH range |
| 12/24/2009 | US20090314443 Method for producing fibrous material |
| 12/23/2009 | WO2009154549A1 Cooling of a cellulose pulp web |
| 12/23/2009 | WO2009135987A3 Method and arrangement for improving the operation of sealing elements of a drum washer |
| 12/23/2009 | EP2134820A1 Process for drying and purifying a particulate cellulose/plastic waste mixture |
| 12/23/2009 | CN101611195A Detoxifying pre-treated lignocellulose-containing materials |
| 12/23/2009 | CN101611062A Method for functionalising carbohydrates |
| 12/23/2009 | CN100572658C Method for controlling gooey with 100% waste newsprint paper deinked pulp esterase |
| 12/23/2009 | CN100572657C Wood pomace modification producing technology |
| 12/22/2009 | CA2627221C Processes and apparatuses for treating and/or increasing dryness of a substance |
| 12/22/2009 | CA2450464C Four stage alkaline peroxide mechanical pulping |
| 12/22/2009 | CA2376238C Sealing arrangement for a pulp dewatering arrangement |
| 12/17/2009 | US20090308550 Pin chip recovery |
| 12/16/2009 | EP2132377A1 Method for the breakdown of lignin |
| 12/15/2009 | CA2417338C Two-stage chlorine bleaching process with filtrate recirculation |
| 12/15/2009 | CA2356444C Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals |
| 12/10/2009 | US20090306364 Use of special screens in the preparation of cellulose powder |
| 12/09/2009 | CN201358408Y Drainage foil of filter-press wet slurry machine |
| 12/09/2009 | CN201358407Y Slurry inlet box of filter-press wet slurry machine |
| 12/09/2009 | CN101597876A New technique of starch addition used for improving paper strength |
| 12/09/2009 | CN101597875A New technique for improving paper strength by joint gelatinization of starch and pulp |
| 12/09/2009 | CN101597872A Post-processing technology for hydrogen peroxide bleaching paper pulp preheated by potassium permanganate |
| 12/09/2009 | CN101597871A Paper pulping bleaching and waste water purification integration technology |
| 12/09/2009 | CN101597870A Production process of cotton pulp for cellulose triacetate |
| 12/09/2009 | CN100567632C Poplar ASGW pulping process |
| 12/09/2009 | CN100567471C Use of metal complex compounds as oxidation catalysts |
| 12/08/2009 | US7628929 Improving the efficacy of a peroxide deinking or bleaching agent such as in papermaking using a substance formed by the reaction of a hypochlorite oxidant and an ammonium salt which interfers with the production of a peroxide-degrading enzyme by microorganisms |
| 12/03/2009 | WO2009144190A1 Process for the bleaching of paper pulp |
| 12/03/2009 | CA2723311A1 Process for the bleaching of paper pulp |
| 12/02/2009 | EP2128331A1 Process for the bleaching of paper pulp |
| 12/02/2009 | EP2126195A1 Method for the production of tissue paper |
| 12/02/2009 | CN101591866A Clean paper making method by kenaf |
| 12/02/2009 | CN101591864A Environment friendly pulping process |
| 12/02/2009 | CN100564665C Clean production method for rice-wheat straw pulp capable of poaching by acetic acid method |
| 12/01/2009 | CA2422610C Method for bleaching paper pulp |
| 11/26/2009 | WO2009140808A1 A process and system for pulping which are environmental protective, energy saving, circulating and green |
| 11/26/2009 | WO2009140807A1 Multifunctional and integrated pulping apparatus including high density digesting and bleaching |
| 11/25/2009 | EP2122048A2 A process in a (d) stage bleaching of softwood pulps in a presence of mg(oh)2 |
| 11/25/2009 | CN201351248Y Isolated bleaching and cleaning production device |
| 11/25/2009 | CN101589192A A process in a (D) stage bleaching of hardwood pulps in a presence of Mg(OH)2 |
| 11/25/2009 | CN101589191A Bleaching of substrates |
| 11/25/2009 | CN101586314A Mechanical method for making pulp by extruding sunflower stems |
| 11/24/2009 | US7622023 Twin-wire press |
| 11/24/2009 | CA2168344C Thermostable xylanases |
| 11/19/2009 | WO2009139693A1 Method of bleaching pulp with ozone, chlorine dioxide and peroxide |
| 11/19/2009 | WO2009138700A1 Direct synthesis of aqueous hydrogen peroxide solution at the site of a paper mill |
| 11/19/2009 | WO2009117818A4 Process of chlorine dioxide bleaching of chemical pulps using magnesium hydroxide or magnesium oxide |
| 11/19/2009 | CA2723230A1 Direct synthesis of aqueous hydrogen peroxide solution at the site of a paper mill |
| 11/18/2009 | EP2118363A1 New composition and process for the treatment of fibre material |
| 11/18/2009 | EP2118144A1 Method for functionalising carbohydrates |
| 11/18/2009 | CN101583759A New composition and process for the treatment of fibre material |
| 11/12/2009 | WO2009135987A2 Method and arrangement for improving the operation of sealing elements of a drum washer |
| 11/12/2009 | WO2009069143A3 Synergistic composition and a process for biobleaching of ligno cellulosic pulp |
| 11/12/2009 | US20090277598 Nut Cracker |
| 11/12/2009 | US20090277596 Bleaching process of chemical pulp |
| 11/12/2009 | DE102008023000A1 Suspension i.e. pulp suspension, conveying and draining method for paper processing system, involves conveying drained suspension into thick material outlet from device, where pressure existing at outlet is higher than pressure at inlet |
| 11/11/2009 | CN201343672Y Multi-nip dual-network press filter pulp wetting machine |
| 11/11/2009 | CN201343671Y Advanced process control system for pulp bleaching |
| 11/11/2009 | CN101578416A Drying box |
| 11/11/2009 | CN101575820A Method for removing metal ions of paper pulp and bleaching |
| 11/05/2009 | WO2009133053A1 Adsorption method for reclaiming molybdate or tungstate from aqueous solutions |
| 11/05/2009 | US20090272504 Method and apparatus for the integrated cleaning of a paper-pulp processing plant |
| 11/05/2009 | CA2724024A1 Process for recovering molybdate or tungstate from aqueous solutions |
| 11/04/2009 | EP2113575A1 Method of recovering molybdat and wolframat from aqueous solutions |
| 11/04/2009 | EP2113044A1 Process for the bleaching of paper pulp |
| 11/03/2009 | CA2268097C Sulfinic acid derivatives and their preparation and use |
| 10/29/2009 | WO2009131527A1 A distribution device for feeding of cellulose pulp |
| 10/29/2009 | WO2009130168A1 Method for reduction of light-induced yellowing of lignin-containing material |
| 10/29/2009 | WO2009130167A1 Pretreatment method for reduction of light-induced yellowing of lignin-containing material |
| 10/29/2009 | CA2722055A1 Method for reduction of light-induced yellowing of lignin-containing material |
| 10/29/2009 | CA2718550A1 A distribution device for feeding of cellulose pulp |
| 10/28/2009 | CN101568685A Method for treating ligno-cellulosic materials |
| 10/28/2009 | CN101565915A Process for producing enhanced wood fiber sponge |
| 10/28/2009 | CN101565909A Little-chlorine and little-pollution bleaching process for paper pulp biomimetic pretreatment |
| 10/28/2009 | CN100554576C Method for improving mechanical wood pulp fibre performance |
| 10/22/2009 | US20090264036 Nanofiber sheet, process for producing the same, and fiber-reinforced composite material |
| 10/22/2009 | US20090260767 Use of hydrophobic dyes to monitor hydrophobic contaminants in a papermaking process |
| 10/21/2009 | CN101560740A Bleaching method for bleaching deinked waste pulp |
| 10/21/2009 | CN101560739A Pulping process |
| 10/21/2009 | CN100551941C Dispersion polymeric acrylamide emulsion and its application in produced liquid treatment of oil field |
| 10/20/2009 | US7604711 Process for batch displacement digester systems to increase tank farm vessel temperatures for more efficient delignification rates by mitigating formation of flow channels in chip bed, minimizing vertical temperature gradient in digester and segregation of returning liquors to tank farm from digester |
| 10/20/2009 | CA2407014C Addition of thp or thp salt to pulping liquors to reduce or destroy catalase and/or catalase producing bacteria |
| 10/20/2009 | CA2337128C Method of bleaching and providing papermaking fibers with durable curl |
| 10/15/2009 | WO2009126106A1 Method for providing a nanocellulose involving modifying cellulose fibers |
| 10/15/2009 | CA2721056A1 Method for providing a nanocellulose involving modifying cellulose fibers |
| 10/14/2009 | EP2108676A1 Crosslinked heterogeneous polysacharides |
| 10/14/2009 | CN101558197A Method for bleaching chemical paper pulps by final ozone treatment at high temperature |
| 10/14/2009 | CN101555672A Food wrapper and manufacturing method thereof |
| 10/14/2009 | CN100549290C Method for treating pulp in connection with the bleaching of chemical pulp |
| 10/13/2009 | US7601243 Method for conveying, mixing, and leveling dewatered pulp prior to drying |
| 10/13/2009 | CA2372499C A process for production of paper materials with improved wet strength |
| 10/13/2009 | CA2341490C Bleaching of medium consistency pulp with ozone without high shear mixing |
| 10/08/2009 | WO2009123546A1 Device and method for dilution of cellulose pulp |
| 10/08/2009 | WO2009121926A1 Sheet-formed fibrous material with improved strength property |