| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 06/26/2008 | CA2671876A1 A process in a (d) stage bleaching of hardwood pulps in a presence of mg(oh)2 |
| 06/26/2008 | CA2671826A1 A process in a (d) stage bleaching of softwood pulps in a presence of mg(oh)2 |
| 06/25/2008 | EP1934396A2 Bleaching of substrates |
| 06/25/2008 | CN101208476A Method for loading fibers contained in a pulp suspension |
| 06/24/2008 | US7390378 Durable curl to papermaking fibers; pressurized rotating drum; controlling temperature |
| 06/19/2008 | WO2008071718A1 Method for bleaching chemical paper pulps by final ozone treatment at high temperature |
| 06/19/2008 | US20080146702 shearing fibers to texturize and expose its internal fibers, then compressing into pellets and reopening the densified fibers in a resin to provide a network of fibers encapsulated in the resins; recycling wastes |
| 06/19/2008 | US20080142175 Treating a softwood pulp with a bleaching agent comprising ClO2 in the presence of a weak base such as Mg(OH)2; improved bleaching efficiency, high pulp brightness and brightness stability, improved pulp cleanliness |
| 06/19/2008 | US20080142174 Treating a softwood pulp with a bleaching agent comprising ClO2 in the presence of a weak base such as Mg(OH)2; improved bleaching efficiency, high pulp brightness and brightness stability, improved pulp cleanliness |
| 06/19/2008 | DE102006058513A1 Entwässerungssieb und Verfahren zu seiner Herstellung Dewatering and process for its preparation |
| 06/19/2008 | CA2670697A1 Method for bleaching chemical paper pulps by final ozone treatment at high temperature |
| 06/18/2008 | EP1774088B1 Method for removing lignin from water |
| 06/18/2008 | EP1732709A4 Apparatus and method for treating mulch |
| 06/18/2008 | CN101200863A Use of sodium tripolyphosphate in oxygen delignification bleaching as protection additive |
| 06/18/2008 | CN101200862A Clean pulping process |
| 06/18/2008 | CN100395404C Scouring process for grass pulping course |
| 06/18/2008 | CN100395403C Oxygen delignify treating method for grass group unbleached chemical pulp |
| 06/17/2008 | US7387708 Process for feeding pulp into a blow tank or storage tank |
| 06/12/2008 | WO2008069728A1 Drying box |
| 06/12/2008 | WO2008067916A1 Method of treating filtrate produced in thickening of paper fibre suspension |
| 06/12/2008 | US20080135198 Apparatus For Controlling the Consistency of a Flow of Stock Solution |
| 06/12/2008 | US20080135194 Treating a fluid suspension of particles with a cyclodextrin compound to increase particle content of the cake and the dewatering rate of the flocs; reducing wet solids such as sludge which require disposal and increasing the efficiency of the dewatering process such as in pulping and papermaking |
| 06/12/2008 | US20080135193 Inflated filbers of regenerated cellulose formed from ionic liguid/cellulose dope and related products |
| 06/11/2008 | CN101195972A In situ preparation method of thiourea dioxide in paper-pulp decolorization |
| 06/11/2008 | CN100393939C Process for producing a fibrous composition |
| 06/10/2008 | US7384504 Light-stable and process-stable lignocellulosic materials and their production |
| 06/10/2008 | US7384502 Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness |
| 06/10/2008 | US7384185 Apparatus for mixing a chemical medium with a pulp suspension |
| 06/10/2008 | US7384184 Apparatus for mixing a chemical medium with a pulp suspension |
| 06/10/2008 | CA2189008C Method and plant for producing hydrogen peroxide |
| 06/05/2008 | WO2008066475A1 Method and unit for seal adjustment in a washing arrangement and a washing arrangement comprising such a unit |
| 06/05/2008 | CA2669529A1 Method and unit for seal adjustment in a washing arrangement and a washing arrangement comprising such a unit |
| 06/04/2008 | CN100392179C Fibers from plant seeds and use |
| 06/04/2008 | CN100392177C Process of immersing rolling for pulping and special eqiupment thereof |
| 06/03/2008 | US7381295 Centrifuging, cleaning; pressurized screens; bypass manifolds; circulation |
| 05/29/2008 | WO2008063122A1 A press roll for washing and/or dewatering pulp, and a method for manufacturing or repairing such a press roll |
| 05/29/2008 | US20080121358 Method And System For Treating A Fibrous Suspension |
| 05/29/2008 | CA2662387A1 A press roll for washing and/or dewatering pulp, and a method for manufacturing or repairing such a press roll |
| 05/28/2008 | CN101189390A Arrangement for the treatment of cellulose pulp in a washing apparatus arranged with displaced peripheral valve seals |
| 05/28/2008 | CN101189389A Arrangement for the treatment of cellulose pulp in a washing apparatus arranged with seal removing means |
| 05/28/2008 | CN101189388A Arrangement and method for treatment of cellulose pulp involving means for seal adjustment. |
| 05/28/2008 | CN101189387A Arrangement for the treatment of cellulose pulp in a washing apparatus adapted to facilitate service and inspection of the apparatus |
| 05/22/2008 | WO2008059006A1 A process for reducing scaling in the pulp and paper industry and use of carbon dioxide therefor |
| 05/22/2008 | CA2669032A1 An improved bleaching process with at least one extraction stage |
| 05/21/2008 | EP1487955B1 Ammonium nitriles and the use thereof as hydrophobic bleaching activators |
| 05/21/2008 | CN101184892A Arrangement for treatment of cellulose pulp |
| 05/21/2008 | CN101184891A Arrangement for the treatment of cellulose pulp in a washing apparatus arranged with a reinforcing frame |
| 05/15/2008 | WO2008057492A2 Pitch and stickies control in pulp and papermaking processes |
| 05/15/2008 | WO2008055327A1 Process for treating cellulose pulp using carboxymethylcellulose and pulp thus obtained |
| 05/15/2008 | WO2008039672A3 Rapid fatty acid assay for use in pulp pitch control |
| 05/15/2008 | US20080110585 Enhanced fiber additive; and use |
| 05/15/2008 | US20080110584 pulp is treated with a chelating agent at acidic pH followed by a washing stage prior to bleaching; papermaking; sequence facilitates the pulp metal profile prior to bleaching stage to be more conducive to peroxide treatment by selectively removing detrimental metals such as Mn, Fe, and Cu |
| 05/15/2008 | CA2669140A1 Process for treating cellulose pulp using carboxymethylcellulose and pulp thus obtained |
| 05/15/2008 | CA2668597A1 Pitch and stickies control in pulp and papermaking processes |
| 05/14/2008 | CN101177921A Continuous pulping method for cotton stalk natural color chemomechanical pulp |
| 05/08/2008 | US20080105393 Oxidation of a substrate having at least one primary hydroxyl groups, e.g., carbohydrates, polysaccharides or cellulose fiber, by reacting with a nitrosonium ion in the presence of an oxidase and hydrogen peroxide to form aldehydes and/or carboxy groups; environment; kinetics; papermaking; pulps |
| 05/06/2008 | US7368036 Exposing kraft, soda, or sulfite pulp to a first chlorine dioxide bleaching stage; treating with a xylanase in a mild extraction stage; exposing to a second chlorine dioxide bleaching stage without an alkaline extraction stage; reduced usage of sodium hydroxide; high strength, high yield |
| 05/02/2008 | WO2008051157A1 Press washer comprising separation of filtrates |
| 05/02/2008 | CA2667242A1 Press washer comprising separation of filtrates |
| 04/30/2008 | CN101171389A Ligno cellulosic materials and the products made therefrom |
| 04/30/2008 | CN101171388A Process for producing mechanical pulp suitable for paper or cardboard making |
| 04/30/2008 | CN101171386A Chlorine dioxide treatment composition and method |
| 04/30/2008 | CN101168934A Method for preparing applique paper |
| 04/30/2008 | CN101168930A Paper pulp deinking method and system in paper-making process from waste paper |
| 04/29/2008 | US7364640 Prepulping; refining; filtration; dehydration; adjustment of pH; separation |
| 04/29/2008 | US7364639 Method of producing twisted, curly fibers |
| 04/29/2008 | US7364638 pressing out water in a thickening device to form a highly consistent paper fiber stock, then heating the highly consistent paper fiber stock, and dispersing the heated highly consistent paper fiber stock with dispersers |
| 04/29/2008 | US7363730 Devices and method for removing broken pulp web from a pulp dryer and maintenance platform for a pulp dryer |
| 04/29/2008 | CA2262348C Composition containing inorganic porous crystals-hydrophilic macromolecule composite and product made therefrom |
| 04/22/2008 | CA2162518C Polyether polyamino methylene phosphonates for high ph scale control |
| 04/17/2008 | WO2008045770A2 Method of producing absorbent sheet with increased wet/dry cd tensile ratio |
| 04/17/2008 | WO2008044988A1 Bleaching of pulp |
| 04/17/2008 | WO2007143182A9 Improved process for manufacturing pulp, paper and paperboard products |
| 04/17/2008 | US20080087391 Rotary drum for condensing pulp from slurry vat, including radial conduits delivering filtrate from pulp mat on outer surface of drum to filtrate conduit coaxial with drum rotational axis, valve segment in filtrate conduit including outer surface juxtaposed against drainage outlets |
| 04/17/2008 | DE112006001002T5 Verfahren zur Herstellung mechanischen Zellstoffs, der zur Herstellung von Papier oder Pappe geeignet ist A process for producing mechanical pulp suitable for making paper or paperboard |
| 04/17/2008 | CA2665969A1 Bleaching of pulp |
| 04/16/2008 | CN101161928A Bleaching process for broussonetia papyrifera white bast bio-pulp |
| 04/16/2008 | CN101161691A Dispersion polymeric acrylamide emulsion and its application in oil field produced liquid treatment |
| 04/16/2008 | CN100381638C Method of preparing paper product using cotton stalk chemical pulp |
| 04/16/2008 | CN100381636C Bleaching method of cotton stalk chemical pulp |
| 04/16/2008 | CN100381635C Method of preparing bleached chemical pulp using cotton stalk |
| 04/15/2008 | CA2308580C Method for bleaching mechanical pulp |
| 04/13/2008 | CA2593240A1 Gas free valve for pulp vacuum washer and method |
| 04/10/2008 | WO2007144824A3 Pulp reactivity enhancement |
| 04/10/2008 | US20080083519 Method of Producing Absorbent Sheet with Increased Wet/Dry CD Tensile Ratio |
| 04/09/2008 | EP1908876A1 Mediator-enzyme system for controlling pitch deposits in pulp and paper production |
| 04/09/2008 | EP1907623A1 Ligno cellulosic materials and the products made therefrom |
| 04/09/2008 | CN101158125A Paper-making grade softwood pulp plate modifying production technique |
| 04/09/2008 | CN101158124A Paper-making grade pulp bleaching plate modifying production technique |
| 04/09/2008 | CN101158123A High-strength bamboo pulp manufacturing technique |
| 04/09/2008 | CN101158122A Bamboo dissolved pulp manufacturing technique |
| 04/09/2008 | CN101158121A Process for manufacturing dissolved pulp by using ethanol, sulfate and acetic acid |
| 04/09/2008 | CN100379923C White pitch deposit treatment method |
| 04/09/2008 | CN100379724C Inhibition of pulp and paper yellowing using nitroxides and other coadditives |
| 04/03/2008 | WO2008039672A2 Rapid fatty acid assay for use in pulp pitch control |
| 04/03/2008 | WO2008013875A3 Hydrophobically modified poly(ethylene glycol) for use in pitch and stickies control in pulp and papermaking processes |
| 04/03/2008 | WO2007140837A3 Method for producing fibrous material |
| 04/03/2008 | US20080078515 Blend a carboxyalkyl cellulose and galactomannan polymer or glucomannan polymer in water; treat with transition metal crosslinking agent to form a gel; dry, grind, mix with alcohol, guar gum, locust bean gum, and tara gum |
| 04/03/2008 | US20080078514 Treat cellulose fibers with carboxyalkyl cellulose polymers, carboxyalkyl starch polymers, alginates, chitosans, starches; hydrophilic galactomannan, glucomannan, alginic acids, carageenans polysaccharide polymer with a transition metal crosslinking agent in water |
| 04/02/2008 | EP1904681A2 Method for loading fibers contained in a pulp suspension |