| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 04/18/1992 | CA2094268A1 Method for preserving the mechanical strength properties of chemical paper pulp |
| 04/16/1992 | WO1992006241A1 Improved washing process |
| 04/15/1992 | EP0480476A1 Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans and stickies from secondary fibers |
| 04/15/1992 | EP0480469A2 Chlorine-free wood pulps and process of making |
| 04/14/1992 | US5104411 Freeze dried, cross-linked microfibrillated cellulose |
| 04/13/1992 | CA2044323A1 Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans and stickies from secondary fibers |
| 04/08/1992 | EP0479319A1 Process poor in chlorine for the bleaching and delignification of cellulosic pulp |
| 04/08/1992 | EP0478762A1 Method and device for separating a fibre suspension. |
| 04/07/1992 | US5102501 Multiple layer fibrous web products of enhanced bulk and method of manufacturing same |
| 04/06/1992 | CA2052758A1 Process for the low chlorine bleaching and delignification of cellulose |
| 04/01/1992 | CN1059946A Technology for making paper pulp with pure tobacco stalk by imine method |
| 03/25/1992 | EP0476230A2 Extended kraft cooking with white liquor added to wash circulation |
| 03/25/1992 | EP0308419B1 An apparatus for treating fibre material containing liquid |
| 03/19/1992 | DE4029562A1 Cellulose@ washing assembly - has pressure roller immediately after couch roller to press out fluid and increase material density |
| 03/18/1992 | EP0475930A1 Gas sparged centrifugal separation and/or mixing |
| 03/17/1992 | US5096539 Immersion in salt solution, strength, papermaking |
| 03/12/1992 | CA2050986A1 Chlorine-free process for bleaching pulp |
| 03/11/1992 | EP0428512A4 Ozone generation by corona discharge at elevated pressures |
| 03/05/1992 | WO1992004501A1 Method for controlling stickies in pulp and papermaking processes using recycled paper |
| 03/05/1992 | WO1992003609A1 Bleaching chemical pulp using chlorine/chlorine dioxide then ozone |
| 03/05/1992 | WO1992003541A1 A process for hydrolyzing hemicellulose by enzymes produced by trichoderma reesei |
| 03/05/1992 | WO1992003540A1 Enzymes with xylanolytic activity |
| 03/05/1992 | CA2090337A1 Enzymes with xylanolytic activity |
| 03/05/1992 | CA2089548A1 Method for controlling stickies in pulp and papermaking processes using recycled paper |
| 03/05/1992 | CA2089477A1 Bleaching chemical pulp using chlorine/chlorine dioxide then ozone |
| 03/04/1992 | EP0473560A1 Process for the production of chlorine dioxide |
| 03/04/1992 | EP0473559A1 Process for the production of chlorine dioxide |
| 03/04/1992 | EP0473545A2 Thermostable endoxylanases |
| 03/04/1992 | EP0472820A2 Continuous solvent pulping and washing processes and apparatus |
| 03/04/1992 | CN2097846U Serous adverse flow washing and separating machine |
| 03/04/1992 | CN2097845U Grass slice washing machine |
| 03/01/1992 | CA2045436A1 Gas sparged centrifugal separation and/or mixing |
| 02/25/1992 | WO1992003608A1 Process for treatment of lignocellulosic pulp and apparatus for performance of the process |
| 02/25/1992 | US5091167 Process for the production of chlorine dioxide |
| 02/25/1992 | US5091166 Reacting alkali metal chlorate with mineral acid; bleaching paper pulp |
| 02/25/1992 | US5091054 Process for bleaching and delignification of lignocellulosic |
| 02/25/1992 | CA2090338A1 Process for treatment of lignocellulosic pulp and apparatus for performance of the process |
| 02/24/1992 | CA2044080A1 Method of reducing levels of dioxins in chlorine-bleached wood pulp |
| 02/23/1992 | CA2049540A1 Thermostable endoxylanases |
| 02/19/1992 | CN2096577U Double spiral pulp machine |
| 02/18/1992 | WO1992003615A1 Method for controlling pitch deposits in pulp and papermaking processes |
| 02/18/1992 | US5089089 System for sulfonating mechanical pulp fibers |
| 02/18/1992 | CA2089549A1 Method for controlling pitch deposits in pulp and papermaking processes |
| 02/18/1992 | CA2042885A1 Continuous solvent pulping and washing processes and apparatus |
| 02/12/1992 | EP0470929A2 New fungi for pitch reduction, their preparation and use |
| 02/11/1992 | US5087326 Rotating pulp bleaching reactor having inner and outer shells and lifting means on the interior surface of the inner shell |
| 02/11/1992 | US5086620 Method of microencapsulation of hyperbaric gas |
| 02/11/1992 | CA1295440C Process for bleaching |
| 02/09/1992 | WO1992002148A1 Process for bleaching/sanitizing food fiber |
| 02/06/1992 | WO1992001834A1 Method for reducing brightness reversion in lignin-containing pulps and article of manufacture thereof |
| 02/06/1992 | WO1992001793A1 Cloning and expression of xylanase genes from fungal origin |
| 02/06/1992 | CA2067329A1 Cloning and expression of xylanase genes from fungal origin |
| 02/04/1992 | US5085734 Methods of high consistency oxygen delignification using a low consistency alkali pretreatment |
| 02/01/1992 | CA2047900A1 Fungi for pitch reduction, their preparation and use |
| 01/29/1992 | EP0468596A1 Enzymatic treatment of silage |
| 01/28/1992 | US5084307 Immersion of fibers in an ion solution and drying |
| 01/25/1992 | WO1992001389A1 Enzymatic treatment of silage |
| 01/25/1992 | CA2066734A1 Enzymatic treatment of silage |
| 01/22/1992 | EP0466753A1 A process and apparatus for continuous filtering and liquid displacement of a liquid suspension of a fibrous or finely-divided material. |
| 01/22/1992 | EP0466752A1 A process for treating a fiber pulp with a chemical solution. |
| 01/22/1992 | CN1058061A Pressurized dynamic washer |
| 01/21/1992 | CA1294396C Process for decreasing the charge of chemical required in a bleaching extraction stage |
| 01/15/1992 | EP0466615A1 Process for deinking printed paper |
| 01/15/1992 | EP0466411A1 Two-stage peroxide bleaching process |
| 01/15/1992 | CN1015301B Method for removing black skin of cotton stem |
| 01/14/1992 | US5080759 Method for controlling stickies in pulp and papermaking processes using recycled paper |
| 01/14/1992 | US5080754 Method for reducing brightness reversion in lignin-containing pulps and article of manufacture thereof |
| 01/14/1992 | CA1294091C Method of intensifying the washing of a fibre suspension |
| 01/08/1992 | EP0465000A1 Composition for treating coated broke and its use |
| 01/08/1992 | EP0464993A1 process for control of pitch deposition from pulps in papermaking systems |
| 01/08/1992 | EP0464157A1 Ozone treatment of chlorine dioxide/chlorine chlorinated pulp. |
| 01/08/1992 | EP0464110A1 Bleaching process for the production of high bright pulps. |
| 01/07/1992 | CA2045754A1 Two-stage peroxide bleaching process |
| 01/02/1992 | EP0463706A1 Cloning and expression of xylanase genes from fungal origin |
| 12/30/1991 | WO1992000413A1 Pressurized dynamic washer |
| 12/24/1991 | US5074961 Water soluble cellulose ethers |
| 12/24/1991 | US5074960 Lignin removal method using ozone and acetic acid |
| 12/24/1991 | US5074959 Hydrophilic, high strength |
| 12/24/1991 | US5074958 Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans and stickies from secondary fibers using supercritical propane solvent extraction |
| 12/24/1991 | US5074476 Method of manufacturing fibre material containing lignocellulose for the production of fibre boards |
| 12/24/1991 | CA1293403C2 Pressure pulp washer |
| 12/24/1991 | CA1293402C Pressure pulp washer |
| 12/24/1991 | CA1293360C Apparatus for the treatment of a material, in particular a web of material or pulp, made to pass between at least two endless permeable belts |
| 12/18/1991 | EP0461138A1 Method and apparatus for thickening fiber suspension |
| 12/17/1991 | US5073301 Bleaching with ozone and/or oxygen and treating with formamidi nnesulfinic acid during alkaline extraction |
| 12/12/1991 | DE4018120A1 Cellulose washing |
| 12/11/1991 | EP0460638A1 Process and apparatus for washing cellulosic pulp |
| 12/10/1991 | CA1292887C Method in the bleaching of cellulose pulp |
| 12/07/1991 | CA2043840A1 Method and apparatus for washing pulp |
| 12/03/1991 | US5069919 Process for bleaching/sanitizing food fiber |
| 12/03/1991 | US5069880 Water purification |
| 12/03/1991 | US5069752 Minimization of variations in high pressure steam flow in pape rmaking |
| 11/27/1991 | EP0457865A1 Method for bleaching with reduced organic chlorides |
| 11/26/1991 | US5068009 Method of producing fluff pulp with improved defibration properties |
| 11/26/1991 | CA1292469C Cross-linked pore containing microfibrillated cellulose prepared by freezing and solvent exchange |
| 11/24/1991 | CA2017419A1 Method composition, and product for restroring natural beauty of teak wood |
| 11/20/1991 | CN2089018U Mechanical defoamer |
| 11/19/1991 | CA1292217C Absorbent structure containing individualized, crosslinked fibers |
| 11/18/1991 | WO1991018438A1 A ground fault circuit interrupter |
| 11/18/1991 | WO1991018145A1 Environmentally improved process for bleaching lignocellulosic materials |