| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 04/23/2002 | CA2210637C Use of ethyleneamines in the removal of lignin |
| 04/23/2002 | CA2048618C A method of de-inking waste paper materials |
| 04/18/2002 | US20020043494 Device for the treatment of a fibrous suspension |
| 04/18/2002 | DE10051317A1 Catalysis of peroxy compound delignification or bleaching of fibrous materials in aqueous suspension uses transition metal complexes, some of which are novel compounds |
| 04/17/2002 | EP1196641A1 Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp |
| 04/17/2002 | CA2359162A1 Transition metal complexes with polydentate ligands for enhancing the bleaching and delignifying effect of peroxo compounds |
| 04/16/2002 | US6372333 Composition containing inorganic porous crystals-hydrophilic macromolecule composite and product made therefrom |
| 04/16/2002 | CA2079238C Membrane separation process |
| 04/11/2002 | US20020042353 Reducing agents |
| 04/11/2002 | US20020041961 Process for making a composition for conversion to lyocell fiber from an alkaline pulp having low average degree of polymerization values |
| 04/11/2002 | US20020040771 Method and apparatus for heating pulps |
| 04/10/2002 | EP0834051B1 Method and apparatus for treating material which conducts heat poorly |
| 04/10/2002 | CN1344316A Enzyme processing process |
| 04/09/2002 | US6369268 Diester amine adducts |
| 04/09/2002 | US6368463 Arrangement for adjusting width of fibre web |
| 04/09/2002 | US6368456 Method of making paper from aldehyde modified cellulose pulp with selected additives |
| 04/03/2002 | EP1192312A1 Fibrous structures including a fiber bundle and a debonding agent |
| 03/28/2002 | WO2002025008A1 Process and system for bleaching pulp with ozone wherein oxygen-rich gas is recycled |
| 03/28/2002 | WO2002025007A2 Light-stable lignocellulosic materials and their production_____ |
| 03/28/2002 | US20020037407 Readily cut into staple lengths and can be spun into yarns with excellent knitting and weaving characteristics and dyeability; cotton-like denier |
| 03/28/2002 | US20020036070 Cellulosic pulp having low degree of polymerization values |
| 03/28/2002 | CA2421397A1 Light-stable lignocellulosic materials and their production |
| 03/27/2002 | EP1189836A1 Method for stabilizing hydrogen peroxide |
| 03/27/2002 | CN1341788A High-pressure hydrogen peroxide bleaching method of soda pulp |
| 03/21/2002 | WO2002022945A1 Method for bleaching paper pulp |
| 03/21/2002 | WO2002022944A1 Method for delignifying and bleaching with an oxidizing agent and an oxidation-reduction catalyst |
| 03/21/2002 | WO2001071092A3 Pitch and stickies control in pulp and papermaking processes |
| 03/21/2002 | US20020034638 Lyocell fiber made from alkaline pulp having low average degree of polymerization values |
| 03/20/2002 | EP1092058A4 Method for selectively delignifying lignocellulosic materials |
| 03/20/2002 | EP0946818B1 Method and device for process control during bleaching of fibrous materials |
| 03/20/2002 | CN1341180A Multi-component system for the enzyme-catalysed oxidation of substrates and method for carrying out enzyme-catalysed oxidation |
| 03/20/2002 | CN1341125A process for selectively oxidizing cellulose |
| 03/19/2002 | US6358363 Using ozone |
| 03/19/2002 | CA2200327C Method of bleaching kraft pulp |
| 03/14/2002 | WO2001081666A3 Cellulose fiber having improved biostability |
| 03/14/2002 | WO2001046518A3 New process for pre-treating cellulosic fibers and cellulosic fiber blends |
| 03/14/2002 | US20020031971 Sheet strength; for use in absorbent articles, such as diapers |
| 03/14/2002 | DE10043893A1 Verfahren zur Durchführung eines der Faser- oder Papierherstellung dienenden Flotations-, Bleiche- und/oder Dispergierprozesses A method for carrying out a fiber or paper manufacturing serving flotation, Bleiche- and / or dispersion process |
| 03/13/2002 | EP1186706A2 Treatment of fibres or paper |
| 03/13/2002 | CN1340121A Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals |
| 03/13/2002 | CN1080699C Plant for producing hydrogen peroxide in a paper mill |
| 03/13/2002 | CA2319223A1 Improved method of bleaching of old corrugated container and other waste paper pulps |
| 03/12/2002 | US6355138 Method of chemically loading fibers in a fiber suspension |
| 03/12/2002 | US6354514 Method and apparatus for treating material having poor thermal conductivity |
| 03/07/2002 | WO2002018704A1 Enhanced vacuum dewatering of pulp |
| 03/07/2002 | US20020026992 Useful in production of paper blends containing portion of mechanical pulp as retention aid and strength additive |
| 03/07/2002 | US20020026989 Process for loading fibers with calcium carbonate |
| 03/06/2002 | EP1183334A1 Trametes cingulata lignin depolymerase |
| 03/06/2002 | EP0865531B1 Oxygen delignification of medium consistency pulp slurry |
| 03/06/2002 | CA2356586A1 A method for the carrying out of a flotation, bleach and/or dispersion process serving for the manufacture of fiber or paper |
| 02/28/2002 | WO2002016691A1 Chemical method |
| 02/28/2002 | WO2002016540A1 Enzyme compositions in tablet form |
| 02/28/2002 | WO2002016538A1 Use of percarbamic acids and diacyl percarbamates and precursors therefor |
| 02/27/2002 | EP0734470B1 Method for the manufacture of bleached cellulose pulp |
| 02/21/2002 | WO2002014600A1 Two-stage chlorine bleaching process with filtrate recirculation |
| 02/20/2002 | EP1180172A1 Process for bleaching chemical pulps with low organic halogen compounds content |
| 02/20/2002 | CN1336974A Arrangement for adjusting width of fibre web |
| 02/19/2002 | US6348130 Variable pressure screening |
| 02/14/2002 | WO2002012428A1 Method of making a composition, a product from such method, and the use thereof in removing or dissolving a contaminant from an environment |
| 02/13/2002 | EP1179075A2 Bacillus circulans xylanase mutants |
| 02/13/2002 | EP1030943B1 Bleaching of chemical pulp and treatment with a chelating agent |
| 02/13/2002 | EP0904445B1 Method for the production of highly absorbent hybrid fibres by ozoning and graft polymerizing and hybrid fibres produced through the method |
| 02/12/2002 | US6346407 Xylanase, microorganisms producing it, DNA molecules, methods for preparing this xylanase and uses of the latter |
| 02/12/2002 | US6346167 Kraft cooking communited cellulose fibers at high rate by controlling effective dissolved lignin concentration of the cooking liquor; kraft pulp of increased strength, bleachability that uses less effective alkali |
| 02/12/2002 | CA2313261C Process for preparing a high purity chemical-free microcrystalline cellulose from a chemically produced cellulose |
| 02/12/2002 | CA2202150C Process for delignification and bleaching of chemical wood pulps |
| 02/07/2002 | WO2002010508A1 Processes of reducing contamination from cellulosic suspensions |
| 02/07/2002 | WO2001036740A3 Paper making processes using enzyme and polymer combinations |
| 02/07/2002 | DE10037162A1 Bleich- und Oxidationsmittel und ihre Verwendung Bleaching and oxidizing agents and to their use |
| 02/07/2002 | CA2416252A1 Processes of reducing contamination from cellulosic suspensions |
| 02/05/2002 | US6344489 Without bubbles |
| 02/05/2002 | US6344109 Softened comminution pulp |
| 02/05/2002 | US6344108 Producing fibrous materials for the manufacture of cellulose, paper, or boards of wood material |
| 02/05/2002 | CA2119912C Thermostable xylanase from a strain of rhodothermus marinus |
| 01/31/2002 | US20020011317 Concurrently bleaching, heat treating and convolving cellulosic fiber pulp at elevated temperature and pressure at high consistency to preclude substantial fibrillation; length weighted curl index |
| 01/30/2002 | EP1175528A1 Absorbent articles and method for producing the same |
| 01/30/2002 | EP1175194A1 Absorbent articles with nits and free-flowing particles |
| 01/29/2002 | US6342124 Bleaching an aqueous alkaline slurry of cellulose pulp with oxygen or peroxide using an ethylene glycol adduct with various alcohols, or an etherified polyoxyalkylene glycol, or co-adducts and co-polymers thereof with other alkyl glycols |
| 01/29/2002 | US6341888 Apparatus for introduction of a first fluid into a second fluid |
| 01/24/2002 | WO2001048307A8 Electrochemical method for determinating lignin content of pulp |
| 01/24/2002 | US20020007926 Method for producing cellulose fiber having improved biostability and the resulting products |
| 01/24/2002 | US20020007925 Process and device for loading fibers with calcium carbonate |
| 01/24/2002 | US20020007515 Activating compound selected from the group of: organic acid salts, organic nitrogen derivatives, transitional metal salts, transitional metal complexes pigments; adding caustic soda and hydrogen peroxide; heating water bath to >50 degrees |
| 01/24/2002 | DE10033979A1 Verfahren zum Beladen von Fasern mit Calciumcarbonat A method of loading fibers with calcium carbonate |
| 01/24/2002 | DE10033978A1 Verfahren sowie Vorrichtung zum Beladen von Fasern mit Calciumcarbonat A method and apparatus for loading fibers with calcium carbonate |
| 01/23/2002 | EP1174491A2 Bleaching and oxidation agents and their use |
| 01/23/2002 | EP0879318B1 Process for increasing the negative charge on a lignocellulosic material and a modified lignocellulosic material with increased charge density |
| 01/23/2002 | EP0766761B1 Delignification of chemical pulp with peroxide in the presence of a transition metal |
| 01/23/2002 | CN1332818A Kraft wood fibers for carboxyalkyl cellulose |
| 01/22/2002 | US6340410 Method for delivering a variable flow of hydrogen peroxide to a bleaching vessel |
| 01/22/2002 | US6340409 Method for multistage bleaching using gaseous reagent in the first stage with controlled gas release |
| 01/22/2002 | US6340408 Method of preparation of a fluffed pulp to be used in absorbent products |
| 01/22/2002 | US6339859 Control system for a filtrate splitting device |
| 01/17/2002 | WO2001034091A3 Modification of polysaccharide containing materials |
| 01/17/2002 | US20020005262 Forming cellulose aldehyde by controlled oxidation of cellulose with aldehyde; wet strength |
| 01/16/2002 | EP1172478A1 Process for loading fibers with calcium carbonate |
| 01/16/2002 | EP1172477A1 Process and apparatus for loading fibers with calcium carbonate |
| 01/16/2002 | EP0988322B1 Ultra-fine microcrystalline cellulose compositions and process for their manufacture |
| 01/16/2002 | EP0925401B1 Method for bleaching paper pulp |
| 01/16/2002 | EP0832320B1 Process for preparing reduced odor and improved brightness individualized, polycarboxylic acid crosslinked fibers |