| Patents for D21C 3 - Pulping cellulose-containing materials (5,020) |
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| 04/24/1997 | WO1997014490A1 Defoamer/antifoam composition |
| 04/17/1997 | WO1997013862A1 Fungal cellulases |
| 04/16/1997 | EP0554391B1 Pulping process |
| 04/15/1997 | US5620562 Continuous digestion of kraft pulp while maintaining low concentrations of dissolved organic materials yields increased strength and bleachability |
| 04/10/1997 | DE19537134A1 Prodn. of cellulose pulp |
| 04/09/1997 | CN1147042A Straw digesting pulp-making process, method and system for recovery of waste wash liquor thereof |
| 04/02/1997 | CN1146512A Wave pressure pulping pollution-free paper-making technology |
| 03/29/1997 | WO1997019220A2 Process for preparing a pulp-cooking solution |
| 03/29/1997 | CA2238100A1 Process for preparing a pulp-cooking solution |
| 03/26/1997 | EP0696224B1 Aqueous anti-foaming agent dispersions |
| 03/20/1997 | WO1997010384A2 Process and arrangement for monitoring cellulose digestion |
| 03/20/1997 | CA2232171A1 Process and arrangement for monitoring the cooking of pulp |
| 03/19/1997 | EP0763622A2 Continuous solvent pulping and washing processes and apparatus |
| 03/12/1997 | EP0635080B1 Method of producing pulp |
| 02/26/1997 | CN1143699A Method for preparing dissolved pulp of artificial wheat straw fibre |
| 02/19/1997 | CN1143398A Impact of temperature and alkali charge on pulp brightness |
| 02/12/1997 | CN1142557A Process for treatment of gaseous discharges resulting from kraft process using derivatives of undecylenic and/or undecynoic acid |
| 02/05/1997 | CN1142255A Multicomponent system for modifying decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system |
| 01/30/1997 | WO1997003244A1 Impregnation of fiber material |
| 01/30/1997 | WO1997003243A1 Impregnation of fibre material |
| 01/28/1997 | US5597446 Feeding wood chips to a pulping digester, electric motor moves rotor shaft in response to signal from controller |
| 01/21/1997 | US5595628 Production of pulp by the soda-anthraquinone process (SAP) with recovery of the cooking chemicals |
| 01/16/1997 | WO1997001666A1 Continuous digester |
| 01/15/1997 | CN1140215A Method for making multipurpose pulp from waste tobacco stalks, stems and leaves |
| 01/09/1997 | WO1997001074A1 Method and apparatus for treating material which conducts heat poorly |
| 01/09/1997 | WO1997000998A1 Method and apparatus for treating pulp in an indirect heat exchanger in connection with bleaching |
| 01/09/1997 | WO1997000997A1 Method and apparatus for treating pulp in an indirect heat exchanger after pulping |
| 01/08/1997 | CN1139719A Method for making paper utilizing tabacco stalk |
| 01/08/1997 | CN1033765C Method for mfg. bank-note paper with banana fiber |
| 01/07/1997 | US5591304 Delignifying brownstock with hemicellulases |
| 01/07/1997 | US5591303 Process for operating a digester |
| 01/01/1997 | CN1139464A Production of prehydrolyzed pulp |
| 12/31/1996 | US5589033 Production of prehydrolyzed pulp |
| 12/27/1996 | WO1996041915A1 Process for enhancing white liquor penetration into wood chips |
| 12/27/1996 | EP0750068A1 Treatment of gas effluents from a Kraft process using undecylenic and/or undecynoic acid derivatives |
| 12/24/1996 | US5587049 Low temperature; recirculation of liquids |
| 12/24/1996 | CA2067572C Method and apparatus to displace spent liquors in a digester |
| 12/19/1996 | WO1996041052A1 Modified organosolv pulping |
| 12/19/1996 | CA2221619A1 Modified organosolv pulping |
| 12/18/1996 | EP0748412A1 Impact of temperature and alkali charge on pulp brightness |
| 12/11/1996 | EP0746651A1 Polysulfide production in white liquor |
| 12/11/1996 | EP0746650A1 Pulping of fibrous plant materials and recovery of resultant by-products |
| 12/04/1996 | EP0745154A1 Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system |
| 11/19/1996 | US5575890 Method for selectively increasing the sulfide ion concentration and sulfidity of kraft cooking liquor during kraft cooking of wood |
| 11/07/1996 | WO1996035013A1 Method of producing a pulp of cellulosic material, the pulp itself and the use thereof |
| 11/07/1996 | DE19516151A1 Verfahren zur Herstellung einer Pulpe aus zellulosehaltigem Material, die Pulpe selbst und deren Verwendung A method for producing a pulp from cellulosic material, the pulp itself and the use thereof |
| 11/07/1996 | CA2217987A1 Process for producing a pulp from cellulose-containing material, the pulp itself and its use |
| 11/06/1996 | EP0672207B1 Viscose production process |
| 11/06/1996 | EP0662169B1 A process for the continuous digestion of cellulosic fiber material |
| 10/31/1996 | WO1996034143A1 Impregnation of cellulose-containing material with black liquor in a single vessel digester |
| 10/31/1996 | CA2217568A1 Impregnation of cellulose-containing material with black liquor in a single vessel digester |
| 10/30/1996 | EP0739433A1 Process for modifying, breaking down or bleaching lignin, materials containing lignin or coal |
| 10/30/1996 | CN1134727A 阿拉伯木聚糖降解酶 Arabinoxylan degrading enzyme |
| 10/24/1996 | WO1996033309A1 Method for co-refining dry urban wood chips and blends of dry urban wood chips and thermoplastic resins for the production of high quality fiberboard products |
| 10/24/1996 | WO1996033308A1 Pulping process |
| 10/24/1996 | CA2217874A1 Method for co-refining dry urban wood chips and blends of dry urban wood chips and thermoplastic resins for the production of high quality fiberboard products |
| 10/22/1996 | US5567280 Digester for cooking pulp having staggered circular screens for isothermal cooking |
| 10/17/1996 | WO1996029465A3 Method and device for process control in cellulose and paper manufacture |
| 10/16/1996 | CN1133371A Technology for producing strong strength paper board utilizing tobacco stem |
| 10/15/1996 | US5565061 Method and apparatus for removing scales deposited on the strainer of a pulp digester |
| 10/09/1996 | EP0688373B1 Process to produce chemi-mechanical pulp and/or chemi-thermo-mechanical pulp |
| 10/02/1996 | EP0734469A1 Implementation of dissolved solids profiling |
| 10/02/1996 | EP0649531B1 Determination and control of effective alkali in kraft liquors by ir spectroscopy |
| 09/26/1996 | WO1996029465A2 Method and device for process control in cellulose and paper manufacture |
| 09/26/1996 | DE19510008A1 Verfahren und Vorrichtung zur Prozeßführung bei der Zellstoff- und/oder Papierherstellung Method and apparatus for process control in pulp and / or paper-making |
| 09/26/1996 | CA2215956A1 Method and device for process management in the production of pulp and/or paper |
| 09/25/1996 | CN1131713A Production of high-strength corrugated base paper with straw pulp by neutral ammonium sulfite process |
| 09/18/1996 | EP0732134A1 Defoaming and/or deaerating composition for aqueous foaming media |
| 09/14/1996 | CA2171489A1 Defoaming and deaerating mixtures for aqueous media prone to foaming |
| 09/11/1996 | EP0730653A1 Arabinoxylan degrading enzymes |
| 09/03/1996 | US5552018 Stabilized peroxyacid with phosphonic acids and salts for lignin removal |
| 08/27/1996 | US5549789 Oxidation of lignin and polysaccharides mediated by polyoxometalate treatment of wood pulp |
| 08/27/1996 | CA2080677C Continuous treatment of small chips |
| 08/22/1996 | WO1996025553A1 Method of processing of lignocellulose materials by continuous pressure hydrolysis and corresponding equipment |
| 08/22/1996 | WO1996018770A3 Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system |
| 08/21/1996 | CN1129468A Process for modifying breaking down or bleaching lignin, materials containing lignin or like substances |
| 08/20/1996 | US5547012 Dissolved solids control in pulp production |
| 08/14/1996 | EP0468016B1 Process for preparing kraft pulp |
| 08/08/1996 | WO1996023568A1 Use of alkoxylation products of epoxidized fats as antifoaming agents |
| 08/08/1996 | DE19503062A1 Verwendung von Alkoxylierungsprodukten epoxydierter Fettstoffe als Entschäumer Use of alkoxylation products of epoxidized fatty substances as defoamers |
| 07/24/1996 | CN1127523A Multicomponent bleaching system |
| 07/17/1996 | CN1032322C Method for making artificial fibre pulp and xylitol using corn stalk |
| 07/16/1996 | US5536367 Pulp digester cleaning system |
| 07/16/1996 | US5536366 Digester system for implementing low dissolved solids profiling |
| 07/02/1996 | CA2049360C Improved method of producing pulp |
| 06/26/1996 | CN1125279A Pulping using bush as raw material and paper-making method |
| 06/25/1996 | US5529663 Delignification of lignocellulosic materials with peroxymonophosphoric acid |
| 06/25/1996 | US5529661 Process for controlling the flow of cellulosic fiber material through an impregnation vessel |
| 06/20/1996 | WO1996018770A2 Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system |
| 06/19/1996 | EP0717143A1 Multicomponents system for modifying decomposing or bleaching of lignin or materials containing it or similar components and the way to use it |
| 06/18/1996 | CA2079000C Method for the use of enzymes in processing and bleaching of paper pulp, and apparatus for use thereof |
| 06/17/1996 | CA2164394A1 Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances and processes for its use |
| 06/04/1996 | US5522958 Two-stage kraft cooking |
| 06/03/1996 | CA2163852A1 Utilization of oxidized white liquor |
| 05/23/1996 | WO1996015313A1 Black liquor impregnation in single-vessel hydraulic digester |
| 05/23/1996 | WO1996015312A1 Cellulose extraction process |
| 05/22/1996 | CN1122855A Coniferous bleached wood pulp prodn. by using waste paper bags as raw material |
| 05/15/1996 | DE4440186A1 Verfahren zur Gewinnung von Zellstoff A process for recovering pulp |
| 05/08/1996 | EP0610403B1 Liquid reservoir |
| 04/25/1996 | WO1996011733A1 Defoamer composition and method of using the same |