| Patents for D21C 3 - Pulping cellulose-containing materials (5,020) |
|---|
| 01/17/1999 | CA2243228A1 Preparation of mechanical wood pulps with reduced energy |
| 01/13/1999 | EP0889957A1 Enzyme multimer and process of producing same |
| 01/13/1999 | CN1041645C Method for producing viscose pulp |
| 01/12/1999 | US5859236 Ultrasonic agitation of slurry |
| 12/30/1998 | WO1998059107A1 Method in connection with the pretreatment of comminuted fibrous material |
| 12/30/1998 | CN1203642A Method and apparatus for continuously preparing cellulose pulp |
| 12/23/1998 | WO1998058119A1 Method and installation for the continuous preparation of paper pulp from lignocellulose textile fibres |
| 12/23/1998 | EP0593744B1 Process for the recovery of processing chemicals from the black liquor in the production of cellulose by organo-solvent processes |
| 12/23/1998 | CA2296170A1 Method and installation for the continuous preparation of paper pulp from lignocellulose textile fibres |
| 12/17/1998 | WO1998056981A1 Modified cellulosic fibers and fibrous webs containing these fibers |
| 12/17/1998 | WO1998056980A1 Improved displacement batch digester cooking system |
| 12/17/1998 | WO1998056979A1 Method for continuous cooking in a single-vessel digester |
| 12/17/1998 | WO1998056978A1 Method of improving bleachability and runability of kraft pulps |
| 12/16/1998 | CN1201851A Cotton pulp and other coarse pulp clean production |
| 12/15/1998 | US5849559 Arabinoxylan degrading enzymes |
| 12/15/1998 | US5849151 Continuous digester having means for implementing low dissolved solids profiling |
| 12/15/1998 | US5849150 Low dissolved solids control in pulp production |
| 12/02/1998 | EP0861115A4 Defoamer/antifoam composition |
| 12/01/1998 | CA2005087C Method for avoiding pitch troubles |
| 11/25/1998 | EP0863250A4 Process for preparing a pulp-cooking solution |
| 11/18/1998 | EP0777780B1 Sulphite digestion process |
| 11/11/1998 | CN1198492A Pollution-free pulping technology in paper-making |
| 11/05/1998 | WO1998049390A1 A wood delignification chemical process using ammonium magnesium bisulphite as the active reagent |
| 11/04/1998 | EP0579708B1 Lipase-catalyzed ester hydrolysis |
| 10/27/1998 | US5827401 Screen system for a continuous digester |
| 10/21/1998 | EP0785815A4 Defoamer composition and method of using the same |
| 10/21/1998 | EP0748412B1 Impact of temperature and alkali charge on pulp brightness |
| 10/20/1998 | US5824188 Method of controlling the pressure of a continuous digester using an extraction-dilution |
| 10/20/1998 | US5824187 Method for the continuous cooking of pulp |
| 10/14/1998 | CN1195727A Batch and continuous steaming-boiling technology and equipment by sulfate process |
| 10/06/1998 | US5817381 Food packaging |
| 09/29/1998 | CA2114692C Scale deposit inhibitor for kraft digesters and method for controlling scale deposition in kraft digesters |
| 09/23/1998 | EP0865484A1 Novel xylanase composition and method for production thereof |
| 09/16/1998 | EP0864689A2 Additive composition and process for reducing anthraquinone requirements in pulping of lignocellulosic material |
| 09/16/1998 | EP0864011A1 Method and apparatus for continuously preparing cellulose pulp |
| 09/16/1998 | EP0745154B1 Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system |
| 09/16/1998 | CN1193061A Cooling-pulping paper-making method |
| 09/09/1998 | EP0863250A2 Process for preparing a pulp-cooking solution |
| 09/09/1998 | EP0862669A1 Continuous digester |
| 09/09/1998 | EP0782642A4 Method and apparatus for the continuous production of cellulosic pulp |
| 09/02/1998 | EP0861347A1 Method of obtaining cellulose fibre material from a plant substrate containing calcium pectinate |
| 09/02/1998 | EP0861115A1 Defoamer/antifoam composition |
| 09/01/1998 | US5800674 Method and apparatus for improving a batch cooking process |
| 08/26/1998 | EP0832319A4 Process for enhancing white liquor penetration into wood chips |
| 08/26/1998 | EP0830475A4 Modified organosolv pulping |
| 08/20/1998 | WO1998036124A1 Process for treating a cellulose-containing substance |
| 08/19/1998 | CN1190683A High strength corrugated raw paper pulp production technology |
| 08/13/1998 | WO1998035091A1 Method and device for the continuous cooking of pulp |
| 08/13/1998 | WO1998035090A1 Continuous method for producing pulp with spent liquor impregnation |
| 08/12/1998 | EP0739433B1 Process for modifying, breaking down or bleaching lignin, materials containing lignin or coal |
| 08/06/1998 | WO1998033970A1 Process for producing fibrous materials with improved properties |
| 08/06/1998 | DE19704054A1 Verfahren zur Herstellung von Faserstoffen mit verbesserten Eigenschaften A process for producing fibrous materials with improved properties |
| 08/06/1998 | CA2279524A1 Process for producing fibrous materials with improved properties |
| 08/05/1998 | CN1189556A Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances and processes for its use |
| 08/04/1998 | US5788812 Method of recovering furfural from organic pulping liquor |
| 07/30/1998 | WO1998032913A1 Method for making chemical paper pulp |
| 07/30/1998 | WO1998032912A1 Batch cooking with black liquor pretreatment |
| 07/30/1998 | DE19702769A1 Economical one-stage delignification of organic material without using sulphur compound |
| 07/30/1998 | CA2278181A1 Batch cooking with black liquor pretreatment |
| 07/29/1998 | CN1188830A Biological delignification-machinery pulping technology |
| 07/29/1998 | CN1188829A Digesting and screening technology method for rice and wheat straw pulping |
| 07/23/1998 | WO1998031871A1 Method for fractionating cereal straw, in particular wheat and barley |
| 07/21/1998 | US5783037 System and method for operating a pulp mill |
| 07/14/1998 | US5779856 Producing cellulose pulp from comminuted cellulose fibers using continuous digester |
| 07/07/1998 | US5777059 Silicone compositions and uses thereof |
| 07/01/1998 | EP0850333A2 Process and arrangement for monitoring cellulose digestion |
| 06/30/1998 | CA2058312C Refining assisting agent and refining method using the same |
| 06/23/1998 | US5770010 Pulping process employing nascent oxygen |
| 06/17/1998 | CN2284257Y High effective diluent for auxiliary agent of paper making |
| 06/16/1998 | US5766413 Process for isothermal cooking pulp in a continuous digester |
| 06/10/1998 | CN1184183A Method of modified organosolv pulping |
| 06/10/1998 | CN1184182A Clean papermaking process |
| 05/27/1998 | CN1183126A Method of producing a pulp of cellulosic material, the pump itself and the use thereof |
| 05/20/1998 | CN1182148A Digestion-less and sieving-free chemical pulp-making method producing no nuisance |
| 05/14/1998 | WO1998020198A1 Method of producing pulp using single-stage cooking with formic acid and washing with performic acid |
| 05/06/1998 | CN1180768A 一种草类纤维原料的“化学－机械”制浆系统 Kind of grass fiber raw materials, "Chemistry - Mechanical" pulping system |
| 04/30/1998 | WO1998017857A1 Removal of metals from treatment fluids in a cellulose pulp mill |
| 04/29/1998 | EP0837965A1 Impregnation of fiber material |
| 04/28/1998 | US5744066 Defoaming and deaerating mixtures for aqueous media prone to foaming |
| 04/28/1998 | US5744005 Self-supporting straining device for a continuous digester |
| 04/22/1998 | CN1179492A Method for refining composite body paper |
| 04/16/1998 | WO1998015687A1 Method and apparatus for pulping with controlled heating to improve delignification and pulp strength |
| 04/15/1998 | CN1179188A Method and device for process control in cellulose and/or paper manufacture |
| 04/14/1998 | CA1339809C Oxidation of white liquor the presence of lime mud |
| 04/09/1998 | WO1998014270A1 Hydrolysis and fractionation of lignocellulosic biomass |
| 04/08/1998 | EP0834051A1 Method and apparatus for treating material which conducts heat poorly |
| 04/07/1998 | US5736006 Steaming comminuted cellulose fibers, slurrying with kraft liquor, pressurizing, hydraulically feeding to treatment vessesl, heating by contacting with hot kraft cooking liquid |
| 04/07/1998 | US5736005 Scraper device for a continuous digester |
| 04/02/1998 | WO1998013547A1 Cooking of chemical pulp in sulphur-free liquor containing a delignification-accelerating compound |
| 04/01/1998 | EP0832319A1 Process for enhancing white liquor penetration into wood chips |
| 04/01/1998 | CN2277415Y Air-float deinking tower |
| 03/25/1998 | EP0830475A1 Modified organosolv pulping |
| 03/25/1998 | EP0821749A4 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 |
| 03/25/1998 | EP0673453B1 Process for continuous cooking of pulp |
| 03/25/1998 | CN1177031A Method for making paper for newspaper from willow wood |
| 03/24/1998 | US5730837 Method of separating lignocellulosic material into lignin, cellulose and dissolved sugars |
| 03/19/1998 | WO1998011294A1 Delignification process |
| 03/18/1998 | CN1037790C Producing process of nap pulp-board for sanitary napkins |
| 03/17/1998 | US5728265 Process for enhancing white liquor penetration into wood chips by contacting the chips with a mixture of the white liquor and a polymethylalkyl siloxane |
| 03/04/1998 | CN1174911A Sulfite digestion liquid |