| Patents for D21C 3 - Pulping cellulose-containing materials (5,020) |
|---|
| 09/29/1993 | CN1076743A Method for making pulp of newsprint and book paper by shattering cotton-rod, removing black bark and pith |
| 09/21/1993 | CA1322366C Continuous leaching of lignin or hemicellulose and lignin from steam pretreated lignocellosic particulate material |
| 09/01/1993 | CN1075761A Application of magesium oxide as buffer solution in ammonium sulfite straw pulping process |
| 09/01/1993 | CN1021980C Displacement heating in continuous digesters |
| 08/24/1993 | CA1321449C Process for producing kraft pulp for paper |
| 08/19/1993 | WO1993016227A1 Modified digestion of paper pulp followed by ozone bleaching |
| 08/19/1993 | CA2130180A1 Modified digestion of paper pulp followed by ozone bleaching |
| 08/11/1993 | EP0554391A1 Pulping process. |
| 08/10/1993 | US5234546 Polysulfide production in white liquor |
| 08/05/1993 | WO1993015261A1 Pulping of fibrous plant materials and recovery of resultant by-products |
| 08/05/1993 | CA2116544A1 Pulping of fibrous plant materials and recovery of resultant by-products |
| 08/04/1993 | EP0553649A1 Process for delignifying a cellulose pulp |
| 08/04/1993 | EP0498821B1 Method and apparatus to displace spent liquors in a digester |
| 08/01/1993 | CA2088281A1 Process for delignifying raw cellulose |
| 07/22/1993 | WO1993014260A1 Pulp bleaching apparatus and method |
| 07/13/1993 | US5227021 Method for producing pulp using medium consistency mixer for defiberizing pulp |
| 07/06/1993 | CA1319853C Dietary fiber and method of making |
| 06/24/1993 | WO1993012287A1 Process for the manufacture of bleached paper pulp |
| 05/25/1993 | US5213662 Treatment of chips with high temperature black liquor to reduce black liquor viscosity |
| 05/13/1993 | WO1993009059A1 Liquid reservoir |
| 04/28/1993 | EP0538576A1 Process for recovery of chemicals from the pulping liquor |
| 04/20/1993 | US5203964 Process for producing cellulose from lignin containing raw materials using an enzyme or microorganism while monitoring and maintaining the redox potential |
| 04/20/1993 | US5203963 Producing paper pulp; steaming, impregnating with sulfur liquor, pressurizing, cooking cellulosic fibers |
| 04/14/1993 | CN1070969A Use of wash press for pulp alkali addition process |
| 04/05/1993 | CA2079730A1 Process for improving delignification selectivity of a chemical papermaking pulp |
| 03/30/1993 | US5198074 Process to produce a high quality paper product and an ethanol product from bamboo |
| 03/17/1993 | EP0532491A1 Treatment of organic sulfur gases especially in kraft pulping systems and processes |
| 03/17/1993 | EP0531713A1 Antifoams for paper industry based on emulsions of oil in water |
| 03/11/1993 | CA2060819A1 Treatment of organic sulfur gases especially in kraft pulping systems and processes |
| 03/10/1993 | EP0530881A1 Use of wash press for pulp alkali addition process |
| 03/04/1993 | WO1993004232A1 A process for the continuous digestion of cellulosic fiber material |
| 03/04/1993 | CA2115578A1 A process for the continuous digestion of cellulosic fiber material |
| 03/03/1993 | EP0327576B1 Process for producing cellulose from lignin-containing raw materials |
| 02/24/1993 | CN1069304A Environmentally improved process for bleaching lignocellnlosic materials |
| 02/23/1993 | US5188707 Process for chemically hardening wood |
| 02/17/1993 | EP0527294A1 Treatment of chips with black liquor |
| 02/15/1993 | CA2075875A1 Use of wash press for pulp alkali addition process |
| 02/15/1993 | CA2068165A1 Treatment of chips with black liquor |
| 02/02/1993 | US5183535 Process for preparing kraft pulp using black liquor pretreatment reaction |
| 01/05/1993 | US5176796 Avoiding pitch troubles using acylgerol lipase |
| 12/30/1992 | EP0520452A1 Batch process for preparing kraft pulp |
| 12/30/1992 | CN1067462A Ammonium sulfite process for production of cotton pulp |
| 12/16/1992 | EP0518851A1 Reducing chips to fibres in continuous digesters to facilitate lignin extraction |
| 12/16/1992 | EP0517988A1 A process to obtain a molding pulp starting from short fiber cellulose |
| 12/16/1992 | CN1067080A Low-loss and energy-saving recovery and steam-boiling technology for chemically making non-wooden pulp |
| 12/09/1992 | EP0517689A1 Multi-level sulfide content |
| 12/09/1992 | EP0517453A1 Controlling scale in black liquor evaporators |
| 12/08/1992 | CA1311093C Cellulosic matter delignification process |
| 12/01/1992 | CA2070078A1 Controlling scale in black liquor evaporators |
| 11/26/1992 | WO1992020856A1 White liquor preparation and pulping process |
| 11/26/1992 | WO1992008842A3 Method for producing dietary fibers from nonwoody lignocellulosic substrates by oxidation |
| 11/24/1992 | CA1310452C Method for producing chemi-thermomechanical pulp |
| 11/08/1992 | CA2167946A1 Method for the use of enzymes in processing and bleaching of paper pulp, and apparatus for the use thereof |
| 11/03/1992 | CA1309562C Chemimechanical pulping process employing sodium carbonate and sodium sulphite |
| 10/31/1992 | CA2139246A1 Process for bleaching of lignocellulose-containing pulp |
| 10/29/1992 | WO1992018638A1 Lipase-catalyzed ester hydrolysis |
| 10/22/1992 | DE4117049A1 Recycling lye extracted from cellulose@ mfg. plant - has recycling system incorporated to separate valuable material from lye for re-use in plant |
| 10/15/1992 | WO1992017592A1 Cloning and expression of dna molecules encoding arabinan-degrading enzymes of fungal origin |
| 10/15/1992 | CA2084056A1 Cloning and expression of genes encoding arabinan-degrading enzymes of fungal origin |
| 10/14/1992 | EP0508064A1 Process for the delignification of cellulose-containing material |
| 09/30/1992 | EP0506190A1 Cloning and expression of genes encoding arabinan-degrading enzymes of fungal origin |
| 09/29/1992 | CA1308113C Combined process for thermally and chemically treating lignocellulose-containing biomass and for producing furfural and cellulose-containing fiber masses |
| 09/29/1992 | CA1308112C Combined process for thermally and chemically treating lignocellulose-containing biomass and for producing furfural |
| 09/29/1992 | CA1308096C Porphyrins, their syntheses and uses thereof |
| 09/17/1992 | WO1992015751A1 Recycling waste cellulosic material |
| 09/16/1992 | EP0503304A1 Process for the delignification of cellulose-containing material |
| 09/16/1992 | EP0503303A1 Process for bleaching pulp in aliphatic monocarboxylic acids |
| 09/16/1992 | EP0502852A1 Displacement heating in continuous digesters. |
| 09/15/1992 | US5147503 Recycling waste cellulosic material with sodium sulphide digestion |
| 09/09/1992 | EP0502052A1 A process for the preparation of cooking liquors having high sulphidity for sulphate pulp cooking. |
| 09/09/1992 | CA2062475A1 Process for the delignification of cellulose containing raw materials |
| 09/09/1992 | CA2062474A1 Process for the delignification of cellulose containing raw materials |
| 09/09/1992 | CA2062325A1 Process for the bleaching of cellulose in aliphatic monocarbonic acids |
| 09/02/1992 | EP0500674A1 A method of producing cellulosic pulp |
| 08/29/1992 | CA2061940A1 Aluminum hydroxychloride as pitch control agent |
| 08/20/1992 | WO1992013960A1 Solid state culture of white rot fungi |
| 08/20/1992 | CA2101057A1 Solid state culture of white rot fungi |
| 08/19/1992 | CN1063732A Paper making method by all stem pulp making |
| 08/18/1992 | US5139617 Hydrolysis, dissolving of the lignin by neutral sulfite cooking with anthraquinone as catalyst |
| 08/13/1992 | DE4103983A1 Raising degree of hydrolysis in cellulose@ and paper industry - by use of microorganism producing anthraquinone or metabolite as catalyst |
| 08/12/1992 | EP0498330A1 Process for the delignification of fibrous plant material |
| 08/07/1992 | CA2060798A1 Process for the delignification of cellulosic fibre raw materials |
| 08/05/1992 | EP0483163A4 Environmentally improved process for bleaching lignocellulosic materials |
| 08/02/1992 | WO1992013849A1 Pulping of lignocellulosic materials and recovery of resultant by-products |
| 08/02/1992 | CA2101754A1 Pulping of lignocellulosic materials and recovery of resultant by-products |
| 07/22/1992 | CN1062939A Method for making artificial fibre pulp and xylitol using corn stalk as material |
| 07/08/1992 | CN1062564A Technology for producing semi-chemical pulp of tobacco stalk with sulfite |
| 07/07/1992 | US5127993 Ethylene oxide-propylene oxide copolymer or adduct as nonionic surfactant |
| 07/01/1992 | EP0492600A1 Refining assisting agent and refining method using the same |
| 07/01/1992 | EP0492364A1 Control system to monitor the production of pulp in a discontinuous digester |
| 06/12/1992 | CA2031947A1 Process and apparatus for the manufacture of pulp for paper, board, fiberboard and similar products |
| 06/10/1992 | CN1061820A Process for desilicifying black liquor from straw pulp single-stage paper making |
| 06/03/1992 | EP0487793A1 Explosion process for preparing pulp for paper making |
| 06/02/1992 | CA1302018C Lignocellulosic material bleeching process |
| 05/29/1992 | WO1992008842A2 Method for producing dietary fibers from nonwoody lignocellulosic substrates by oxidation |
| 05/27/1992 | CN1061452A Pulpingy process |
| 05/26/1992 | CA1301412C Method in the activation of lignocellulosic material with a gas containing nitrogen dioxide |
| 05/20/1992 | CN1061253A Ammonium sulfite and calcium hydroxide pulping method |
| 05/13/1992 | EP0485150A1 Pulping processes, extraction of lignin and composition of matter for use in such processes |
| 05/12/1992 | CA1300324C Process for pulping lignocellulose-containing material |