D21C 3 - Pulping cellulose-containing materials

Patents for D21C 3 - Pulping cellulose-containing materials (5,020)
12/1994
12/23/1994	CA2124500A1 Method for improving pulp washing efficiency
12/22/1994	WO1994029510A1 Process for modifying, breaking down or bleaching lignin, materials containing lignin or like substances
12/22/1994	WO1994029425A2 Multicomponent bleaching system
12/22/1994	CA2182182A1 Process for modifying, breaking down or bleaching ligin, materials containing ligin or like substances
12/08/1994	WO1994028236A1 A pulp production process
12/07/1994	EP0627030A1 Modified digestion of paper pulp followed by ozone bleaching
12/07/1994	EP0627029A1 Pulp bleaching apparatus and method
11/1994
11/15/1994	US5364502 Kraft pulp, measuring sulfate and thiosulfate concentration
11/10/1994	WO1994025668A1 Dissolved solids control in pulp production
11/10/1994	WO1994025137A1 Aqueous anti-foaming agent dispersions
11/10/1994	CA2424682A1 Dissolved solids control in pulp production
10/1994
10/27/1994	WO1994024363A1 Scraper device
10/27/1994	WO1994024362A1 Method of continuously cooking pulp
10/26/1994	CN1094108A Method for producing solvable pulp
10/18/1994	CA1332526C Process for the continuous digestion of cellulosic fiber material
10/13/1994	WO1994023120A1 Cooking system for hardwood
10/13/1994	CA2159999A1 Cooking system for hardwood
10/05/1994	EP0502052B1 A process for the preparation of cooking liquors having high sulphidity for sulphate pulp cooking
09/1994
09/20/1994	CA1332023C Process for cooking and bleaching pulp
09/15/1994	WO1994020670A1 Process for producing chemomechanical and/or chemothermomechanical wood products
09/15/1994	CA2157886A1 Process for producing chemomechanical and/or chemothermomechanical wood products
09/13/1994	US5346591 Apparatus for treatment of chips with heated black liquor
09/07/1994	CN1091792A Process for continuous cooking of pulp
09/01/1994	WO1994019533A1 Straining device
08/1994
08/18/1994	WO1994018382A1 Method for producing chemi-thermomechanical pulps (ctmp)
08/18/1994	CA2117799A1 Method for producing chemi-thermomechanical pulps (ctmp)
08/17/1994	EP0454757B1 A method in the manufacture of cellulose pulp
08/16/1994	US5338405 Production of fiber pulp by impregnating the lignocellulosic material with an aqueous alcoholic SO2 solution prior to defibration
08/16/1994	US5338402 Process for preparing a bleached chemithermomechanical pulp
08/10/1994	CN1090617A Paper, paper plate and cellulose plate pulping method
08/10/1994	CN1090616A Pulping method
07/1994
07/12/1994	US5328564 Eliminates use of chlorinated solvents
07/05/1994	US5326499 Antifoams for the paper industry, based on oil-in-water emulsions
07/05/1994	US5326433 Multi-level sulfide content white liquor production and utilization in cellulose pulping
06/1994
06/22/1994	CA2111921A1 Formulated composition of pulp digesting assistant agent
06/14/1994	US5320757 Method of inhibiting calcium oxalate scale deposition
06/09/1994	WO1994012719A1 Viscose production process
05/1994
05/28/1994	CA2109749A1 Method of controlling biotechnological pulp and paper processing using noble gases
05/26/1994	WO1994011567A1 Method of continuously cooking pulp
05/26/1994	WO1994011566A1 Process for continuous cooking of pulp
05/26/1994	WO1994011565A1 Digester for continuous cooking of fibre material
05/26/1994	WO1994011564A1 Digester for continuous cooking of fibre material
05/26/1994	CA2149524A1 Method of continuously cooking pulp
05/03/1994	CA1329046C Delignification of non-woody biomass
04/1994
04/28/1994	WO1994009203A1 Completely countercurrent cook continuous digester
04/28/1994	CA2144078A1 Completely concurrent cook continuous digester
04/27/1994	EP0593744A1 Process for the recovery of processing chemicals from the black liquor in the production of cellulose by organo-solvent processes
04/27/1994	EP0593743A1 Production of cellulose by the soda-anthraquinone process (sap) with recovery of the boiling chemicals
04/26/1994	US5306392 Process for preparing pulp using potassium-based alkaline solution
04/13/1994	CN1085281A Method for mfg. bank-note paper with banana fiber
04/06/1994	EP0590433A2 Control process for the production of pulp by control of pressure and temperature
04/06/1994	EP0590430A2 Device for the automatic control of a processing plant by means of fuzzy logic control having preferred applications
04/05/1994	US5300195 Continuous vertical digester apparatus
03/1994
03/29/1994	US5298120 Composition for enhancing the pulping of wood chips
03/29/1994	US5298118 Preparation of bleached chemithermomechanical pulp
03/29/1994	CA1328034C High sulfidity cook for paper pulp using black liquor for sulfonization of steamed chips
03/09/1994	EP0585955A1 Repulping paper and paperboard
03/08/1994	CA1327474C Extended delignification in pressure diffusers
03/02/1994	EP0584675A1 Wood pulping with acetic acid and formic acid
03/02/1994	EP0584161A1 White liquor preparation and pulping process.
02/1994
02/26/1994	CA2104765A1 Wood pulping with acetic acid with the addition of formic acids
02/16/1994	EP0420860B1 Process and apparatus for the manufacture of pulp for paper, board, fiberboard and similar products
02/16/1994	CN1082115A Organosolv process for hydrolytic decomposition of lignocellulosic and strach materials
02/03/1994	WO1994002680A1 Hydrocyclone photo-reactor
02/01/1994	US5282931 Determination and control of effective alkali in kraft liquors by IR spectroscopy
01/1994
01/26/1994	EP0579708A1 Lipase-catalyzed ester hydrolysis
01/20/1994	WO1994001769A1 Determination and control of effective alkali in kraft liquors by ir spectroscopy
01/12/1994	EP0578305A1 Process of delignification of a chemical pulp
01/12/1994	EP0578303A1 Process for the delignification of a chemical paper pulp
01/12/1994	CN1023502C Process and apparatus for mannfacture of pulp for paper, board, fiberboard and similar products
01/11/1994	US5277760 Process for the manufacture of pulp for paper, and fiberboard products using alkaline cooking chemical and oxygen in a closed, continuous and pressurized tube system
01/07/1994	CA2099828A1 Delignification process for chemical pulp
01/07/1994	CA2099513A1 Delignification process for chemical pulp
12/1993
12/22/1993	CN1079789A Manufacture technology of sea-weed fibre
12/15/1993	EP0573497A1 Recycling waste cellulosic material.
12/15/1993	EP0415959B1 Delignification of non-woody biomass
12/14/1993	CA2025454C Process and mechanism to empty pulping digester
12/09/1993	WO1993024621A1 Novel enzyme preparations and methods for their production
12/08/1993	EP0572388A1 Ctmp-process.
12/02/1993	CA2070133A1 Reducing chips to fibers in continuous digesters to facilitate lignin extraction
11/1993
11/18/1993	EP0569555A1 Solid state culture of white rot fungi
11/18/1993	EP0569526A1 Pulping of lignocellulosic materials and recovery of resultant by-products
11/16/1993	CA1324377C Lignin derived quinonic compound mixtures useful in the wood pulping process
11/16/1993	CA1324283C Acid purification of product from alkaline peroxide processing of nonwoody lignocellulosic substrates
11/11/1993	WO1993022493A1 Polysulfide production in white liquor
11/11/1993	WO1993022492A1 Production of cellulose by the soda-anthraquinone process (sap) with recovery of the boiling chemicals
11/11/1993	WO1993022490A1 Process for the recovery of processing chemicals from the black liquor in the production of cellulose by organo-solvent processes
11/11/1993	CA2131377A1 Polysulfide production in white liquor
11/10/1993	CN1078276A Method for prodn. of printing paper pulp made from all cotton stalk by hot mechanical grinding
11/03/1993	EP0502852B1 Displacement heating in continuous digesters
11/02/1993	CA1323790C Continuous cooking pulp quality enhancements
10/1993
10/20/1993	CN1022499C Method and apparatus to displace digester from both end
10/20/1993	CN1022498C Process for mechanism to empty pulping digester
10/19/1993	US5254286 Composition for controlling scale in black liquor evaporators
10/14/1993	WO1993020279A1 Method of producing pulp
10/13/1993	CN1077239A Method for manufacture of furniture by mould pressing fiber
10/12/1993	US5252183 Process of pulping and bleaching fibrous plant material with tert-butyl alcohol and tert-butyl peroxide
10/12/1993	CA1322828C Method of delignification of cellulosic fiber material
10/05/1993	US5250152 Ethoxylated alcohol and dialkylphenol surfactants as Kraft pulping additives for reject reduction and yield increase
10/01/1993	CA2092948A1 Treatment of bleach plant filtrates

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