Patents
Sitemap › D21 - Paper-making; Production of cellulose › D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materials; Regeneration of pulping liquors; Apparatus therefor › D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265)
09/1983
09/20/1983US4405395 Tire breaker fabric formed from cord laid in zig-zag fashion
09/14/1983EP0088073A1 Method of treating pulp with plural oxygen stages
09/13/1983US4404101 Extraction device for removing liquid from a liquid-solid mixture
09/13/1983US4404061 Wood pulp; papermaking; easier separation
09/07/1983EP0087553A1 Process for producing half-bleached cellulose pulps
09/07/1983EP0087412A1 Method and apparatus for mixing pulp with gases.
09/06/1983US4402788 Multistage, chlorination, sodium hydroxide extraction
09/06/1983US4402750 Building materials and method for manufacturing same
09/06/1983CA1153232A2 Diffuser arrangements for paper pulp washing
09/06/1983CA1153161A1 Method for the production of greaseproof paper
08/1983
08/31/1983EP0087377A1 Process for selective bleaching of paper pulp obtained by recovery of illustrated magazines and papers obtained from this pulp
08/30/1983CA1153136A1 Synergistic blend of biocides
08/30/1983CA1152940A1 Delignification and bleaching of lignocellulosic pulp via photo-oxygenation
08/30/1983CA1152710A1 Pulp containing hydrophilic debonder and process for its application
08/23/1983US4400237 Process for bleaching cellulose with organic peracid
08/23/1983CA1152529A1 1,3-diformyloxy-2-bromo-2-nitropropane
08/23/1983CA1152266A1 Lumen-loaded paper pulp, its production and use
08/09/1983CA1151363A1 Process for the delignification of unbleached chemical pulp
08/02/1983CA1151213A1 Surface active quaternary ammonium compound suitable for treatment of textile and cellulose material
08/02/1983CA1150914A1 Amine-epichlorohydrin polymers for pitch control
07/1983
07/26/1983CA1150551A1 Method and apparatus for gas or liquid admixture
07/19/1983US4394267 Diffuser assembly
07/19/1983CA1235257B Method at bleaching ligno-cellulose containing material
07/19/1983CA1150011A1 Method at bleaching ligno-cellulose containing material
07/05/1983US4391670 Low energy TMP furnish of improved strength by ozonation and press drying
07/05/1983CA1149254A1 Black liquor soap possessing improved deresinating ability
07/05/1983CA1149219A1 Food products containing microfibrillated cellulose
07/05/1983CA1149111A1 Process for delignifying and/or bleaching cellulose pulp
06/1983
06/21/1983US4388938 Filter cleaning apparatus
06/21/1983CA1148498A1 Electrochemical corrosion protection of stainless steel bleach plant washers
06/14/1983US4388352 Microporous carrier
06/14/1983CA1147909A1 Method for delignifying and/or bleaching cellulose pulp
06/01/1983EP0079927A1 A method for treating a fibrous material and a plant for carrying out the method
05/1983
05/31/1983US4386119 Aqueous concentrate of boric acid or borate
05/24/1983US4384920 Method and apparatus for oxygen delignification
05/17/1983US4383889 Acrylic acid, polymer, inorganic polyphosphate
05/11/1983WO1983001598A1 A method for preparing fibrous hydrophilic fluff and the fluff prepared by the method
05/04/1983EP0078129A1 Method and apparatus for the continuous oxygen delignification of fibrous materials
04/1983
04/26/1983CA1145178A1 Process and apparatus for washing fibre stock
04/26/1983CA1145106A1 Procedure for improving properties of mechanical wood pulps
04/19/1983US4380568 Flame retardant heat insulating composition and method for preparing the same
04/19/1983CA1144711A1 Process for bleaching pulps by means of organic per acid
04/14/1983WO1983001263A1 An improved process for displacement washing of porous media
04/13/1983EP0076788A1 Use of substances giving off oxygen in reduction of dark colouring of pulp
04/05/1983CA1143913A1 Method for use in the defibration or refining of lignocellulose-containing fibrous materials
03/1983
03/31/1983WO1983001080A1 Use of substances giving off oxygen in reduction of dark colouring of pulp
03/29/1983US4378381 Suspensions containing microfibrillated cellulose
03/22/1983US4377440 Process for manufacturing of formed products
03/17/1983WO1983000887A1 Method of treating pulp with plural oxygen stages
03/17/1983WO1983000816A1 Method and apparatus for mixing pulp with oxygen
03/16/1983EP0073872A1 Chemical process in the manufacture of paper
03/01/1983US4375410 Reciprocating diffuser arrangements in an elongated vessel
02/1983
02/22/1983CA1141575A2 Diffuser arrangements for paper pulp washing
02/15/1983US4374171 Smolder and flame resistant insulation materials, composition and method
02/08/1983US4372813 Process for inhibiting the corrosion of equipment made of titanium
02/08/1983US4372812 Chlorine free process for bleaching lignocellulosic pulp
02/08/1983US4372811 Inhibition of degradation of carbohydrates
01/1983
01/12/1983EP0069573A1 Improved aqueous dispersion microbiocide composition containing methylene bis(thiocyanate)
12/1982
12/14/1982US4363699 A poly (hydroxyacrylate)
12/14/1982US4363697 Method for medium consistency oxygen delignification of pulp
12/14/1982CA1137257A1 Ozone effluent bleaching
12/14/1982CA1137256A1 Chemical treatments in bleaching stages which increase pulp brightness
12/09/1982WO1982004271A1 A method for treating a fibrous material and a plant for carrying out the method
12/07/1982CA1136804A1 Method of protecting organic or inorganic material from attack by microorganisms
11/1982
11/30/1982US4361463 Method in the production of dissolving pulp
11/09/1982CA1135101A1 Method for secondary heat recovery in batchwise cellulose digesting
11/02/1982US4357256 Bleaches, hexamethylenetetramine, sulfite
11/02/1982CA1134567A1 Mixer and process
11/02/1982CA1134566A1 Treating pulp with oxygen
11/02/1982CA1134562A1 Treating pulp with oxygen
11/02/1982CA1134561A1 Treating pulp with oxygen
11/02/1982CA1134560A1 Treating pulp with oxygen
11/02/1982CA1134559A1 Treating pulp with oxygen
11/02/1982CA1134558A1 Treating pulp with oxygen
10/1982
10/26/1982CA1134213A1 Process for the production of flame proof cellulosic material
10/19/1982CA1133660A1 Process for the preparation of cellulose fibres from pine
10/13/1982EP0062539A1 Method for oxygen delignification
10/05/1982CA1132760A1 Chlorine free process for bleaching lignocellulosic pulp
09/1982
09/22/1982EP0060277A1 Process to produce pulps.
09/15/1982EP0060104A1 Drying wood pulp
09/14/1982CA1131484A1 Process and improved installation for the production of paper making pulp
09/14/1982CA1131441A1 Method and device for flake-dryng of cellulose pulp
09/14/1982CA1131410A1 Additives for ozone bleaching
09/07/1982US4348256 Process for controlling the supply of delignifying and/or bleaching chemicals in the continuous delignification of lignocellulosic material
08/1982
08/31/1982US4347100 Strength of paper from mechanical or thermomechanical pulp
08/25/1982EP0058622A1 Reducing the deposition of pitch-like resins in the production of paper
08/25/1982EP0058621A1 Reducing the deposition of pitch-like resins in the production of paper
08/17/1982CA1130023A1 Method of treating pulp bleaching effluents
08/17/1982CA1129697A1 Process for controlling pulp washing systems
08/17/1982CA1129611A1 Process for delignifying and bleaching cellulose pulp
08/17/1982CA1129604A1 Method of producing fluffed pulp
08/10/1982US4343708 Method and equipment for thickening of suspension or pulp
08/10/1982US4343680 For cleaning up oil spills
08/10/1982CA1129161A1 Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
08/10/1982CA1129157A1 Process for improving the colour of sulphate pulp and deodorizing same
08/10/1982CA1129156A1 Bleaching stilbene yellow dyed wood pulp
08/10/1982CA1129155A1 Use of polyacrylic acid in pulp bleaching processes to preserve pulp strength and aid in brightness
08/04/1982EP0056859A1 Diffuser arrangements
07/1982
07/27/1982US4341807 Food products containing microfibrillated cellulose
07/21/1982EP0056263A1 A method for improving the washing of cellulose pulps produced from lignocellulosic material
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