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 5 - Other processes for obtaining cellulose, e.g. cooking cotton linters
Patents for D21C 5 - Other processes for obtaining cellulose, e.g. cooking cotton linters (5,432)
11/1983
11/16/1983EP0094022A2 Rotor for a screening apparatus for the purification of pulp suspensions, particularly in the paper industry
11/08/1983US4414258 Ribbon made of brown paper strips and twisted paper filaments
10/1983
10/26/1983EP0092124A1 Process for preparing paper pulps from a random mixture of printed waste paper
10/25/1983US4411737 Post-treatment with sodium sulfite, sodium sulfide and sodium carbonate
10/25/1983CA1155610A1 Process for improving the quality of pulp obtained from wastepaper
10/04/1983CA1154562A1 Reclaiming process
09/1983
09/21/1983EP0089169A1 Fibre recovery from carbonless paper broke
09/06/1983CA1153275A1 Hydrophobic silica or silicate, compositions for containing the same, and methods for making and using the same
08/1983
08/31/1983EP0087377A1 Process for selective bleaching of paper pulp obtained by recovery of illustrated magazines and papers obtained from this pulp
08/16/1983US4399028 Froth flotation apparatus and method
08/16/1983CA1151812A1 Methods of deinking secondary fibers
08/02/1983CA1150913A1 Use of polyalkylene oxides for the separation of cellulose fibres
07/1983
07/19/1983CA1150010A1 Baled wastepaper product containing a deinking chemical
07/05/1983US4391878 Cellulose fiber web, crosslinking, unsaturated amic acid copolymer
06/1983
06/28/1983US4390395 Process for the regeneration of waste paper
06/28/1983CA1148705A1 Deinking waste electrophotography copy paper
06/22/1983EP0081973A1 Polymer comprising mers of esters and use thereof in coating compositions, binders or adhesive; esters and use thereof as monomers, reactive diluents, modifiers or crosslinkers
05/1983
05/31/1983US4385997 Method and apparatus for preconditioning laminated paper for recycling
05/03/1983US4381969 Process for the regeneration of waste paper
04/1983
04/12/1983CA1144310A1 Deinking of newsprint
03/1983
03/08/1983US4376011 Carboxylic acid ester, froth flotation
02/1983
02/09/1983EP0071431A1 Bonded fibrous wet strength webs
01/1983
01/25/1983US4370199 Enzymatic catalyzed biocide system
01/11/1983US4368101 Series of flotation cells
12/1982
12/22/1982EP0067333A1 Process for deinking waste printed papers
12/15/1982EP0067076A1 Process for the continuous manufacture in an aqueous environment of fibrous webs containing latex or a similar composition and/or a phenoplastic or aminoplastic, webs so obtained and their optional reuse
12/15/1982EP0066894A1 Process for deinking printed waste paper
12/07/1982US4362600 Sulfate fibers, flocculation
11/1982
11/23/1982US4360439 Composition for the de-inking of printed waste paper by the washing process
11/23/1982US4360402 Process and apparatus for preparing waste paper for reuse
10/1982
10/26/1982US4356058 Process for the reprocessing of papers
09/1982
09/22/1982EP0060467A1 Production of cellulose from wood or other lignocellulosic plants by microbiological decomposition of lignocellulose
08/1982
08/31/1982US4347128 Flotation apparatus for de-inking pulp suspensions
08/31/1982US4347099 In the presence of an aqueous alkaline solution containing a carboxylated polymer
08/10/1982US4343679 Process for reclaiming waste paper
08/10/1982CA1129156A1 Bleaching stilbene yellow dyed wood pulp
07/1982
07/22/1982WO1982002414A1 Hydrophobic silica or silicate compositions for containing the same and methods for making and using the same
07/13/1982CA1127609A1 Waste pulping apparatus
07/13/1982CA1127356A1 Method and apparatus for preconditioning laminated paper for recycling
06/1982
06/08/1982CA1124962A1 Process of bleaching peat moss and resulting product
06/01/1982US4332638 Method and apparatus for the recovery of a suspension of fibrous material from mixed waste paper
06/01/1982CA1124459A1 Alkaline surfactant system for de-inking printed fibrous material
05/1982
05/25/1982US4331534 Method of and arrangement for the de-inking of pulp suspensions
05/11/1982CA1123161A1 Removal of bitumen from waste paper
04/1982
04/27/1982US4326912 Dispersing a monomer to form drops, then polymerization and removal
03/1982
03/09/1982CA1119361A1 Method for the production of unbleached sulphite cellulose or bleached cellulose from a defibrated knot pulp
03/02/1982US4317701 Pulper
01/1982
01/27/1982EP0044658A1 Improved method of increasing the accessibility of cellulosic material in lignocellulosic materials
01/19/1982US4311552 Deinking of newsprint
12/1981
12/29/1981CA1115006A1 Process for the reprocessing of papers
12/22/1981US4307121 Process for preparing cellulose
12/22/1981CA1114562A1 Method of recovering fibres
12/02/1981EP0040873A1 Process for the regeneration of waste paper
11/1981
11/04/1981EP0038829A1 Deinking waste electrophotography copy paper
10/1981
10/27/1981US4297322 Equipment for treating and resource recovery from solid waste
10/14/1981EP0037513A1 Flotation apparatus for deinking fibrous suspensions
10/13/1981CA1110411A1 Recycling by repulping wax and resin impregnated paperboards in black liquor
09/1981
09/02/1981EP0034725A2 Dyestuffs containing imidazolylethylene groups and their use
07/1981
07/23/1981WO1981002030A1 Use of polyalkylene oxides for the separation of cellulose fibres
07/22/1981EP0032364A1 Use of polyalkylene oxides for the separation of cellulose fibres
07/07/1981US4277328 Flotation apparatus for separating impurities from a fiber suspension
06/1981
06/30/1981US4276118 Deinking waste electrophotography copy paper
06/23/1981US4275167 Preferential degradation of lignin in gramineous materials
06/10/1981EP0030057A1 Method of deinking paper pulp and paper products obtained employing this method
05/1981
05/19/1981US4268352 Method of reducing soluble starch in broke repulping using a dual polymer combination
05/06/1981EP0027922A1 Process for the removal of pigments from waste-paper
05/06/1981EP0027817A1 Baled wastepaper product containing a deinking chemical
04/1981
04/29/1981EP0027670A1 Process for regenerating waste paper
04/28/1981US4264412 Process of recovering fibres
04/28/1981CA1099858A1 Recovery of fibre from laminated carton boards
04/16/1981WO1981001022A1 Deinking waste electrophotography copy paper
04/08/1981EP0026616A1 Process for improving the quality of pulp obtained from wastepaper
04/07/1981US4260452 Depithing, pulping
02/1981
02/24/1981CA1096515A1 Process and installation for eliminating by flotation impurities in the form of solid particles contained in a liquid
02/10/1981US4249701 Waste pulping apparatus
01/1981
01/20/1981CA1093880A1 Recovery of cellulosic fibres from foil laminated materials
01/13/1981US4244777 Bleaching stilbene yellow dyed wood pulp
01/07/1981EP0020601A1 A process for de-inking paper pulp
01/06/1981US4243478 Process for treating waste paper with hardened water
12/1980
12/23/1980US4240800 Absorbent fibers which are free of sugars
11/1980
11/13/1980WO1980002411A1 Baled wastepaper product containing a deinking chemical
11/11/1980CA1089272A1 Apparatus for deinking waste paper pulp
11/04/1980US4231841 Salt of a fatty acid, nonionic and an anionic surfactant, sodium carboxymethyl cellulose, alkaline inorganic salt
10/1980
10/28/1980US4230525 Process for improving qualities of paper
10/28/1980US4230524 Oxidation
10/21/1980US4229493 Baled wastepaper product containing a deinking chemical
10/07/1980CA1087176A1 Method for treatment of corn hulls
09/1980
09/23/1980US4224102 Removal of bitumen from waste paper
08/1980
08/06/1980EP0013758A1 Process for deinking printed waste paper
07/1980
07/29/1980US4214982 Process and device for removing printer's ink from a fiber suspension
07/09/1980EP0013027A1 Process for deinking printed waste paper
05/1980
05/29/1980WO1980001085A1 A process for de-inking paper pulp
05/27/1980US4204906 Method of separating fusible plastics from solid waste
05/27/1980CA1078351A1 Paper sorting method and apparatus
04/1980
04/08/1980CA1074967A1 Method of deinking printed waste cellulosic stock
03/1980
03/20/1980WO1980000423A1 Method and device for cleaning suspension fibres
03/18/1980US4193838 Removal of thermoplastic resin coatings from paperboard with halogenated hydrocarbon vapors
02/1980
02/12/1980US4188259 Recovery of fibre from laminated carton boards
01/1980
01/01/1980CA1068959A Apparatus for pulping and grading waste material
12/1979
12/11/1979CA1068019A1 Process for cleaning of a dispersion or dispersed particles
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