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)
11/1991
11/26/1991US5068121 Product and process for preparing a plant fiber product
11/26/1991US5068009 Method of producing fluff pulp with improved defibration properties
11/14/1991WO1991017243A1 A cellulase preparation comprising an endoglucanase enzyme
11/11/1991WO1991017304A1 A method and a device for separating plastic particles from suspensions
11/11/1991CA2063602A1 Method and a device for separating plastic particles from suspensions
11/05/1991US5062964 Measuring air content of foam
11/05/1991CA1291601C Detackification of adhesive materials contained in secondary fiber
10/1991
10/30/1991EP0453728A2 Method for recycling cellulose fibres and medical or hygienic absorbent articles
10/30/1991EP0453489A1 Process for the flotation of fillers of waste paper in the presence of organic phosphoric esters.
10/22/1991US5059280 Method for removing agglomerated particles after dry fiberizing wastepaper
10/17/1991WO1991015627A1 A process for the bleaching of chemical pulp
10/15/1991US5057334 Process for recovery of cellulose
10/09/1991EP0451031A1 Process for treating recycled waters intented to dilute a paper pulp
10/08/1991US5055159 Biomechanical pulping with C. subvermispora
10/07/1991CA2039838A1 Treatment process of recycled water to be used for diluting pulp
10/03/1991WO1991014822A1 A process using cellulase for improving drainage properties of pulp
10/03/1991WO1991014821A1 Recycling of fibre products
10/03/1991WO1991014819A1 Enzymatic deinking process
10/01/1991US5052098 Means for removing wires from bales in particular waste paper bales
09/1991
09/25/1991EP0447887A1 Apparatus for the separation of air from flotation turbid liquids
09/25/1991EP0447673A1 Process of enzymatic bleaching of pulp
09/25/1991EP0447672A1 Process of treating waste paper by enzymatic de-inking
09/24/1991CA1289304C Process for the flotation of fillers from waste paper
09/21/1991WO1991014823A1 Process for the enzymatic bleaching of celluloses
09/21/1991WO1991014820A1 Process for processing waste paper with enzymatic removal of printing ink
09/21/1991CA2078346A1 Process for scrap paper recycling with enzymatical printing ink removal
09/21/1991CA2078345A1 Process for enzymatic bleaching of celluloses
09/19/1991WO1991013926A1 Compounds containing polyether chains and quaternary ammonium groups
09/19/1991WO1991013924A1 Water-soluble or water-dispersible compounds containing polyether chains and quaternary ammonium groups
09/19/1991WO1991013859A1 Compounds containing alkylene oxide units and quaternary ammonium groups
09/18/1991EP0446564A1 A deinking composition for water soluble flexographic printing inks
09/17/1991US5048765 Paper material refining apparatus
09/12/1991DE4007598A1 Wasserloesliche oder wasserdispergierbare verbindungen, enthaltend polyetherketten und quaternaere ammoniumgruppen Wasserloesliche or water-dispersible compounds containing polyether chains and quaternary ammonium groups
09/12/1991DE4007597A1 Wasserloesliche oder wasserdispergierbare, polyetherketten und quaternaere ammoniumgruppen enthaltende verbindungen Wasserloesliche or water-dispersible, polyether chains, and quaternary ammonium group-containing compounds
09/12/1991DE4007596A1 Water-miscible cpds. with alkylene oxide units and quat. ammonium gps. - obtd. by quaternisation of tert. amine(s) with alkyl halide(s), sulphate(s), phosphate(s), etc. then with epihalohydrin(s)
09/11/1991EP0445161A1 De-inking of old papers
09/11/1991EP0445160A1 De-inking of old papers
09/04/1991EP0444788A1 Treatment of coated broke
09/03/1991US5045181 Apparatus for removing ash from repulped wastepaper
08/1991
08/29/1991DE4105873A1 Regeneration of secondary cellulose fibres - by adding disinfectant to the suspension for absorbent medical and sanitary applications
08/24/1991CA2030197A1 Deinking composition for water soluble flexographic printing inks
08/21/1991EP0442183A1 Conversion of pulp and paper mill waste solids to papermaking pulp
08/14/1991CA2010042A1 Conversion of pulp and paper mill waste solids to papermaking pulp
08/08/1991WO1991011424A1 Alkoxylated compounds produced from epoxylated carboxylic acid derivatives
08/07/1991CN1053608A Alkoxylating compounds prepared by epoxy carboxylic acid derivatives
08/03/1991WO1991011553A1 A process for the bleaching of chemical pulp
08/03/1991CA2075187A1 Process for the bleaching of chemical pulp
08/01/1991DE4002213A1 Alkoxylation prod. prepd. from epoxide derivs.
07/1991
07/25/1991WO1991010724A1 Preparation exhibiting enzymatic delignification activity, a method of producing the same, and applications thereof
07/24/1991EP0407501A4 Method and composition for deinking recycled paper pulp
07/20/1991WO1991010773A1 Process for producing pulp
07/20/1991CA2049069A1 Method for producing pulp
07/11/1991CA2073436A1 Preparation exhibiting enzymatic delignification activity, a method of producing the same, and applications thereof
06/1991
06/26/1991EP0434084A1 Deinking agent for regenerating waste paper
06/25/1991CA1285105C Deinking composition for reclamation of waste paper
06/23/1991CA2032809A1 Deinking agent for regenerating waste paper
06/19/1991EP0433258A1 Procedure for the production of pulp
06/19/1991EP0432928A2 Froth flotation apparatus and method
06/13/1991CA2031972A1 Procedure for the production of pulp
06/12/1991EP0431337A1 Process for the desilication of waste liquid
06/12/1991CA2030420A1 Froth flotation apparatus and method
06/11/1991CA1284799C Method of and means for hydrodynamic mixing
06/05/1991EP0430915A1 Procedure for the production pulp
05/1991
05/29/1991EP0429422A1 Procedure for the production of pulp
05/28/1991CA2030836A1 Procedure for the production of pulp
05/22/1991EP0428257A2 Flotation machine for de-inking
05/18/1991CA2030186A1 Procedure for the production of pulp
05/09/1991WO1991007542A1 Hydrolysis of resin in pulp
05/09/1991CA2072993A1 Hydrolysis of resin in pulp
05/08/1991EP0426434A1 Sugar beet pectins and their use in comestibles
05/02/1991WO1991005906A1 Aqueous dispersions containing carboxylic and/or resin acids for de-inking printed waste paper
05/02/1991CA2029022A1 Sugar beet pectins and their use in comestibles
05/01/1991CN1051062A Deinking and bleaching secondary fiber
04/1991
04/28/1991WO1991006701A1 Method of processing used paper in the presence of hydroxysulphonate salts
04/28/1991WO1991006217A1 A process of combatting microorganisms
04/28/1991CA2071823A1 Process for regenerating wastepaper in the presence of hydroxysulfaonate salts
04/25/1991DE3935151A1 Recycling paper waste sorter - has structured angle sections to give effective waste separation without fibre loss
04/25/1991DE3934893A1 Waessrige, erdalkaliseifen und/oder erdalkaliharzseifen enthaltende dispersionen zum deinken von bedruckten altpapieren Aqueous alkaline earth metal soaps, and / or erdalkaliharzseifen containing dispersions for deinking printed wastepaper
04/25/1991DE3934882A1 Waessrige, carbonsaeuren und/oder harzsaeuren enthaltende dispersionen zum deinken von bedruckten altpapieren Aqueous carboxylic acids and / or harzsaeuren containing dispersions for deink printed wastepaper
04/24/1991EP0423606A1 Process for the preparation of domestic, industrial or similar waste for the extraction of cellulose materials
04/23/1991US5009746 Method for removing stickies from secondary fibers using supercritical CO2 solvent extraction
04/23/1991US5009745 Treating cellulose-containing wastes
04/20/1991WO1991005905A1 Aqueous dispersions containing alkaline earth soaps and/or alkaline earth resin soaps for de-inking printed waste paper
04/20/1991CA2069333A1 Aqueous dispersions containing alkaline earth soaps and/or alkaline earth resin soaps for deinking printed wastepaper
04/19/1991WO1991005908A1 Method for bleaching with reduced organic chlorides
04/19/1991CA2044279A1 Method for bleaching with reduced organic chlorides
04/17/1991CA2027385A1 Method for processing domestic, industrial and other similar waste with the production of a cellulose material
04/16/1991US5008254 Sugar beet pectins and their use in comestibles
04/10/1991EP0421843A1 Process for treating a papermaking pulp with an enzymatic preparation to make paper or cardboard
04/10/1991EP0420860A1 Process and apparatus for the manufacture of pulp for paper, board, fiberboard and similar products.
04/03/1991EP0419500A1 Method for deinking wastepaper.
04/03/1991CA2026652A1 Papermaking process usding enzymatic preparation for the making of paper or cardboard
03/1991
03/26/1991US5002633 Conversion of pulp and paper mill waste solids to papermaking pulp
03/21/1991WO1991003599A1 Collector chemical for deinking of waste paper
03/21/1991WO1991003596A1 Use of compounds containing polyalkylene oxide chains and nitrogen for removing printing ink from recycled printed paper and/or paper processing water
03/20/1991EP0418201A2 Bleaching wood pulp with enzymes
03/19/1991US5000822 Process for the preparation of imitation leather from natural hemp and the product thereof
03/19/1991CA1281509C Process for decolorizing bulk-dyed paper and self copying paper
03/13/1991EP0417030A1 An apparatus for removing ash from repulped wastepaper
03/13/1991CA2025079A1 Bleaching wood pulp with enzymes
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