| Patents for D21C 5 - Other processes for obtaining cellulose, e.g. cooking cotton linters (5,432) |
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| 11/24/1993 | EP0570757A1 Method and apparatus for separating paper fiber and plastics from mixed waste materials and products obtained thereby |
| 11/18/1993 | DE4321521A1 Waste paper processing removing large proportion of wax content - by decomposing waste paper in pulp dissolver, precleaning, opt. diluting with water and floating suspension to separate wax |
| 11/11/1993 | WO1993022499A1 Wood-free pulp and white paper product |
| 11/11/1993 | WO1993022491A1 Deinking chemicals |
| 11/11/1993 | CA2134079A1 Deinking chemicals |
| 11/11/1993 | CA2133406A1 Wood-free pulp and white paper product |
| 11/10/1993 | EP0568599A1 Method for avoiding pitch troubles by use of thermostable lipase. |
| 11/09/1993 | US5259969 For reuse of waste paper, solvents, nonionic and anionic surfactants, water |
| 11/02/1993 | US5258099 Office wastepaper deinking process using fatty alcohols |
| 10/29/1993 | CA2091273A1 Detackification of adhesive materials contained in secondary fiber using vinylpyrrolidone based polymers |
| 10/28/1993 | WO1993021376A1 Treatment of cellulosic material and compositions for use in this |
| 10/28/1993 | WO1993020917A1 Procedure and means for processing liquids |
| 10/28/1993 | CA2133958A1 Procedure and means for processing liquids |
| 10/26/1993 | US5256252 Method for controlling pitch deposits using lipase and cationic polymer |
| 10/20/1993 | EP0566327A1 Method of bleaching de-inked pulp |
| 10/20/1993 | EP0566284A2 Method for producing a delignified papermaking fiber from recycled, high lignin content, waste paper and product thereof |
| 10/20/1993 | EP0565920A1 Procedure for manufacturing paper from seaweed and paper thus obtained |
| 10/14/1993 | WO1993020192A1 DELIGNIFYING PREPARATION EXHIBITING α-L-ARABINOFURANOSIDASE ACTIVITY, PRODUCTION AND APPLICATION THEREOF |
| 10/13/1993 | EP0565109A1 Process for glueing wood fragments |
| 10/07/1993 | CA2234143A1 Blade-coated paper and method of preparation thereof |
| 09/30/1993 | WO1993019171A1 THERMOSTABLE XYLANASES FROM $i(THERMOTOGA) |
| 09/28/1993 | US5248388 Use of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaper |
| 09/23/1993 | DE4306936A1 Waste paper processing - using container to breakdown material by heat and pressure followed by dilution and sorting in rotating drum with perforated mantle |
| 09/15/1993 | EP0560421A1 Process for the discolouration and bleaching of waste paper |
| 09/10/1993 | CA2091224A1 Process for removing colour and bleaching used coloured papers |
| 09/08/1993 | EP0558908A1 Process and treatment of waste paper |
| 09/08/1993 | EP0558512A1 Treatment of absorbent sanitary paper products. |
| 09/07/1993 | US5242585 Apparatus and method for deinking waste paper pulp |
| 09/05/1993 | CA2090987A1 Process for recycling waste paper |
| 09/02/1993 | WO1993017177A1 Wastepaper deinking process |
| 09/02/1993 | DE4206206A1 Waste paper recycling - uses electrolyte and foaming to develop a flocculant to remove dirt as a scum from the surface of processing water |
| 09/01/1993 | EP0557651A1 Integrated pulping process of waste paper yielding tissue-grade paper fibers |
| 08/26/1993 | DE4204915A1 Reprocessing waste paper - in presence of peroxide(s) with mixts. of polyfunctional carboxylic acids and polymeric cpds. as flotation stabilisers |
| 08/24/1993 | US5238533 Flotation process for removing fillers from wastepaper in the presence of polymers and copolymers |
| 08/19/1993 | WO1993016226A1 Oxygen delignification of waste cellulosic paper products |
| 08/19/1993 | DE4204540A1 Removal of printing ink from printed paper - involves treatment with a poly:ol ester followed by flotation and/or washing |
| 08/19/1993 | CA2128225A1 Oxygen delignification of waste cellulosic paper products |
| 08/11/1993 | EP0554285A1 Process for recovering raw materials from paper-industry mechanical waste sludges. |
| 08/10/1993 | US5234545 Process for regenerating wastepaper in the presence of hydroxysulfonate salts |
| 08/10/1993 | US5234544 Using mixture of oxygen, alkali and surfactant; papermaking |
| 08/10/1993 | US5234543 Deinking method using ink agglomeration |
| 08/10/1993 | CA1321158C Lignin decomposing bacteria having high activity and selectivity |
| 08/05/1993 | WO1993015260A1 Method of removing the ink from recycled printed paper |
| 08/05/1993 | DE4203000A1 Verfahren zur entfernung von druckfarben aus bedrucktem altpapier A process for the removal of printing inks from printed wastepaper |
| 08/04/1993 | EP0553196A1 Hydrolysis of resin in pulp. |
| 08/04/1993 | EP0553138A1 Use of polyether-chain-containing compounds produced from epoxidised carboxylic acid derivatives for removing printing inks from waste paper and/or paper circuit water. |
| 08/04/1993 | CN1074935A Xylanase for biobleaching |
| 08/03/1993 | US5232551 For reuse of newspapers |
| 07/27/1993 | US5231022 Cellulase isolated from bacillus ferm bp-3431 or a mutant strain thereof |
| 07/20/1993 | US5228953 Flexographic and xerographic inks |
| 07/13/1993 | US5227020 Process for regenerating wastepaper using a double layer hydroxide formed in situ |
| 07/13/1993 | US5227019 Wastepaper deinking process |
| 07/06/1993 | US5225046 Wastepaper deinking process |
| 06/29/1993 | US5223592 Process for polymerization of itaconic acid |
| 06/29/1993 | US5223089 Method of deinking waste paper using a fatty acid polyoxyalkylene ester |
| 06/23/1993 | EP0547433A1 Method of making calcium-hydrosilicate-bound shaped bodies |
| 06/23/1993 | EP0547100A1 Process for treatment of lignocellulosic pulp and apparatus for performance of the process. |
| 06/22/1993 | US5221433 Deinking wastepaper using alkoxylation product of carboxylic acid containing an oh group and alkylene oxide |
| 06/16/1993 | EP0546721A1 Treating lignocellulosic materials |
| 06/16/1993 | EP0546045A1 Enzymes with xylanolytic activity. |
| 06/16/1993 | EP0545958A1 A process for hydrolyzing hemicellulose by enzymes produced by trichoderma reesei. |
| 06/15/1993 | CA2083765A1 Process for the production of calcium hydrosilicate bounded shaped articles |
| 06/10/1993 | WO1993011296A1 Method and enzymatic preparation for treatment of cellulose pulps |
| 06/10/1993 | CA2125166A1 Method and enzymatic preparation for treatment of cellulose pulps |
| 06/08/1993 | US5217573 Pulping paper and water to form a slurry, adjusting the ph adding a polyoxyethylene glycol-rosin surfactnat, heating such that ink agglomerates and removing ink particles from slurry |
| 06/02/1993 | EP0464057B1 Process for processing waste paper |
| 06/02/1993 | EP0453489B1 Process for the flotation of fillers of waste paper in the presence of organic phosphoric esters |
| 06/02/1993 | EP0453449B1 Process for the flotation of fillers of waste paper in the presence of tensides containing sulphonate groups |
| 05/27/1993 | WO1993010224A1 A cholesterol esterase acting lipase from pseudomonas cepacia |
| 05/27/1993 | WO1993010158A1 Gel production from plant matter |
| 05/27/1993 | WO1993010157A1 Cereal extracts |
| 05/27/1993 | DE4139777A1 Recycled paper waste water - comprises sludge of water and solids to which resin is added and mixed to give material for boards or flooring |
| 05/25/1993 | US5213661 Treatment with oxidized white liquor, recycling waste paper |
| 05/25/1993 | US5213660 Secondary fiber cellulose product with reduced levels of polychlorinated dibenzodioxins and polychlorinated dibenzofurans |
| 05/19/1993 | EP0542147A1 Cleaning and bleaching of secondary fiber |
| 05/18/1993 | US5211809 Recycled paper |
| 04/29/1993 | WO1993008275A1 Thermostable xylanase from a strain of rhodothermus marinus |
| 04/28/1993 | EP0538603A1 Process for the removal of fine contaminants from waste paper pulp |
| 04/21/1993 | EP0538177A1 Xylanases from Rhodothermus strains and their use in the treatment of liquocellulosic pulp |
| 04/21/1993 | EP0537416A1 Process for the treatment of pulp |
| 04/20/1993 | US5203965 Utilization of sawdust for pulp production |
| 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 | CA2080886A1 Method of removing fine contaminants from used paper fibre material |
| 04/15/1993 | WO1993007332A1 Method for enzymatic treatment of lignocellulosic materials, in particular cellulose pulps |
| 04/15/1993 | WO1993007331A1 Improved deinking method using ink agglomeration |
| 04/15/1993 | CA2120949A1 Method for enzymatic treatment of lignocellulosic materials, in particular cellulose pulps |
| 04/14/1993 | EP0536580A1 Application of enzymes and flocculants for enhancing the freeness of paper making pulp |
| 04/14/1993 | CN1070970A Oxygen color stripping in secondary fiber recovery |
| 04/13/1993 | US5202249 Delignification, brightening pulps |
| 04/06/1993 | US5200034 Agglomeratin of electrostatic toner particles using ethoxylated, propoxylated, esterified or alkanolamide surfactant so that particles can be separated from pulp fibers |
| 04/05/1993 | CA2079730A1 Process for improving delignification selectivity of a chemical papermaking pulp |
| 04/01/1993 | WO1993006184A1 PRESSURE SENSITIVE ADHESIVE COMPOSITION WHICH IS REPULPABLE UNDER ACIDIC pH CONDITIONS |
| 04/01/1993 | CA2115670A1 Pressure sensitive adhesive composition which is repulpable under acidic ph conditions |
| 03/30/1993 | US5198074 Process to produce a high quality paper product and an ethanol product from bamboo |
| 03/25/1993 | DE4133683A1 Verfahren zur aufbereitung von bedrucktem altpapier Method for processing printed waste paper |
| 03/24/1993 | EP0532533A1 Novel enzyme preparations and methods for their production. |
| 03/21/1993 | WO1993006295A1 Method of processing printed waste-paper |
| 03/18/1993 | WO1993004784A1 Improved apparatus and method for deinking waste paper pulp |
| 03/18/1993 | CA2117071A1 Improved apparatus and method for deinking waste paper pulp |
| 03/03/1993 | EP0327576B1 Process for producing cellulose from lignin-containing raw materials |