| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 12/05/1985 | WO1985005386A1 Method of bleaching fibre pulp for the production of paper and p aperboard |
| 12/03/1985 | US4556494 Simplified construction, withdrawal screens, fluid introductory structures |
| 12/03/1985 | CA1197509A1 Polymeric quaternary ammonium compounds and their uses |
| 11/27/1985 | EP0162179A1 Method and device for washing fibrous-material suspensions recovered from waste paper |
| 11/06/1985 | EP0160069A1 Rotatable disc filter. |
| 10/30/1985 | EP0159371A1 A method for preparing an absorbent fibrous fluff, the fibrous fluff prepared by the method, and an absorbent device containing the fibrous fluff |
| 10/29/1985 | US4549929 Tin compounds for brightness improvement of jack pine ultra |
| 10/29/1985 | US4549415 Continuous counterflow belt washer |
| 10/29/1985 | CA1195811A1 Alkaline-oxygen delignification of cellulose pulp at atmospheric pressure |
| 10/17/1985 | EP0148220A4 Low consistency ozone bleaching reactor. |
| 10/15/1985 | US4547263 Method for obtaining useful products from green pseudostem, including papermaking pulp plantain |
| 10/01/1985 | US4544448 Adjustable |
| 10/01/1985 | US4544447 Reversal takes place directly at wedging section |
| 10/01/1985 | CA1194281A1 Absorbent polymer-fiber composites and method for preparing the same |
| 10/01/1985 | CA1194254A1 Diallyl dimethyl ammonium chloride polymers for pitch control |
| 09/25/1985 | EP0155928A1 Mechanical pulp hydrosulfite bleaching |
| 09/24/1985 | US4543155 Method for bleaching wood pulp including dissolving oxygen into the dilution water of an extraction stage |
| 09/24/1985 | CA1193808A1 Chemical pulp having improved strength, drainability and beatability, and a process of making said pulp |
| 09/24/1985 | CA1193807A1 Method and apparatus for controlled addition of alkaline chemicals to an oxygen delignification reaction |
| 09/10/1985 | US4539827 For drawing and flushing suspension liquor from a slurry |
| 09/10/1985 | CA1193053A1 Bleaching process |
| 09/04/1985 | EP0153717A2 A method for producing improved high-yield pulps |
| 09/04/1985 | EP0153671A2 Stabilized aqueous alkalised composition of sodiumdithionite |
| 09/03/1985 | US4539071 Biocide |
| 09/03/1985 | CA1192704A1 Process for bleaching chemical pulp |
| 08/27/1985 | US4537656 Method for delignifying or bleaching cellulose pulp wherein chlorine is added to recycle liquor to regenerate chlorine dioxide |
| 08/27/1985 | US4537655 Process for producing and flash drying high yield mechanical cellulose pulp with steam and condensate recycle |
| 08/27/1985 | CA1192353A1 Drying wood pulp |
| 08/07/1985 | EP0151097A1 A method for removing resin from a paper pulp process liquor |
| 08/06/1985 | CA1191381A1 Method and apparatus for rinsing filter cake |
| 07/31/1985 | EP0149772A2 Pulp thickening utilizing stationary screens |
| 07/30/1985 | US4532007 Maintaining aerobic conditions in closed white water system at specified redox potential by introducing oxygen to inhibit growth of anaerobic microorganisms |
| 07/17/1985 | EP0148712A1 Process for bleaching paper pulps with hydrogen peroxide |
| 07/17/1985 | EP0148382A2 Method for fiber retrieval from aqueous streams |
| 07/17/1985 | EP0148220A1 Low consistency ozone bleaching reactor |
| 07/16/1985 | US4529482 Apparatus for the treatment of pulp having oscillating distributing wiper blades |
| 07/16/1985 | US4529479 Circulation, displacement |
| 07/16/1985 | CA1190360A1 Catalyzed alkaline peroxide delignification |
| 07/16/1985 | CA1190359A1 Modified cellulosic fibers and method for preparation thereof |
| 07/10/1985 | EP0147564A1 Apparatus for cleaning waste paper stock |
| 07/02/1985 | US4526651 Enhanced brightness |
| 07/02/1985 | CA1189686A1 Diffuser assembly |
| 06/25/1985 | CA1189456A1 Filter cleaning apparatus |
| 06/11/1985 | US4522716 Separating wood pulp from wood slurry |
| 06/10/1985 | EP0087412A4 Method and apparatus for mixing pulp with gases. |
| 06/06/1985 | WO1985002424A1 Pulp washer |
| 06/04/1985 | US4521315 Pulp thickening utilizing stationary screens |
| 05/21/1985 | US4518610 Microbicidal/microbistatic compositions and use thereof employing mixtures of 4,5-dichloro-1,2-dithiol-3-one and alkylenebisthiocyanate |
| 05/15/1985 | EP0141355A1 Process for bleaching ground wood pulp |
| 05/15/1985 | EP0141138A1 Process for the treatment of cellulosic materials with oxidising agents |
| 05/14/1985 | US4517053 Apparatus for sampling paper pulp liquor |
| 05/14/1985 | CA1186856A1 Blending of hardwood asplund pulp (htmp) with softwood thermomechanical pulp (tmp) in making a low energy tmp furnish of improved strength by ozonation and press drying |
| 05/08/1985 | EP0140804A1 Hypochlorite treatment of chemical paper pulps |
| 05/08/1985 | EP0140218A2 Stable, inert organic liquid-containing sodium dithionite compositions and their use |
| 05/08/1985 | EP0139736A1 Pulp washing process. |
| 05/08/1985 | EP0139633A1 Reactor to perform chemical reactions with dimensional reduction of solid materials. |
| 05/07/1985 | US4515655 Method of bleaching paper pulp by blending chlorine with a flow volume of paper pulp slurry |
| 04/30/1985 | CA1186105A1 Ozone bleaching of cellulosic materials |
| 04/25/1985 | WO1985001672A1 Rotatable disc filter |
| 04/23/1985 | US4512888 Apparatus for removal by flotation of solid particles from liquid |
| 04/17/1985 | EP0137611A2 Absorbent vegetable material and process for making same |
| 04/16/1985 | US4511088 Liquid distribution device |
| 04/16/1985 | CA1185472A1 In-line washing system |
| 04/09/1985 | US4510020 Lumen-loaded paper pulp, its production and use |
| 04/02/1985 | CA1184709A1 Method and apparatus for oxygen delignification |
| 03/26/1985 | US4506834 Method and device for dispersing material |
| 03/19/1985 | US4506081 Micorbiocides, corrosion resistance, delamination, flocculants, softners, antistatic, demulsifiers |
| 03/19/1985 | US4505775 Method for preparation of cationic cellulose |
| 03/19/1985 | US4505750 Foundry mold and core sands |
| 03/19/1985 | US4505137 Apparatus for washing paper pulp |
| 03/06/1985 | EP0133846A1 Method at anaerobic wastewater treatment |
| 03/05/1985 | US4502918 Two-stage chemical treatment of mechanical wood pulp with sodium sulfite |
| 03/05/1985 | US4502171 Procedure for washing cellulose |
| 02/26/1985 | US4501662 Wire machine, for dewatering stock suspensions |
| 02/19/1985 | US4500546 Suspensions containing microfibrillated cellulose |
| 02/19/1985 | CA1182673A1 Method of pipe line washing |
| 02/05/1985 | CA1181908A1 Treatment for improving saturability in normal saturating furnish |
| 01/23/1985 | EP0132128A1 Process for making pulp sheets containing debonding agents |
| 01/22/1985 | CA1181204A1 Method and system for reacting ozone with pulp |
| 01/08/1985 | CA1180511A1 Process for the delignifying bleaching of cellulose pulp |
| 01/08/1985 | CA1180510A1 Process for removing residual lignin in chemical cellulose pulp |
| 01/08/1985 | CA1180509A1 Process for activating cellulose pulp with no and/or no.sub.2 and oxygen in the presence of nitric acid and then delignifying bleaching the activated cellulose pulp |
| 01/03/1985 | WO1985000046A1 Low consistency ozone bleaching reactor |
| 01/01/1985 | US4491521 Dewatering apparatus |
| 01/01/1985 | US4491501 Drawing, filtration, flushing |
| 12/27/1984 | EP0129078A1 Manufacture of paper using copolymers of 2-acrylamido-2-methylpropane sulfonic acid for increasing rate of dewatering of high mechanical/thermomechanical pulp furnishes |
| 12/27/1984 | CA1179807A Process for digesting cellulosic material |
| 12/19/1984 | EP0128190A1 Method of peroxide bleaching cellulose-containing material. |
| 12/18/1984 | US4488932 Hammer milling, dispersion in aqueous foam, papermaking |
| 12/11/1984 | US4487656 Process for bleaching paper pulp using melamine as a viscosity stabilizer |
| 12/11/1984 | US4487634 Suspensions containing microfibrillated cellulose |
| 12/04/1984 | US4486501 Coating with thermoplastic polymer and coupler |
| 12/04/1984 | CA1178756A1 Alkaline extraction initiated ozone bleaching of kraft pulp |
| 11/27/1984 | US4484980 Papermaking |
| 11/21/1984 | EP0125851A1 Absorbent non-delignified wood pulp |
| 11/20/1984 | US4483740 Method for recovery of reusable chemicals from C102 generator effluent |
| 11/13/1984 | CA1177608A1 Two-stage chemical treatment of mechanical wood pulp |
| 11/06/1984 | US4481118 Method and apparatus for rinsing filter cake |
| 11/06/1984 | US4481077 Process for preparing microfibrillated cellulose |
| 11/06/1984 | US4481076 Redispersible microfibrillated cellulose |