| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 01/13/1988 | EP0252615A2 Process for controlling pitch deposition from pulp in papermaking systems |
| 01/12/1988 | US4718980 Interstage treatment of mechanical pulp |
| 01/07/1988 | EP0251787A1 Apparatus and method for thickening pulp and paper stock |
| 01/07/1988 | EP0251675A2 Absorbent structures containing individualized crosslinked fibers and disposable articles incorporating such structures |
| 01/07/1988 | EP0250422A1 Process for preparing bleached pulp from lignocellulosic raw material. |
| 01/05/1988 | CA1231184A1 Method at anaerobic wastewater treatment |
| 12/29/1987 | US4715931 Hydroxylated dicarboxylic acid |
| 12/29/1987 | CA1230708A1 Process for making pulp sheets containing debonding agents |
| 12/17/1987 | WO1987007662A1 An apparatus for treating fibre material containing liquid |
| 12/15/1987 | CA1230205A1 Process and apparatus for bleaching of pulp |
| 12/09/1987 | EP0087412B1 Method and apparatus for mixing pulp with gases |
| 12/03/1987 | WO1987007314A1 Procedure for prebleaching chemical cellulose pulps |
| 12/02/1987 | EP0247307A1 Process for decolourizing papers, coloured in the mass, and carbonless copying papers |
| 12/01/1987 | US4710267 Process for reducing discoloration and/or tackiness in processing waste paper fibers |
| 12/01/1987 | CA1229757A1 Pulp washing process |
| 12/01/1987 | CA1229702A1 Methods of decontaminating secondary fiber |
| 11/25/1987 | EP0246314A1 Bleaching process and composition |
| 11/25/1987 | CN86104281A Vertical pulp thickener |
| 11/24/1987 | US4708771 Papermaking |
| 11/19/1987 | WO1987006962A1 Arrangement for liquid treatment of pulp |
| 11/19/1987 | WO1987006826A1 Imidazolinium compounds for softening and conditioning fibers |
| 11/17/1987 | CA1229334A1 Biomass fractionation process |
| 11/17/1987 | CA1229254A1 Multi-stage pulp washing within a batch digester |
| 11/11/1987 | EP0244408A1 A process and apparatus for continuously treating pulp with a treating liquid |
| 11/10/1987 | US4705600 Method for the treatment of pulp with liquid |
| 10/27/1987 | US4702807 Electrochemical process for bleaching wood pulp using chlorate and a redox catalyst |
| 10/27/1987 | CA1228452A1 Treatment of cellulosic materials with oxidising agents |
| 10/22/1987 | WO1987006282A1 Dewatering press |
| 10/22/1987 | WO1987006281A1 Apparatus for liquid treatment of pulp |
| 10/13/1987 | US4699292 For a wood pulp bleaching vessel |
| 10/08/1987 | WO1987005954A1 Method of processing mechanical pulp |
| 10/06/1987 | US4698133 Water soluble methyl cellulose |
| 10/06/1987 | US4697292 Shower pipes for rotary drum filter |
| 09/30/1987 | EP0239312A1 Method and apparatus for washing pulp |
| 09/29/1987 | CA1227304A1 Delignification of pulp |
| 09/22/1987 | US4695386 Process for the decolorization of pulp mill process streams |
| 09/15/1987 | CA1226718A1 Stabilized sodium dithionite formulations containing inert organic liquids, and the use of these formulations |
| 09/11/1987 | WO1987005346A1 High temperature, high consistency bleaching |
| 09/01/1987 | US4690895 Use of rLDM™ 1-6 and other ligninolytic enzymes in the bleaching of kraft pulp |
| 08/25/1987 | US4689118 Cross-linked pore containing microfibrillated cellulose prepared by freezing and solvent exchange |
| 08/25/1987 | US4689117 Thermomechanical digestion process for enhancing the brightness of cellulose pulp using bleachants |
| 08/25/1987 | US4689045 Graft polymerization of addition monomer |
| 08/12/1987 | EP0232015A1 Pitch control aid |
| 08/12/1987 | EP0231505A1 Antimicrobial agent |
| 08/12/1987 | EP0231275A1 Use of ligninolytic enzymes in paper pulp production. |
| 08/11/1987 | CA1225267A1 Method and apparatus for washing paper pulp |
| 08/05/1987 | EP0230737A1 Membrane pervaporation process for obtaining a chlorine dioxide solution |
| 08/05/1987 | EP0230427A1 Double sided mixer |
| 08/04/1987 | US4684442 For paper pulp |
| 07/30/1987 | WO1987004474A1 Screen cylinder |
| 07/21/1987 | CA1224353A1 Procedure for washing cellulose |
| 07/14/1987 | US4680088 Process for removing ink particles from paper products |
| 07/06/1987 | EP0211945A4 Method and apparatus for alkaline delignification of lignocellulosic fibrous materials. |
| 06/30/1987 | US4676961 Stabilized water-containing sodium dithionite formulations which have been rendered alkaline |
| 06/30/1987 | US4676901 Rotating disc filter |
| 06/24/1987 | EP0226495A1 Process and apparatus for bleaching paper pulp |
| 06/24/1987 | EP0226114A1 Process for bleaching and delignification of cellulosic products |
| 06/24/1987 | EP0226113A2 Method and apparatus for measuring the chemical content of liquors used in the bleaching of cellulose pulp |
| 06/24/1987 | EP0225940A1 Process for the production of disposable hygienic goods and fluff pulp for using in this process |
| 06/23/1987 | US4675076 Method for brightening pulp |
| 06/23/1987 | CA1223216A1 Drum filter assembly for extracting filtrate from a fiber suspension |
| 06/16/1987 | US4673460 Using ethoxylated alkylphenol, sulfonated fatty acid |
| 06/16/1987 | EP0225638A1 A method for delignification of pulp |
| 06/16/1987 | EP0139736B1 Pulp washing process |
| 06/16/1987 | CA1222899A1 Continuous counterflow belt washer |
| 06/09/1987 | CA1222603A1 Polution free pulping process using recycled wash effluent from multiple bleach stages to remove black liquor and recovering sodium hydroxide from the black liquor |
| 06/04/1987 | WO1987003313A1 Bleaching process and composition |
| 06/02/1987 | US4670099 Method and apparatus for washing a mat of pulp stock on a drum filter |
| 05/20/1987 | EP0222674A1 Process for bleaching chemical wood pulps |
| 05/19/1987 | CA1221809A1 Process for delignification of chemical wood pulp |
| 05/12/1987 | US4664749 Method of washing cellulosic pulp submerged in washing liquid |
| 05/05/1987 | US4662993 Bleach system for dissolving chlorine gas into a bleach filtrate |
| 05/05/1987 | CA1221205A1 Procedure and apparatus for controlling the cellulose bleaching process |
| 04/29/1987 | EP0220001A1 Inhibition of deposition and adherency of adhesive materials contained in waste paper or paper products |
| 04/28/1987 | US4661205 Method of bleaching lignocellulosic material with peroxide catalyzed with a salt of a metal |
| 04/22/1987 | CN86103060A Bleaching agent made from permanganate and reducing agent |
| 04/14/1987 | US4657637 Pulp treatment apparatus having lowerable vacuum containers to facilitate removal thereof |
| 04/14/1987 | US4657633 Delignification and bleaching of a cellulose pulp with an alkalioxygen-hypochlorite single stage sequential extraction |
| 04/14/1987 | CA1220372A1 Liquid treatment of pulp |
| 04/08/1987 | EP0160069B1 Rotatable disc filter |
| 04/01/1987 | EP0215781A1 A deaeration tank and installation using the tank. |
| 03/31/1987 | CA1219733A1 Gaseous reaction apparatus and process |
| 03/31/1987 | CA1219707A1 Chlorine-based bleaching process for kraft pulps using non-alkaline or organic solvent extraction stages |
| 03/25/1987 | EP0214982A1 Method of bleaching fibre pulp for the production of paper and p aperboard |
| 03/18/1987 | EP0214279A1 Method and apparatus for detecting contamination in paper pulp |
| 03/18/1987 | CN85106402A Centrifugal filtration countercurrent pulp washer and its process |
| 03/11/1987 | EP0213252A1 A process for improving dimensional stability and biological resistance of lignocellulosic material |
| 03/10/1987 | US4648970 Easy removal of filter cakes |
| 03/04/1987 | EP0212289A1 Cross-linked pore containing microfibrillated cellulose prepared by freezing and solvent exchange |
| 03/04/1987 | EP0211945A1 Method and apparatus for alkaline delignification of lignocellulosic fibrous materials |
| 03/03/1987 | CA1218550A1 Mixer for use in pulp processes |
| 02/18/1987 | CN86202488U Apparatus for mixing middle concentration pulp with bleaching agent |
| 02/10/1987 | US4641790 System for wastepaper processing using a wash filter |
| 02/10/1987 | CA1217658A Cellulose pulp sampling and cleaning device |
| 02/04/1987 | EP0210570A1 Cross-linked microfibrillated cellulose prepared from pore generating particles |
| 01/29/1987 | WO1987000564A1 USE OF rLDMTM 1-6 AND OTHER LIGNINOLYTIC ENZYMES |
| 01/29/1987 | WO1987000450A1 Double sided mixer |
| 01/29/1987 | WO1987000448A1 Apparatus for mixing chemicals in fibre suspensions |
| 01/28/1987 | EP0209884A2 Freeze dried, cross-linked microfibrillated cellulose |
| 01/20/1987 | CA1216711A1 Manufacture of paper using copolymers of 2-acrylamido- 2-methylpropane sulfonic acid for increasing rate of dewatering of high mechanical/themomechanical pulp furnishes |