| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 11/30/1988 | EP0293350A2 Filter for concentrating suspensions |
| 11/30/1988 | EP0293309A1 Process for producing chemithermomechanical pulps |
| 11/29/1988 | US4787309 Movably supported screw press |
| 11/29/1988 | CA1245403A1 Mechanical pulp pumping and hydrosulfite bleaching |
| 11/23/1988 | EP0291846A1 Process for preparing high-concentration, pumpable hydrosulfite pastes without sediments |
| 11/15/1988 | CA1244632A1 Distributing device for suspensions |
| 11/10/1988 | DE3813371A1 Method and arrangement for the elimination of latency |
| 11/01/1988 | US4781794 Detackification of adhesive materials contained in secondary fiber |
| 10/26/1988 | EP0287626A1 Control of peroxide bleaching of different pulps. |
| 10/25/1988 | US4780181 Multizonal-washing, conditioning, cooking |
| 10/20/1988 | WO1988007988A1 Porphyrins, their syntheses and uses thereof |
| 10/19/1988 | CN88101244A Pure flax tissue paper for making fuse |
| 10/12/1988 | CN88101765A Electrochemical pulp-bleaching method |
| 10/11/1988 | US4776926 Thinning, agitation, separation into fine and long fiber fractions of varying freeness |
| 10/11/1988 | CA1242915A1 Method and equipment for the washing of cellulosic pulp |
| 10/05/1988 | EP0285530A1 Process for bleaching pulps |
| 10/05/1988 | CN87208910U Spraying, rabbling drainer |
| 09/28/1988 | EP0284344A2 Process for inhibiting aluminium hydroxide deposition in papermaking felts |
| 09/27/1988 | US4773966 Oxidative degradation of lignin with inorganic metal complexes |
| 09/22/1988 | WO1988007102A1 An improved method in gas processing |
| 09/13/1988 | US4769986 Apparatus for washing cellulose with a rotary drum |
| 09/07/1988 | EP0281273A1 Cellulosic pulp |
| 09/07/1988 | CN88100825A Continuously-producing method for cellulose pulp and/or method for removing lignin from second fibre and method of classifying fibre |
| 09/06/1988 | CA1241653A1 Polymeric quaternary ammonium compounds, their preparation and use |
| 08/31/1988 | EP0280445A1 Pitch control aid |
| 08/31/1988 | EP0280332A1 A method for stabilizing the brightness of bleached lignin containing cellulose pulp |
| 08/31/1988 | EP0280234A2 Method and apparatus for improving the treatment of fibre suspension and for the control of fibre suspension flow |
| 08/31/1988 | EP0280094A2 Filter segment for a filter for thickening a fibrous suspension |
| 08/31/1988 | EP0279845A1 Pulp bleaching process |
| 08/30/1988 | US4767848 Cross-linked microfibrillated cellulose prepared from pore generating particles |
| 08/25/1988 | WO1988006202A1 An improved peroxide bleaching method |
| 08/25/1988 | WO1988006201A1 Process for production of cellulose pulp and/or delignification of secondary fibers |
| 08/23/1988 | CA1240813A1 Absorbent vegetable material and process for making same |
| 08/17/1988 | EP0128190B1 Method of peroxide bleaching cellulose-containing material |
| 08/16/1988 | CA1240621A1 Device for a rotary filter |
| 08/09/1988 | US4762591 Apparatus for reacting lignocellulosic material with a gas phase comprising a nitrogen oxide and oxygen under controlled gas pressure |
| 08/03/1988 | EP0276608A1 Process for treating a paper slurry with ozone |
| 08/02/1988 | US4761203 Process for making expanded fiber |
| 07/27/1988 | EP0275502A1 A method for heating and cooling pulps and a heat exchanger and plant for applying the method |
| 07/27/1988 | CN87101264A Chemically degummed mothod to remove wood element for cannabis with high efficiency |
| 07/20/1988 | EP0274690A1 Method and apparatus for thickening fiber suspension |
| 07/19/1988 | US4758308 System for monitoring contaminants with a detector in a paper pulp stream |
| 07/19/1988 | CA1239255A1 Process for reducing discoloration and/or tackiness in processing waste paper fibers |
| 07/19/1988 | CA1239253A1 Method of chlorine dioxide bleaching |
| 07/14/1988 | WO1988005095A1 Method for treating a cellulose pulp with ozone |
| 07/12/1988 | US4756800 Method for producing salts of monoperoxysulfuric acid and simultaneously bleaching pulp |
| 07/12/1988 | US4756798 Process for bleaching a mechanical pulp with hydrogen peroxide |
| 07/06/1988 | EP0273759A2 Procedure for recirculating phenol in a lignocellulosic materials digestion process |
| 07/06/1988 | EP0273745A2 Process for making expanded fiber |
| 06/30/1988 | WO1988004706A1 Method for washing of alcaline pulp |
| 06/30/1988 | WO1988004705A1 Method for washing of alcaline pulp |
| 06/30/1988 | WO1988004704A1 Hydrophilic cellulose product and method of its manufacture |
| 06/21/1988 | US4752354 Process and composition for bleaching wood pulp |
| 06/21/1988 | CA1238283A1 Rotatable disc filter |
| 06/14/1988 | US4750340 Apparatus for treating a fibre suspension |
| 06/07/1988 | USH479 Agitatin suspension of pulp in aqueous medium containing hydrogen peroxide; alkenyl succinic anhydride promoter |
| 06/01/1988 | EP0269124A2 High-consistency pulp tower for discharging said pulp |
| 05/31/1988 | US4748076 Water absorbent fibrous product and a method of producing the same |
| 05/24/1988 | US4746405 System for cellulose pulp washing control |
| 05/24/1988 | CA1237008A1 Pulp thickening utilizing stationary screens |
| 05/18/1988 | EP0267190A1 Apparatus for mixing chemicals in fibre suspensions. |
| 05/18/1988 | CN87107484A Size treatment technology and apparatus for fuzz fibres |
| 05/17/1988 | US4744722 Method and apparatus for the mixing of liquid or gas into pulp stock |
| 05/05/1988 | WO1988003190A1 Process for producing cellulose from lignin-containing raw materials |
| 05/05/1988 | DE3636208A1 Verfahren zur delignifizierung und bleichung von lignicellulosehaltigem bzw. ligninhaltigem material bzw. lignin durch enzymatische behandlung Process for the delignification and bleaching of lignocellulosic material or lignicellulosehaltigem or lignin by enzymatic treatment |
| 05/03/1988 | CA1235881A1 Stabilization of peroxide systems in the presence of alkaline earth metal ions |
| 04/27/1988 | EP0139633B1 Reactor to perform chemical reactions with dimensional reduction of solid materials |
| 04/26/1988 | US4740212 Chlorine dioxide and nitrogen compound; brightness |
| 04/26/1988 | CA1235602A1 Method and apparatus for controlling the consistency of a pulp suspension |
| 04/21/1988 | WO1988002796A1 Control of peroxide bleaching of different pulpes |
| 04/12/1988 | US4737277 For pulp slurries |
| 04/06/1988 | EP0263040A1 Process for bleaching lignocellulosic materials |
| 04/06/1988 | EP0262836A1 Improved process for the bleaching of cellulosic pulps using hydrogen peroxide |
| 04/06/1988 | EP0262553A2 Process for treating cellulosic raw materials |
| 04/05/1988 | US4735684 Rate, consistency uniformity |
| 04/05/1988 | CA1234655A1 Method of peroxide bleaching cellulose-containing material |
| 03/30/1988 | EP0262040A1 Process for treating a paper pulp with an enzymatic solution |
| 03/29/1988 | US4734161 Hydrogen peroxide, sequestering agent |
| 03/29/1988 | US4734160 Method of two-stage peroxide bleaching of mechanical or semi-mechanical pulp |
| 03/24/1988 | WO1988002046A1 Material processing system |
| 03/24/1988 | WO1988002045A1 Material processing system |
| 03/24/1988 | WO1988002044A1 Material processing system |
| 03/23/1988 | EP0261025A1 Process and apparatus for treating printed waste paper |
| 03/22/1988 | US4732651 Countercurrent flow, wood pulp |
| 03/22/1988 | US4732650 Pretreatment with chelate compounds |
| 03/22/1988 | EP0215781A4 A deaeration tank and installation using the tank. |
| 03/16/1988 | EP0260183A1 Composite material based on a matrix of a thermosetting resin reinforced with discontinuous cellulosic fibres, and production method |
| 03/15/1988 | US4731161 Semibleaching liquor for Kraft paper products |
| 03/15/1988 | US4731160 Drainage characteristics of mechanical pulp |
| 03/10/1988 | WO1988001661A1 Pulp bleaching process |
| 03/08/1988 | US4729886 Gelation inhibition |
| 03/08/1988 | US4729817 Process for the oxidative delignification of demethylated chemical pulp |
| 03/02/1988 | EP0258196A1 A process for the preparation of sulphide-free alkali liquor |
| 02/24/1988 | CN85105596B Vertical washing machine |
| 02/16/1988 | CA1232785A1 Apparatus for treating lignocellulosic material with a gas phase |
| 02/09/1988 | US4724045 Pulp decolor process |
| 02/02/1988 | US4722793 Pair of rolls with wire loop traveling around both |
| 01/19/1988 | US4720383 Softening and conditioning fibers with imidazolinium compounds |
| 01/19/1988 | US4719772 Apparatus for removing ink particles from paper products |
| 01/13/1988 | EP0252649A2 Process for making individualized, cross-linked fibres |