| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 01/22/1980 | CA1070058A1 Process for washing cellulose pulp from alkali digestion |
| 01/22/1980 | CA1070056A1 Process for oxygen alkali delignification of wood pulp |
| 01/15/1980 | US4183146 Sulfonation, papermaking |
| 01/15/1980 | CA1069742A1 Pulp sheet formation |
| 01/08/1980 | CA1069363A1 Three vessel treatment system |
| 12/18/1979 | CA1068054A1 Method for controlling the addition of active chemical for delignifying and/or bleaching cellulose pulp suspended in a liquor containing chemicals reactive with the delignifying and/or bleaching chemical |
| 12/04/1979 | US4177105 Apparatus for delignifying and bleaching cellulose pulp |
| 11/01/1979 | WO1979000861A1 A method of refining cellulose pulps |
| 10/30/1979 | CA1065105A1 Method for bleaching of material containing cellulose |
| 10/23/1979 | US4172037 Continuous process diffuser |
| 10/16/1979 | CA1064296A1 Continuous process diffuser |
| 10/02/1979 | CA1063409A1 Oxygen bleaching |
| 10/02/1979 | CA1063408A1 Two-stage pulp thickening |
| 09/25/1979 | CA1063276A1 Nitrogenous condensation products |
| 09/25/1979 | CA1062858A1 Oxygen bleaching of pulp in presence of high-silica protector |
| 09/06/1979 | WO1979000637A1 Bleaching lignocellulose material with bleaching agents containing peroxide |
| 09/04/1979 | CA1061509A1 Stabilized sodium hydrosulfite composition and process for bleaching wood pulp therewith |
| 08/07/1979 | CA1059809A1 Web-dryer threading apparatus having anti-centrifugal structure |
| 07/24/1979 | US4162215 Displacement of a liquid A by a liquid B in a suspension |
| 07/17/1979 | US4161421 Method and apparatus for continuous oxygen bleaching of cellulosic pulp |
| 07/10/1979 | US4160693 Process for the bleaching of cellulose pulp |
| 07/10/1979 | CA1057906A1 Method for automatic control of the dosageing of two chemicals |
| 07/03/1979 | CA1057671A1 Apparatus for processing liquid-containing substance mixtures, particularly cellulose pulp |
| 06/26/1979 | CA1057010A1 Process and apparatus for flash drying cellulose pulp |
| 06/19/1979 | US4158597 Cellulose pulp |
| 06/19/1979 | CA1056558A1 Strenghtening of mechanical pulp by chemical treatment |
| 06/14/1979 | WO1979000309A1 Dual belt pulp washer |
| 06/05/1979 | US4157302 Method and apparatus for treating liquid-containing substance mixtures, particularly fibre suspensions |
| 06/05/1979 | CA1055656A1 Bleach hydrolysis of cellulose with substantially reduced use of chlorine |
| 05/29/1979 | CA1055291A1 Method of treating ligno-cellulose containing material |
| 05/22/1979 | US4155806 Method for continuous alkaline delignification of lignocellulose material in two or more steps, the final of which with oxygen |
| 05/15/1979 | US4154644 Pulp washer |
| 05/15/1979 | CA1054417A1 Method and apparatus for processing finely divided bulk material with gas without overpressure |
| 05/08/1979 | CA1053860A2 Chlorine dioxide generation and pulp bleaching |
| 05/01/1979 | CA1053604A1 Production of chlorine dioxide and integration with effluent-free pulp mill |
| 04/24/1979 | US4151093 Papermaking |
| 04/24/1979 | CA1052955A1 Multi-stage chlorinator |
| 04/10/1979 | CA1052156A1 Pulp |
| 03/27/1979 | CA1051244A1 Method of treating a continuous web of wood or cellulose pulp and apparatus for carrying out the method |
| 03/13/1979 | CA1050477A1 Electrolytic production of alkaline peroxide solutions |
| 03/13/1979 | CA1050317A1 Method and apparatus for treating fibrous material |
| 03/06/1979 | CA1049711A1 Chlorine dioxide generation |
| 02/27/1979 | US4141786 Redox system |
| 02/27/1979 | CA1049310A1 Flow control method and apparatus for continuous wood chip digester "screenless" liquor extractor |
| 02/13/1979 | US4139467 Disc press for continuous pressing of aqueous or suspended pulp |
| 02/13/1979 | US4139411 System for forming and treating a narrow multi-layer web |
| 02/13/1979 | CA1048324A1 Process for producing convoluted, fiberized, cellulose fibers and sheet products therefrom |
| 02/06/1979 | US4138313 Method and apparatus for continuously washing fibrous suspensions and controlling the volume of wash liquid |
| 01/30/1979 | CA1047209A1 Method and apparatus for treating cellulosic pulp with oxygen in alkali conditions and at raised pressure and temperature |
| 01/23/1979 | US4136028 Method for filtering a fibrous material by means of a disc filter as well as a disc filter for performing the method |
| 01/09/1979 | US4133714 Reaction vessel with pulsating means for producing lignocellulose product from crushed vegetable raw materials |
| 01/09/1979 | CA1045759A1 Bleaching of lignocellulosic material with nitrogen oxides |
| 01/02/1979 | US4132589 Delignification and bleaching of cellulose pulp |
| 01/02/1979 | CA1045435A1 Process for continuously washing aqueous fibrous suspensions |
| 12/26/1978 | CA1044933A1 Process for controlling the supply of liquid in continuously washing suspensions |
| 12/26/1978 | CA1044857A1 Method of liquid-treating a running fibre web and a device for carrying out the method |
| 12/05/1978 | US4128692 Superabsorbent cellulosic fibers having a coating of a water insoluble, water absorbent polymer and method of making the same |
| 12/05/1978 | US4128454 With chlorine dioxide gas |
| 12/05/1978 | CA1043516A1 Method for producing oxidized white liquor |
| 12/05/1978 | CA1043514A1 Oxygen bleaching in the presence of a catalyst |
| 11/28/1978 | US4127233 Apparatus and method for dispersing a liquid treating agent |
| 11/28/1978 | CA1043147A1 Method and device for distribution and mixing-in of gas and/or liquid in pulp suspensions of high concentration |
| 11/21/1978 | CA1042612A1 Process for delignification and bleaching of cellulose pulp |
| 10/31/1978 | US4123363 Disk filter |
| 10/31/1978 | US4123318 Impregnation, digestion, washing cellulsoe fiber |
| 10/31/1978 | US4123317 Method and an apparatus for processing finely divided fibrous pulp with gas without overpressure |
| 10/24/1978 | US4121968 Secondary vacuum box for a rotary vacuum filter |
| 10/24/1978 | CA1040809A1 Process of delignification and bleaching lignocellulose pulp |
| 10/10/1978 | US4119486 Process for bleaching wood pulp with ozone in the presence of a cationic surfactant |
| 10/10/1978 | CA1039908A1 Process for the delignification of lignocellulosic material |
| 10/03/1978 | US4118305 Apparatus for electrochemical reactions |
| 09/26/1978 | US4116759 Preparation of liquor for delignification or alkali treatment by autocaustization, and the preparation of pulp with this liquor |
| 09/19/1978 | US4115186 In alkaline medium |
| 09/12/1978 | US4113936 Cross-linking of cellulose fibers in gas suspension |
| 09/12/1978 | US4112587 Method and means for drying a fibre material containing cellulose |
| 09/12/1978 | CA1038108A1 Treatment with gas, especially oxygen gas |
| 08/29/1978 | CA1037228A1 Gaseous reaction apparatus and processes |
| 08/22/1978 | US4108960 Stabilized with vanillin, ethyl vanillin, and benzoin |
| 08/22/1978 | CA1036759A1 Method for the oxygen-gas delignification of lignocellulosic material and apparatus for carrying out the method |
| 08/22/1978 | CA1036758A1 Method of delignification of cellulosic material in alkaline medium using oxygen |
| 08/22/1978 | CA1036757A1 Process for delignifying and bleaching cellulose pulp |
| 08/15/1978 | US4106980 Thickener apparatus including a shaftless cylinder mold |
| 08/08/1978 | US4105494 Continuous; dilution rate |
| 08/01/1978 | US4104114 Bleach plant operation |
| 07/11/1978 | US4100069 Two-stage pulp thickening |
| 06/20/1978 | US4096029 Halogenation, extraction, oxidation, bleaching |
| 06/20/1978 | US4096028 Feed forward control of dissolved solids in a countercurrent separation and washing zone |
| 06/06/1978 | US4093511 Apparatus for oxygen bleaching of pulp including recirculation of exhaust gases |
| 06/06/1978 | US4093509 Production of pulp slurries employing isatoic anhydride |
| 06/06/1978 | US4093507 Multicycle compression with rotating paddle wheel |
| 06/06/1978 | US4093506 Method and apparatus for effecting even distribution and mixing of high consistency pulp and treatment fluid |
| 05/16/1978 | US4089737 Delignification of cellulosic material with an alkaline aqueous medium containing oxygen dissolved therein |
| 05/02/1978 | US4087318 Oxygen-alkali delignification of lignocellulosic material in the presence of a manganese compound |
| 04/18/1978 | US4085003 Pressure pulp washer with pivoted baffle |
| 04/18/1978 | US4085002 Cellulose |
| 03/28/1978 | US4081317 Process for the reduction of effluent color from a cellulosic pulp bleaching sequence |
| 03/28/1978 | US4081316 Method for producing fluffed pulp |
| 03/21/1978 | US4080249 Delignification and bleaching of a lignocellulosic pulp slurry with ozone |
| 03/21/1978 | US4079877 Web-dryer threading apparatus having anti-centrifugal structure |
| 02/28/1978 | US4076623 Continuous oscillation of liquid separator |