| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 03/09/1995 | CA2170612A1 Minimum adverse environmental pulp mill with feed to chlorate manufacture |
| 03/09/1995 | CA2170594A1 Minimum adverse environmental impact pulp mill |
| 03/09/1995 | CA2170398A1 Improved method for bleaching lignocellulosic pulp |
| 03/08/1995 | EP0641884A1 Improved chemical recovery from kraft black liquor |
| 03/02/1995 | WO1995006226A1 Device for manoeuvring an air-control mechanism in a furnace |
| 03/02/1995 | WO1995006011A1 Method of incinerating sludge resulting from waste-water treatment |
| 03/02/1995 | CA2168220A1 Device for manoeuvring an air-control mechanism in a furnace |
| 03/01/1995 | CN1099444A Dissolved solids control in pulp production |
| 02/22/1995 | EP0639163A1 Turbo oxidation system (tos) for "wet combustion" of cod-containing liquids and for cod-reduction by enzymes. |
| 02/22/1995 | EP0639158A1 Method for purifying process water or wastewater containing wood resin. |
| 02/22/1995 | EP0639097A1 Distillation apparatus. |
| 02/22/1995 | EP0639096A1 Distillation apparatus. |
| 02/22/1995 | CN1027708C Multifunction alkaline recovering smoke and waste steam boiler |
| 02/09/1995 | WO1995004188A1 A method of integrating bleaching and recovery in the production of pulp |
| 02/02/1995 | WO1995003449A1 Method for adjusting the chlorine equilibrium in a sulphate cellulose process |
| 02/02/1995 | CA2167820A1 Method for adjusting the chlorine equilibrium in a sulphate cellulose process |
| 02/01/1995 | CN1098070A Method for treating paperworking waste water with photosynthetic bacteria |
| 01/17/1995 | US5382322 In Kraft pulp mills |
| 01/17/1995 | US5382321 Process for the concentration of spent liquors |
| 01/17/1995 | CA2078958C Treatment of melt in a recovery boiler |
| 01/17/1995 | CA2034249C Process and reactor for recovering energy and chemicals from spent liquor |
| 01/10/1995 | US5380402 Reducing pulp mill liquid discharge |
| 01/10/1995 | CA1333840C Apparatus and method of treating black liquor |
| 01/05/1995 | WO1995000701A1 Production of polysulphide by electrolysis of white liquor containing sulphide |
| 01/05/1995 | WO1995000698A1 Hemicellulose recovery during kraft pulping |
| 01/03/1995 | US5378319 Lime mud calcining using dielectric hysteresis heating |
| 12/28/1994 | CN1096834A Method for removing organic pollution materials from waste water of papermaking |
| 12/22/1994 | WO1994029518A1 Combustion of black liquor and processing of lime sludge in a recovery boiler |
| 12/22/1994 | WO1994029517A1 Reactor for gasification of cellulose-waste liquors especially black liquor |
| 12/22/1994 | WO1994029516A1 Production of white liquor |
| 12/20/1994 | US5374333 Air and water pollution control |
| 12/14/1994 | EP0523105B1 Method and apparatus for generating heat and electricity in a sulphate pulp mill |
| 12/07/1994 | EP0533733B1 Process for the partial combustion of cellulose spent liquor ii |
| 12/06/1994 | US5370772 Pressurized gasification of black liquor |
| 12/06/1994 | US5370771 Oxidizing a atomized waste from pulf production with limited oxygen and a generated low frequency sound waves |
| 11/29/1994 | US5368471 Method and apparatus for use in monitoring and controlling a black liquor recovery furnace |
| 11/24/1994 | WO1994026380A1 Method for fractionating sulphite cooking liquor |
| 11/22/1994 | US5366716 Method for recovering sulphur dioxide from the chemical circulation of a sulphate pulp mill |
| 11/10/1994 | WO1994025668A1 Dissolved solids control in pulp production |
| 11/10/1994 | CA2424682A1 Dissolved solids control in pulp production |
| 11/09/1994 | EP0623046A1 Separation device and process. |
| 11/08/1994 | CA2123016A1 Lime production method |
| 11/08/1994 | CA1332862C Kraft pulping process |
| 11/01/1994 | US5360514 Treatment of bleach plant filtrations using a magnesium filter |
| 11/01/1994 | US5360513 Sulphur removal from gases associated with boilers having cascade evaporators |
| 10/26/1994 | CN1094106A Agglutinant for recovering alkali in paper making industry and its preparation |
| 10/18/1994 | CA1332526C Process for the continuous digestion of cellulosic fiber material |
| 10/13/1994 | WO1994023124A1 Process for converting sodium sulphate |
| 10/13/1994 | WO1994023123A1 Method for reusing spent gas from an ozone bleaching reactor |
| 10/13/1994 | WO1994023122A1 Method of treating process water |
| 10/13/1994 | CA2160123A1 Method of treating process water |
| 10/13/1994 | CA2159444A1 Method for reusing spent gas from an ozone bleaching reactor |
| 10/12/1994 | EP0618846A1 Separating arrangement and method for counteracting foam formation. |
| 10/11/1994 | US5354479 Adding high molecular weight polyethylene oxide and cellulose ether to process water to flocculate the resin |
| 10/05/1994 | EP0617747A1 A method of preparing digesting liquor. |
| 10/05/1994 | EP0502052B1 A process for the preparation of cooking liquors having high sulphidity for sulphate pulp cooking |
| 10/04/1994 | US5352333 Process for the partial combustion of cellulose spent liquor using twin-fluid nozzle burner |
| 10/04/1994 | US5352332 Process for recycling bleach plant filtrate |
| 09/29/1994 | WO1994021857A1 Treatment of bleach plant effluents |
| 09/29/1994 | CA2134882A1 Treatment of bleach plant effluents |
| 09/21/1994 | CN2177742Y Device for treating black liquor of making paper |
| 09/21/1994 | CN1025965C Comprehensive processing for extracting humic acid from paper making black liquid |
| 09/20/1994 | CA1332023C Process for cooking and bleaching pulp |
| 09/15/1994 | WO1994020677A1 A method of separating sulphur compounds |
| 09/15/1994 | WO1994020676A1 Process for purifying the combustion gases of a recovery boiler |
| 09/15/1994 | WO1994020675A1 Zero discharge mill distillation, salt recovery, and water management |
| 09/15/1994 | WO1994020419A1 Process and installation for preparating cellulose waste lye |
| 09/15/1994 | CA2155439A1 Zero discharge mill distillation, salt recovery, and water management |
| 09/14/1994 | EP0614500A1 Method of recovering energy from waste liquors from pulp processes. |
| 09/13/1994 | US5346591 Apparatus for treatment of chips with heated black liquor |
| 09/01/1994 | WO1994019091A1 Process and apparatus for absorbing hydrogen sulphide |
| 08/31/1994 | EP0612397A1 A heat exchanger |
| 08/24/1994 | CN1025729C Mixing-ultra filtering method treating system for cotton size black fluid |
| 08/23/1994 | US5340440 Method for recovering chemicals using recovery boiler having at least 2 different melt sections |
| 08/18/1994 | DE4304143A1 Process for purifying waste air, in particular from cellulose staple fibre works, by recovery of CS2 and H2S |
| 08/04/1994 | WO1994017240A1 Method for the recovery of cellulose spent liquors |
| 08/04/1994 | CA2153983A1 Method for the recovery of cellulose spent liquors |
| 08/03/1994 | CN1090357A A process for pelletising particles of alkali metal ferrite |
| 08/03/1994 | CN1090356A Closed ciculation method for water used in producing paper by regenerated pulp |
| 08/03/1994 | CN1090256A A process for recovering alkali metal hydroxide from organic liquors |
| 07/21/1994 | WO1994016140A1 Method for reburning of lime sludge in fluidised bed and arrangement for performance of the method |
| 07/21/1994 | CA2153569A1 Method for reburning of lime sludge in fluidised bed and arrangement for performance of the method |
| 07/20/1994 | CN1089675A Aqueous suspensions of colloidal particles, preparation and use of the suspensions |
| 07/20/1994 | CN1089578A Method of treating process water |
| 07/13/1994 | EP0605565A1 A method in ozone bleaching of pulp. |
| 07/12/1994 | US5328563 Method of treating material containing sodium sulphate and/or sodium carbonate in a pulp mill |
| 07/07/1994 | WO1994015020A1 Chlorine dioxide generation for a zero discharge pulp mill |
| 07/07/1994 | CA2151172A1 Chlorine dioxide generation for a zero discharge pulp mill |
| 07/05/1994 | US5326433 Multi-level sulfide content white liquor production and utilization in cellulose pulping |
| 06/28/1994 | CA2059264C Multistage evaporating system |
| 06/14/1994 | US5320757 Method of inhibiting calcium oxalate scale deposition |
| 06/09/1994 | WO1994012829A1 System and device for supplying oxygen-containing gas into a furnace |
| 06/09/1994 | WO1994012723A1 A method of producing green liquor in chemical recovery in sulfate and sulfite pulp mills |
| 06/09/1994 | WO1994012720A1 Method of bleaching pulp without using chlorine-containing chemicals |
| 06/08/1994 | EP0599917A1 Production of alkali metal hydroxide and regeneration of pulp liquors |
| 06/01/1994 | CN2167118Y Alkali lye recovery equipment from pulping black liquor |
| 06/01/1994 | CN2167117Y Separation and extraction equipment for pulping black liquor |
| 05/26/1994 | WO1994011571A1 Method for acidification of soap with sodium bisulphite solution |
| 05/26/1994 | WO1994011570A1 Method for controlling an ozone bleaching process |
| 05/26/1994 | CA2148614A1 Method for controlling an ozone bleaching process |