| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 11/02/1995 | WO1995029002A1 Method for fractionating a solution |
| 10/26/1995 | WO1995028518A1 Recovering chemical values from black liquor |
| 10/25/1995 | EP0678130A1 Method for reburning of lime sludge in fluidised bed |
| 10/24/1995 | CA1337386C Process and preservative for fodder preservation |
| 10/11/1995 | EP0675981A1 Chlorine dioxide generation for a zero discharge pulp mill |
| 10/11/1995 | CN1030003C Process for preparation of cooking liquors having high sulphidity for sulphate pulp cooking |
| 10/05/1995 | WO1995026439A1 Smelt spout for a recovery furnace |
| 10/03/1995 | US5455328 Method for acidification of soap with sodium bisulphite solution |
| 10/03/1995 | US5454908 Recovery boiler and method of reducing NOx emissions |
| 09/28/1995 | WO1995025845A1 Process for combusting sulphite liquor containing magnesium or ammonium, and a boiler for combusting sulphite liquor in accordance with the process |
| 09/26/1995 | CA2119963A1 Smelt spout for a recovery furnace |
| 09/21/1995 | WO1995025198A1 Clarifying and/or filtering of green liquor and an apparatus therefore |
| 09/21/1995 | WO1995025197A1 Regeneration of pulp liquors |
| 09/21/1995 | CA2185224A1 Regeneration of pulp liquors |
| 09/20/1995 | EP0672211A1 A method of producing green liquor in chemical recovery in sulfate and sulfite pulp mills. |
| 09/20/1995 | EP0672210A1 Method for controlling an ozone bleaching process |
| 09/20/1995 | EP0672208A1 Method of bleaching pulp without using chlorine-containing chemicals |
| 09/20/1995 | CN1108714A Oxidized white liquor production method |
| 09/19/1995 | US5450892 Alkaline scrubber for condensate stripper off-gases |
| 09/19/1995 | US5450803 Method for the combustion of waste liquids |
| 09/13/1995 | CN2207399Y Combined dewatering filtering machine for paper-making black mixed coagulative liquid |
| 09/13/1995 | CN1108328A Causticization at normal temp. for alkali recovered from black liquor of paper-making |
| 09/08/1995 | WO1995023891A1 Impact of temperature and alkali charge on pulp brightness |
| 09/06/1995 | EP0670001A1 Method and apparatus for improving the safety of a spent liquor recovery boiler. |
| 09/06/1995 | EP0670000A1 Method for acidification of soap with sodium bisulphite solution |
| 08/31/1995 | WO1995023256A1 Process for generation and use of additional pulping chemicals in kraft-type process |
| 08/31/1995 | DE19506563A1 Fluidised bed gasification reactor |
| 08/30/1995 | EP0668983A1 System and device for supplying oxygen-containing gas into a furnace |
| 08/17/1995 | WO1995021960A1 Process and device for digesting cellulose material in a carboxylic acid mixture |
| 08/16/1995 | EP0666831A1 Process associated with the gasification of cellulose spent liquors |
| 08/15/1995 | US5441602 Process for the prevention of scale formation in wood pulp production |
| 08/10/1995 | WO1995021291A1 Process for separating off chloride from sulphide-containing alkaline liquor |
| 08/10/1995 | CA2181584A1 Process for separating off chloride from sulphide-containing alkaline liquor |
| 08/09/1995 | EP0665911A1 Completely countercurrent cook continuous digester |
| 08/08/1995 | US5439557 Method of recovering energy and chemicals from a spent liquor using low frequency sound in a recovery boiler |
| 08/08/1995 | US5439556 Oxidation of white liquor using a packing column |
| 08/08/1995 | US5439555 Minimum adverse environmental pulp with feed to chlorate manufacture |
| 08/01/1995 | US5437768 Non-baffled low pressure drop vacuum cooled inserted smelt spout |
| 07/26/1995 | EP0663971A1 Process for dividing the sulphide content of the green liquor for the production of white liquors having high and low sulphidity respectively |
| 07/26/1995 | EP0663890A1 A process for recovering alkali metal hydroxide from organic liquors |
| 07/19/1995 | EP0662860A1 A process for pelletising particles of alkali metal ferrite |
| 07/13/1995 | WO1995018884A1 Process for the recovery of chemicals and energy from pulp bleaching effluent |
| 07/11/1995 | US5431820 Method for treating liquid waste after pulp bleaching |
| 07/06/1995 | WO1995018263A1 Economizer of a recovery boiler |
| 07/06/1995 | WO1995018262A1 Recovery boiler for combustion of waste liquors |
| 07/06/1995 | CA2180244A1 Economizer of a recovery boiler |
| 07/05/1995 | EP0660897A1 Method for the combustion of waste liquids. |
| 07/05/1995 | EP0660896A1 Method for recovery of chemicals and energy from spent liquor |
| 06/29/1995 | WO1995017547A1 Process for extracting pure, coarse grain silicic acid crystals |
| 06/29/1995 | CA2179730A1 Process for extracting pure, coarse grain silicic acid crystals |
| 06/20/1995 | US5425850 Circulating fluidized bed for combusting black liquor to produce dry recoverable salts and low calorific gas |
| 06/20/1995 | CA1335976C Recovery of naoh and other values from spent liquors and bleach plant effluents |
| 06/18/1995 | CA2135694A1 Water soluble graft copolymers for laser print deinking loop and recycled fiber water clarification |
| 06/14/1995 | EP0656966A1 Method of treating process water. |
| 06/14/1995 | EP0656871A1 Aqueous suspensions of colloidal particles, preparation and use of the suspensions. |
| 06/07/1995 | EP0656083A1 Reduction of chloride in pulping chemical recovery systems. |
| 06/07/1995 | CN1103450A Straw pulp black liquor silicon removing method |
| 06/01/1995 | WO1995014811A1 Process for integrated evaporation and gasification of spent liquor from cellulose cooking |
| 05/30/1995 | US5419812 Method for regulating sulfur dioxide emissions from a recovery furnace |
| 05/24/1995 | EP0654558A1 Method of separating sodium hydroxide from white liquor |
| 05/19/1995 | EP0663890A4 A process for recovering alkali metal hydroxide from organic liquors. |
| 05/19/1995 | EP0662860A4 A process for pelletising particles of alkali metal ferrite. |
| 05/18/1995 | WO1995013419A1 Implementation of dissolved solids profiling |
| 05/17/1995 | EP0653511A1 Process for purification and recycle of solutions |
| 05/17/1995 | EP0652991A1 Zero discharge pulp mill. |
| 05/16/1995 | US5415751 Method of producing acids and alkalis |
| 05/03/1995 | CN1102227A Fully recovery of paper-mill black liquor and development as resource |
| 05/03/1995 | CN1102226A Recovery technology for straw pulp black liquor waste soda lye |
| 04/27/1995 | WO1995011335A1 A method for burning secondary sludge in a recovery boiler |
| 04/26/1995 | EP0649939A1 Method of producing sodium hydroxide from white liquor |
| 04/26/1995 | CN1101955A Method for synchronously separating alkali and lignin from paper-making black liquor |
| 04/26/1995 | CN1101954A Flocculant for treating paper-making black liquor |
| 04/20/1995 | WO1995010486A1 Method and apparatus for treating paper mill effluent |
| 04/20/1995 | DE4190919C2 Device for determining entrained particles in the interior of a furnace |
| 04/19/1995 | EP0532625B1 Process for the preparation of an aqueous solution of sodium compounds |
| 04/18/1995 | US5407583 Adding a mixture of polyacrylic acid, polymethacrylic acid, polymaleic anhydride, or copolymers thereof or copolymers with acrylamide, and polydimethyldiallylammonium chloride |
| 04/18/1995 | US5407455 Having lining arranged at distance from cladding, creating radial gap for overpressure gas or air which enters reactor hearth through lining joints, preventing combustion materials from entering gap |
| 04/13/1995 | WO1995009944A1 DESCALING BY REGULATING pH AND SALT CONCENTRATION |
| 04/13/1995 | CA2173215A1 Descaling by regulating ph and salt concentration |
| 04/11/1995 | US5405502 Apparatus for treating black liquor |
| 04/11/1995 | US5405497 Gas is introduced through a porous surface of revolution producing bubbles |
| 04/11/1995 | US5405496 Process for the preparation of cooking liquors having high sulphidity for sulphate pulp cooking |
| 04/06/1995 | WO1995009269A1 Preparation of cooking liquor containing sulphite |
| 04/05/1995 | EP0646198A1 Circulating fluidized bed black liquor gasification process and apparatus. |
| 04/05/1995 | CN1101089A A process for pelletising particles of alkali metal ferrite |
| 04/04/1995 | US5403442 Pumping with deaerating centrifugal pump controls foaming on heat exchanging evaporator surfaces |
| 04/04/1995 | US5403441 Minimal variation in pressure and oxygen concentration at ozone generator provided by five interacting feedback loops; high speed adjustment |
| 03/28/1995 | US5401362 Control of metals and dissolved organics in the bleach plant |
| 03/28/1995 | US5401361 Completely coutercurrent cook continuous digester |
| 03/23/1995 | WO1995008022A1 Continuous process and apparatus for the exploitation of energy contained in cellulose production process wastes |
| 03/23/1995 | WO1995007750A1 Method and apparatus for absorbing hydrogen sulphide |
| 03/23/1995 | CA2171342A1 Method and apparatus for absorbing hydrogen sulphide |
| 03/22/1995 | CN1027984C Method for recoverying & reusing papermaking waste water |
| 03/15/1995 | EP0643163A2 Oxidised white liquor production method |
| 03/15/1995 | EP0642612A1 A process for recovering chemicals and energy from cellulose waste liquor |
| 03/15/1995 | EP0642611A1 A process for recovering energy from a combustible gas |
| 03/15/1995 | EP0642610A1 Treatment of bleach plant effluents |
| 03/09/1995 | WO1995006775A1 Minimum adverse environmental impact pulp mill |
| 03/09/1995 | WO1995006774A1 Minimum adverse environmental pulp mill with feed to chlorate manufacture |
| 03/09/1995 | WO1995006772A1 Improved method for bleaching lignocellulosic pulp |