| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 10/18/2006 | EP0953544B1 Processes for preparing calcium carbonate |
| 10/12/2006 | US20060225852 Process for removing silica from cellulosic material |
| 10/11/2006 | CN1844565A Process for circulation production of wood, plate, pulp, and paper |
| 10/11/2006 | CN1844563A Paper pulp manufacturing process and equipment |
| 10/05/2006 | US20060219375 Process for producing kraft pulp |
| 10/04/2006 | CN2823307Y Pipe type falling-film evaporator |
| 10/04/2006 | CN1277986C Zero discharge technique for treating waste fluid from paper mill by using subtraction method |
| 09/27/2006 | CN1837461A Comprehensive water usage method in production of pulp |
| 09/27/2006 | CN1837459A Environment-friendly complete solution-circulating pulping process flow and method |
| 09/26/2006 | US7112256 Method for continuous cooking of chemical pulp to improve heat economy |
| 09/20/2006 | EP1702101A1 Batch process for preparing pulp |
| 09/20/2006 | CN2818533Y Alkali recovery furnace |
| 09/14/2006 | US20060201641 Methods for producing pulp and treating black liquor |
| 09/06/2006 | CN1829840A Chemimechanical desilication of nonwood plant materials |
| 09/05/2006 | US7101996 Separation of purified hemicellulose from insoluble cellulose in caustic liquor from solubilizing fiber with alkali; adding alcohol to the caustic liquor to precipitate the hemicellulose |
| 08/30/2006 | EP1694909A1 Method and plant for handling a mixture of liquor and soap, and a plant for conversion of fibre material to pulp |
| 08/29/2006 | US7097819 As a material for papermaking, as a by-product during the causticization step for recovering/regenerating the digesting agent in the kraft pulping process |
| 08/29/2006 | US7097738 cooking a fibre-based raw material in organic acids including furfural to produce a pulp; furfural obtained as a reaction product can also be utilized in the cooking; improved pulp yield |
| 08/29/2006 | CA2188262C Method for fractionating a solution |
| 08/17/2006 | WO2006085762A1 Process and apparatus for conversion of biomass |
| 08/17/2006 | CA2757539A1 Methods for beating pulp, methods for treating process waters, and methods for producing pulp and paper |
| 08/17/2006 | CA2597554A1 Process and apparatus for conversion of biomass |
| 08/16/2006 | EP1690980A1 Process and apparatus for conversion of biomass |
| 08/16/2006 | EP1171575B1 Cultivation of zygomycetes from spent sulfite liquor |
| 08/16/2006 | CN1270023C Pulp-making method of raising fiber-recovering quality |
| 08/10/2006 | US20060175029 Batch process for preparing pulp |
| 08/09/2006 | CN1268807C Method for recovering alkali and organic substance from pomace and waste liquid |
| 08/03/2006 | US20060169430 Catalytic hydrolysis of wood chips; impregnating with acid, such as nitric ,and heating; low temperature depolymerization |
| 08/01/2006 | US7084238 Brine separation in tall soap oil preparation |
| 07/26/2006 | EP1027141B1 Reactor mixing assembly and method |
| 07/26/2006 | CN1266334C Cotton pulp black liquor treating method and electrolysis apparatus thereof |
| 07/19/2006 | EP1680542A1 Methods for producing pulp and treating black liquor |
| 07/19/2006 | CN1264752C Method for producing calcium carbonate |
| 07/05/2006 | EP1676002A1 Desulphurization of odorous gases of a pulp mill |
| 07/05/2006 | EP1676001A1 Method and device for charging a fiber material suspension |
| 07/05/2006 | CN1796656A Semi-cellulose low polymer produced from fibrous farm dreges and other reyenerable Chemical substance |
| 07/05/2006 | CN1796653A Quick cleaning pulping production equipment |
| 07/04/2006 | US7069866 System for controlling the flow pattern of a recovery boiler |
| 06/28/2006 | CN1261640C Method for producing pulp by potassium containing compound as steaming preparation with cellulose containing raw material |
| 06/21/2006 | CN1260431C Alkali recovery device for straw pulp papermaking black liquor |
| 06/15/2006 | US20060127298 A slurry is created of burned lime and a first part of the soda liquor (green liquor), a second part being preheated before addition to the slurry; slaking and causticizing reactions to form caustic soda are completed under elevated temperature and pressure; for use in the kraft pulping industry |
| 06/15/2006 | US20060127287 Combinatorial preparation and testing of heterogeneous catalysts |
| 06/15/2006 | US20060124258 Smelt stand |
| 06/15/2006 | US20060124257 Method for bleaching mechanically defibered pulp |
| 06/13/2006 | CA2291722C Process for treating spent, waste, alkaline digestion liquor from paper pulping operations and product |
| 06/07/2006 | EP1664421A1 Chemimechanical desilication of nonwood plant materials |
| 06/07/2006 | EP1663873A1 Method for treating a medium with ultrasonic transducers |
| 06/01/2006 | WO2006056649A1 Method and apparatus for thickening lime mud in a disc filter |
| 05/31/2006 | EP1386111B1 Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 05/24/2006 | CN1775339A Vacuum evaporating tower |
| 05/18/2006 | US20060102300 Alkaline process for the manufacturing of pulp using alkali metaborate as buffering alkali |
| 05/04/2006 | WO2006045884A1 Cooling system for ports in a boiler |
| 05/03/2006 | CN1766227A Processing mthod of white water from paper making |
| 04/27/2006 | WO2006042901A1 Boiler arrangement |
| 04/26/2006 | CN1253631C Heat treatment of polysulphide containing white liquor |
| 04/20/2006 | WO2006040402A1 Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 04/13/2006 | WO2006038863A1 Method for separating lignin from a lignin containing liquid/slurry |
| 04/13/2006 | WO2006038072A1 Method of treating black liquor |
| 04/13/2006 | WO2006037858A1 A method and a device for preparing cellulose pulp |
| 04/13/2006 | WO2006037857A1 A method and a device for preparing cellulose pulp |
| 04/13/2006 | US20060075900 Method for the production of green liquor |
| 04/13/2006 | CA2580834A1 Method for separating lignin from a lignin containing liquid/slurry |
| 04/12/2006 | CN1757824A Practical alkali recovery furnace |
| 04/06/2006 | WO2005059242A8 Method and plant for handling a mixture of liquor and soap, and a plant for conversion of fibre material to pulp |
| 04/06/2006 | US20060070710 Method and a device for preparing cellulose pulp |
| 04/05/2006 | CN2769311Y Non-digesting biochemical solvent continuous soaking catalytic pyrolysis circulation pulping apparatus |
| 04/05/2006 | CN1755012A Comprehensive treatment method of paper-making sewage black liquor |
| 03/29/2006 | CN1752339A High-low pressure combined method for extracting black liquor |
| 03/23/2006 | WO2006031175A1 Method for separating lignin from black liquor |
| 03/23/2006 | CA2578382A1 Method for separating lignin from black liquor |
| 03/22/2006 | CN1246523C Method of heat treating black liquor |
| 03/21/2006 | US7014684 Method for the treatment of waste gas from a cellulose plant |
| 03/21/2006 | CA2246628C Method of treating malodorous gases of a pulp mill |
| 03/15/2006 | CN1245553C Water treating method in pulping industry |
| 03/14/2006 | CA2275710C Treatment of bleach plant filtrates with oxygen |
| 03/09/2006 | US20060049106 Method and arrangement in maing of mechanical pulp |
| 03/08/2006 | CN1743153A Arundo donax pulp, paper product and flakeboard |
| 02/23/2006 | WO2006019342A1 Partial oxidation of cellulose spent pulping liquor |
| 02/14/2006 | CA2370968C Gasification process for spent liquor at high temperature and high pressure |
| 02/08/2006 | CN1730813A Jet evaporating tower |
| 02/07/2006 | CA2347454C Method and apparatus for treating pulp |
| 02/07/2006 | CA2163368C Production of white liquor |
| 02/01/2006 | EP1266177B1 Arrangement for cleaning, airflow control and pushing away melt in air ports of incineration boilers |
| 01/31/2006 | CA2150243C A method of producing green liquor in chemical recovery in sulfate and sulfite pulp mills |
| 01/19/2006 | WO2005116329A9 Method and device for cleaning of filter |
| 01/12/2006 | US20060005932 Effluent or sludge containing calcium compounds from plant for deinking paper is treated with acid to dissolve form salt of calcium carbonate, calcium silicate, and calcium phosphate; separating suspended insoluble solids and combusting; heat treatment, precipitation |
| 01/11/2006 | CN1236138C Improved lime mud recovering process and its application for producing neutral glue blending paper |
| 01/11/2006 | CN1236137C Bleaching pulp |
| 01/04/2006 | EP1611281A1 Purification of alkaline washing liquid |
| 01/04/2006 | CN1715556A Method for pulping and paper-making |
| 01/03/2006 | CA2163049C Method and apparatus for controlling combustion air in a boiler plant |
| 12/29/2005 | US20050284593 Pyrolysing black liquor (at a pulp mill ) in pyrolysis reactor to separate evaporable compounds from the coke remaining in a solid state; pyrolysis products may be used as fuel; coke resulting from pyrolysis is burnt in a soda recovery boiler or in a gasification reactor to regenerate cooking chemicals |
| 12/28/2005 | CN1714194A Method and arrangement in making of mechanical pulp |
| 12/22/2005 | US20050279467 Adding a bleach to a stream of cellulosic pulp; pulp is retained at high temperature and pressure to increase bleaching activity but the pulp is cooled prior to discharge from the pressure vessel below the flash point; lower energy, nonviolent discharge |
| 12/22/2005 | CA2510090A1 Process for high temperature peroxide bleaching of pulp with cool discharge |
| 12/21/2005 | EP1115942A4 Arundo donax pulp, paper products, and particle board |
| 12/21/2005 | CN1232757C Combustion air system for recovery boilers, burning spent liquors from pulping process |
| 12/15/2005 | WO2005118950A1 Method for producing a chemical conversion pulp |
| 12/15/2005 | WO2005118113A1 Method for reducing nitrogen oxide emissions |
| 12/15/2005 | US20050274468 Central screen |