| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 09/30/2009 | CN101545226A Method for improving bagasse alkaline cooking effect through wet process with CEH bleaching waste liquor |
| 09/29/2009 | CA2371208C Process and feeding system |
| 09/23/2009 | CN101538815A Scale inhibitor in green liquor manufacturing system, inhibiting method and green liquor manufacturing system |
| 09/22/2009 | US7591988 Method for processing flue gases |
| 09/16/2009 | CN101535565A A method and equipment for the evaporation of black liquor that is obtained from a digestion process during the production of cellulose pulp |
| 09/15/2009 | US7587994 Arrangement in recovery boiler |
| 09/15/2009 | CA2365410C Apparatus for gasification of spent liquor |
| 09/15/2009 | CA2297106C Method for producing polysulfides by electrolytic oxidation |
| 09/11/2009 | WO2009109677A1 Cellulose recovery method and use thereof in the production of livestock bedding |
| 09/03/2009 | WO2009108601A2 Process for generating a hydrocarbon feedstock from lignin |
| 09/03/2009 | WO2009108599A2 Process for generating a hydrocarbon feedstock from lignin |
| 09/03/2009 | CA2716026A1 Process for generating a hydrocarbon feedstock from lignin |
| 09/03/2009 | CA2716006A1 Process for generating a hydrocarbon feedstock from lignin |
| 09/02/2009 | EP2094768A1 Method for recovering a low sodium content lignin fuel from black liquor |
| 09/02/2009 | CN101519853A Method for processing alkaline pulping black liquor in paper making process |
| 09/01/2009 | CA2301371C Process for bleaching lignocellulose pulp |
| 08/27/2009 | WO2009104995A1 A method for separating lignin from black liquor, a lignin product, and use of a lignin product for the production of fuels or materials |
| 08/26/2009 | CN100532332C Formula and preparation process of plant nutrition liquid prepared by using plant fiber biological pulping recovery liquid |
| 08/19/2009 | EP2089571A1 A method to use heat energy from black liquor |
| 08/19/2009 | CN100528383C Plate-type down-film evaporator descaling method |
| 08/18/2009 | US7575657 waste waters treatment produced in connection with papermaking, by dehydration and mixing with solid fuel such as peat, bark, wood chips, sawdust, then burning in a power boiler; heat transfer; cost efficiency |
| 08/12/2009 | CN101506340A Production of a refinery feedstock from soaps produced during a chemical pulping process |
| 08/12/2009 | CN101503866A Solvent recovery method in cellulosic fiber preparation with ionic liquid as solvent |
| 08/11/2009 | CA2488062C System for producing energy at a pulp mill |
| 08/04/2009 | US7569200 Method for reducing nitrogen oxide emissions |
| 08/04/2009 | CA2392908C Method for improved turpentine recovery from modern cooking plants |
| 08/04/2009 | CA2384471C Oxidised white liquor in an oxygen delignification process |
| 07/22/2009 | EP2079873A1 A method and equipment for the evaporation of black liquor that is obtained from a digestion process during the production of cellulose pulp |
| 07/22/2009 | CN101487197A Straw pulp black liquor concentration process |
| 07/22/2009 | CN101487196A Ammonium lignosulphonate production method |
| 07/21/2009 | CA2374913C Method for recovering chemicals in a process of producing kraft pulp |
| 07/15/2009 | CN101484633A Apparatus for cleaning a smelt spout of a combustion device |
| 07/09/2009 | WO2009028969A9 Lignin and other products isolated from plant material, and methods and compositions therefor |
| 07/08/2009 | CN101476257A Method for extracting lignose from papermaking black liquor |
| 07/08/2009 | CN100510247C Black liquor recovery agent for pulp making process |
| 07/02/2009 | WO2009082338A1 Method for kraft pulp production where hemicelluloses are returned |
| 07/02/2009 | WO2009079746A1 Use of chemical pulp mill steam stripper off gases condensate as reducing agent in chlorine dioxide production |
| 07/02/2009 | CA2707024A1 Use of chemical pulp mill steam stripper off gases condensate as reducing agent in chlorine dioxide production |
| 06/30/2009 | US7553394 Method for removing potassium from ash produced in a kraft pulping process recovery boiler using a Na-type cation exchange organic resin |
| 06/24/2009 | EP2071926A2 Process and system for producing commercial quality carbon dioxide from high solids lime mud |
| 06/24/2009 | CN100503967C Comprehensive water usage method in production of pulp |
| 06/23/2009 | US7550177 in white liquor in pulp and paper processes can be advantageously achieved to increase yield without resulting in color contamination of the paper produced and with minimal capital expenditure |
| 06/23/2009 | CA2443640C Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 06/17/2009 | CN101457496A Solving method of black liquor pollution in pulp-making of cotton linter |
| 06/17/2009 | CN100500991C Process for reclaiming and comprehensively utilizing waste digestion liquid of alkaline (or neutral) straw pulp generated by sodium sulfite method |
| 06/16/2009 | US7547374 heat exchanging to conserve the heat in the black liquor withdrawn cooking fluid in order to heat the colder chips in the impregnation vessel |
| 06/16/2009 | CA2370561C Process for the production of furfural from lignosulphonate waste liquor |
| 06/16/2009 | CA2365407C Apparatus for gasification of spent liquor |
| 06/11/2009 | WO2009072980A1 Hose valve for feeding fine grained material |
| 06/11/2009 | WO2009072979A1 Method for controlling a hose valve |
| 06/11/2009 | WO2009072978A1 System for reception and transport of lime mud from a white liquor filter |
| 06/09/2009 | CA2365967C Process for the treatment of fly ash, using hydrochloric acid |
| 06/09/2009 | CA2364242C Method for producing polysulfides by means of electrolytic oxidation |
| 06/04/2009 | WO2009070110A1 Method for extracting ammonium salt and methanol from a liquid obtained from foul condensates in a cellulose pulp mill |
| 06/04/2009 | WO2009053518A3 Arrangement for evaporating liquids |
| 06/04/2009 | CA2706663A1 Method for extracting ammonium salt and methanol from a liquid obtained from foul condensates in a cellulose pulp mill |
| 06/02/2009 | US7540938 Recovering heat from pulp refining process by discharging pressurized pulp from high pressure refiner, wherein pulp comprises pressurized slurry of fibers and liquid; introducing liquid from pressurized pulp slurry to pressurized flash tank; exchanging heat from tank with water such that water is heated |
| 06/02/2009 | US7540937 Method for continuous cooking |
| 06/02/2009 | CA2475610C Process for causticizing green liquor in chemical recovery from black liquor in alkaline pulping |
| 05/28/2009 | WO2009067231A1 Use of polysulfide in modified cooking |
| 05/28/2009 | CA2705774A1 Use of polysulfide in modified cooking |
| 05/22/2009 | WO2009063122A1 Method and equipment for decomposing biomass molecular components continuously |
| 05/21/2009 | US20090126883 employing modified cooking technology in conjunction with polysulfide pulping technology in a cooking vessel to obtain higher pulping yields than previously obtained with either method; involves performing a cooking liquor "exchange" |
| 05/21/2009 | US20090126882 Generation of active polysulphide |
| 05/20/2009 | CN101435167A Cotton stalk non-chlorine bleaching and cleaning pulping process |
| 05/13/2009 | EP2058434A1 Herstellungsverfahren eines Papierblatts, das eine Fixierphase einer Mineralienladung auf Zellulosefasern umfasst |
| 05/13/2009 | CN101429736A Processing system and method for papermaking black liquor |
| 05/12/2009 | CA2381414C Process for preventing scaling of heat transfer surfaces |
| 05/07/2009 | WO2009030805A3 Method in the treatment of odorous gases of a chemical pulp mill |
| 05/07/2009 | US20090114353 Method of Papermaking |
| 05/07/2009 | US20090114352 Process and system for calcination of high solids kraft paper pulp mill lime mud |
| 04/30/2009 | WO2009053518A2 Arrangement for evaporating liquids |
| 04/29/2009 | CN100482887C Closed treatment method of paper-making waste water with sulfite |
| 04/22/2009 | CN201225176Y Waste heat power generation apparatus of CO2 working substance paper mill |
| 04/21/2009 | CA2484718C Method of producing energy at a pulp mill |
| 04/15/2009 | CN100478518C Method of preparing pulp by deinking ONP/OMG mixed wastepaper blended with paper making white water |
| 04/14/2009 | CA2259109C Kraft pulping process |
| 04/09/2009 | WO2009021216A3 Lignin dewatering process |
| 04/09/2009 | US20090089947 Cleaning device, cleaning tool and method of using the cleaning device |
| 04/08/2009 | EP2044184A1 Production of a refinery feedstock from soaps produced during a chemical pulping process |
| 04/01/2009 | EP1177344B1 Process and feeding system |
| 04/01/2009 | CN100473778C Method for recovering alkali of straw pulp papermaking |
| 03/25/2009 | CN101392469A Process for bleaching paper pulp and simultaneously degrading waste water COD by using high energy radiation |
| 03/12/2009 | WO2009030805A2 Method in the treatment of odorous gases of a chemical pulp mill |
| 03/12/2009 | US20090065158 Installation for implementing a method for producing paper pulp, lignins and sugars and production method using such an installation |
| 03/12/2009 | CA2694125A1 Method in the treatment of odorous gases of a chemical pulp mill |
| 03/11/2009 | CN101381968A Method for enhancing extraction rate of black liquor |
| 03/10/2009 | US7501042 Smelt is removed from the boiler via a smelt spout surrounded outside the boiler by a hood and a dispersion medium, preferably steam, is fed into the smelt flow falling from the smelt spout for shattering the smelt flow; wall of the hood is washed with liquid |
| 03/05/2009 | WO2009028969A1 Lignin and other products isolated from plant material, and methods and compositions therefor |
| 03/05/2009 | WO2008152189A3 Method for treating liquid flows at a chemical pulp mill |
| 03/05/2009 | WO2008152188A3 Method for treating pulp at a chemical pulp mill |
| 03/05/2009 | US20090056889 Detoxifying and Recylcing of Washing Solution Used In Pretreatment Of Lignocellulose-Containing Materials |
| 03/05/2009 | CA2697469A1 Lignin and other products isolated from plant material, and methods and compositions therefor |
| 03/04/2009 | EP2029479A2 Method for the catalytic oxidation of sulfide to sulfate |
| 03/04/2009 | CN101379242A Method for recovering hydrolysis products |
| 02/26/2009 | WO2008152187A3 Method for treating liquid flows at a chemical pulp mill |
| 02/25/2009 | EP1702101B1 Batch process for preparing pulp |
| 02/25/2009 | EP1402111B1 A method for treating circulation waters |
| 02/25/2009 | CN101374994A Method and arrangement for feeding chemicals into a process stream |
| 02/24/2009 | US7494637 Continuously feeding into heated reaction chamber biomass material and exogenous metal oxide or its precursor, wherein the metal oxide is capable of forming a hydrolizable metal carbide, to form reaction products; quenching |