| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 09/19/2012 | CN102686795A Method and equipment for treatment of black liquor at pulp mill |
| 09/19/2012 | CN102677530A Low-carbon papermaking method |
| 09/19/2012 | CN102677518A Papermaking sewage purification process |
| 09/13/2012 | WO2012091906A3 Process for reducing one or more insoluble solids in a black liquor |
| 09/13/2012 | CA2829174A1 Separation of lignin from plant material |
| 09/12/2012 | EP2496758A1 Method and equipment for treatment of black liquor at pulp mill |
| 09/12/2012 | CN102666976A Method of treating liquid flows at a chemical pulp mill |
| 09/12/2012 | CN102666975A Method and process for dry discharge in a pressurized pretreatment reactor |
| 09/12/2012 | CN102659161A Process for preparing white mud calcium carbonate from green liquor recovered from wood pulp sulfate-method pulping alkali |
| 09/07/2012 | WO2012117161A1 Method of recovering chemicals |
| 09/05/2012 | CN102078726B Causticized muddy white liquid purifying technique |
| 09/05/2012 | CN101775750B A clear pulp production process for realizing complete comprehensive utilization and removing three wastes |
| 08/29/2012 | CN102650109A Method for transforming pulping black liquor into powders containing fulvic acid and amino acid by complex microorganisms |
| 08/28/2012 | US8252141 Method for recovering a low sodium content lignin fuel from black liquor |
| 08/28/2012 | CA2543741C Arrangement in recovery boiler |
| 08/23/2012 | WO2012054947A3 Method for production of lignin |
| 08/23/2012 | WO2012047832A3 Process for the production of alcohols from biomass |
| 08/22/2012 | CN102644913A Residual heat utilization method of cooling water for black liquor recovery boiler chute and system thereof |
| 08/21/2012 | US8246779 Maintenance of sulfur concentration in Kraft pulp processes |
| 08/15/2012 | EP2212468B1 Use of polysulfide in modified cooking |
| 08/15/2012 | CN102635011A Recycling comprehensive utilization technology for pulping black liquor or red liquor |
| 08/09/2012 | WO2012104492A1 Method for production of dimethyl sulfone by oxidation of a methanol based medium obtained from a sulfate cellulose process |
| 08/09/2012 | WO2012104491A1 Method of making purified methanol from a liquefied fraction obtained from a sulfate pulp process |
| 08/08/2012 | CN202369850U Steam ball steam recycling device |
| 08/08/2012 | CN101760975B Circulation process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber |
| 08/01/2012 | CN102625778A Method of producing sodium hydroxide from an effluent of fiber pulp production |
| 08/01/2012 | CN102619123A Method for removing silicon from green liquor through synergism of calcium oxide, carbon dioxide and aluminum-containing compound |
| 07/25/2012 | CN202347345U Novel black liquid spray gun inlet sealing device of soda recovery furnace |
| 07/25/2012 | CN102182095B Method for recycling ethanol pulping waste liquor |
| 07/25/2012 | CN101914863B Process for extracting papermaking black liquor by steaming |
| 07/25/2012 | CN101746781B Protecting device of dissolving tank inner wall of alkali recovery furnace |
| 07/19/2012 | WO2012054812A3 Method for biological treatment of hydrolyzate from pulp washing by balancing chemical oxygen demand |
| 07/18/2012 | CN102596800A Fractionation of a waste liquor stream from nanocrystalline cellulose production |
| 07/18/2012 | CN102587187A Alkali recovery method for by-producing activated carbon and white carbon black by using paper making black liquid |
| 07/18/2012 | CN102584540A Technology for transforming biomass into organic acid by using papermaking black water |
| 07/11/2012 | EP2473670A1 Method and assembly for processing cellulose pulp of wood processing industry |
| 07/11/2012 | CN202323539U 碱回收炉的供风装置 Recovery furnace air supply device |
| 07/11/2012 | CN102561086A Method for preparing spindle crystal form alkali recovery white clay |
| 07/11/2012 | CN102561085A Technology for removing water insoluble matter in pulping black liquor |
| 07/11/2012 | CN102561084A Resource treatment technology for black liquor |
| 07/10/2012 | CA2584500C Cooling system for ports in a boiler |
| 07/05/2012 | WO2012091906A2 Process for reducing one or more insoluble solids in a black liquor |
| 07/05/2012 | WO2012088619A1 Process for obtaining tall oil from a sodium sesquisulfate solution |
| 07/05/2012 | US20120168101 Process for reducing one or more insoluble solids in a black liquor |
| 07/05/2012 | CA2822813A1 Process for reducing one or more insoluble solids in a black liquor |
| 07/05/2012 | CA2804057A1 Process for obtaining tall oil from a sodium sesquisulfate solution |
| 07/04/2012 | CN102002878B Method for recovering slurry from papermaking sewage |
| 07/04/2012 | CN101899794B Green process for extracting fibers from plants |
| 07/04/2012 | CN101748633B Novel cellulose extraction process |
| 06/27/2012 | EP1694909B1 Method and plant for handling a mixture of liquor and soap, and a plant for conversion of fibre material to pulp |
| 06/27/2012 | CN102517973A Novel method for pulping and comprehensive utilization of straw |
| 06/27/2012 | CN102517952A Treatment method of digesting waste steam produced by soda pulping process |
| 06/27/2012 | CN102512937A Method for recycling hydrogen sulfide waste gas |
| 06/26/2012 | CA2526406C Chemimechanical desilication of nonwood plant materials |
| 06/20/2012 | EP2464599A1 Fractionation of a waste liquor stream from nanocrystalline cellulose production |
| 06/20/2012 | CN101845766B Method and device for gasifying pulping black liquor and reclaiming directly causticized alkali |
| 06/13/2012 | CN102493257A Masson pine dissolving pulp and production method thereof |
| 06/13/2012 | CN102493256A Eucalyptus dissolving pulp and production method thereof |
| 06/13/2012 | CN102493252A Energy-saving process of steam-electricity pulp paper using coal gas |
| 06/13/2012 | CN102493251A Papermaking red liquor sugar component using method |
| 06/13/2012 | CN101876153B Process for spraying and drying kraft pulp black liquor |
| 06/13/2012 | CN101506340B Production of a refinery feedstock from soaps produced during a chemical pulping process |
| 06/13/2012 | CN101155958B Process and apparatus for conversion of biomass |
| 06/06/2012 | CN101838946B Method for comprehensively treating silicon tetrachloride and papermaking pulping black liquor |
| 06/05/2012 | US8193324 Continuous counter-current organosolv processing of lignocellulosic feedstocks |
| 05/31/2012 | US20120132379 Method for obtaining cellulose from biomass comprising lignocellulose |
| 05/30/2012 | CN202247509U Evaporation and concentration system for papermaking sludge and black liquor |
| 05/30/2012 | CN202247508U Black liquor heating processing system for recovering alkali |
| 05/30/2012 | CN102071587B Method for removing black colloid substances in papermaking white mud of flue gas desulfurization absorbent |
| 05/30/2012 | CN101538815B Scale inhibitor in green liquor manufacturing system, inhibiting method and green liquor manufacturing system |
| 05/23/2012 | CN102472006A 生产纸浆的方法 Pulp production methods |
| 05/23/2012 | CN102465466A 回收造纸白水中纤维的装置 The papermaking fibers in the white water recovery means |
| 05/23/2012 | CN102041703B Process for removing silicon in green liquor of papermaking alkali recovery section by seeding |
| 05/23/2012 | CN101831827B Preparation method of paper making black liquid semi-coke |
| 05/23/2012 | CN101831826B Paper making pulping black liquid crystallization and evaporation method |
| 05/23/2012 | CN101379242B Method for recovering hydrolysis products |
| 05/23/2012 | CN101258116B Method for arranging chemical barrier in gasifying reactor for black liquor, chemical gasifying reactor, barrier layer of reactor and method for manufacturing building block for such a barrier layer |
| 05/18/2012 | WO2012062353A1 Method for using waste water arising during the production of lignocellulosic fibrous materials |
| 05/16/2012 | CN102454133A Pulping agent and method for applying same to production |
| 05/10/2012 | WO2012059133A1 Method for recovering chemicals from wastewater produced in the production of lignocellulosic fibrous materials |
| 05/09/2012 | EP1345684B1 Improvements to oxidising processes by oxygen transfer within a liquid medium in a reactor under pressure |
| 05/08/2012 | US8172981 Separating lignin from black liquor by precipitation, suspension and separation |
| 05/03/2012 | CA2813798A1 Method for the preparation of lignin |
| 04/26/2012 | WO2012054797A1 Method and apparatus for pretreatment of hydrolyzate for an anaerobic biotreatment |
| 04/26/2012 | WO2012052619A1 Method and arrangement for separating contaminants from liquids or vapors |
| 04/26/2012 | CA2815166A1 Method and arrangement for separating contaminants from liquids or vapors |
| 04/25/2012 | EP2443069A1 System and method for treating process water with separate separation of gases and solids |
| 04/25/2012 | CN102428040A Composition for inhibiting calcium salt scale formation |
| 04/25/2012 | CN102425075A Device and method for extracting and separating lignin in papermaking black liquor |
| 04/25/2012 | CN102424437A Method for treating prehydrolysis liquid of bamboo dissolving pulp |
| 04/25/2012 | CN101711229B Concurrent anaerobic digestion and fermentation of lignocellulosic feedstocks |
| 04/24/2012 | US8163137 Apparatus for cleaning and/or cooling a liquor gun in a chemical recovery boiler |
| 04/19/2012 | WO2012049375A1 Continuous method for the precipitation of lignin from black liquor |
| 04/19/2012 | CA2814793A1 Continuous method for the precipitation of lignin from black liquor |
| 04/18/2012 | EP2440703A1 Method for precipitating lignin from black liquor by utilizing waste gases |
| 04/18/2012 | EP1828473B1 Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 04/18/2012 | CN102421961A 改进的从回收锅炉中浸提静电除尘器灰的工艺 Improved extraction process electrostatic precipitator ash from the recovery boiler |
| 04/18/2012 | CN101775751B 甘蔗渣黑液燃烧碱回收方法 Recovery bagasse black liquor combustion method |
| 04/11/2012 | EP2198035B1 Method and equipment for production of glucose, ethanol, furfural, furane and lignin from renewable raw materials |
| 04/11/2012 | EP1969175B1 A novel catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein |