| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 07/08/2008 | CA2273470C Increasing causticizing efficiency of alkaline pulping liquor by borate addition |
| 07/03/2008 | WO2008079072A1 Method for recovering a low sodium content lignin fuel from black liquor |
| 07/02/2008 | CN101210396A Paper-making black liquor fluidized bed alkali reclaiming device and method |
| 07/02/2008 | CN101210395A Method for treating straw slurry black liquor by using ammonium sulfite method |
| 07/02/2008 | CN101210182A Method for producing soil restoring agent by using straw slurry black liquor |
| 06/25/2008 | CN101205692A Alkali recovery process for cotton linter soda pulping black liquor |
| 06/12/2008 | WO2007120091A8 Method for separating polymeric pentose from a liquid/slurry |
| 06/11/2008 | CN101195971A Technique for regenerating non discharge sewage of paper making industry |
| 06/10/2008 | US7384501 Cooking lignocellulose in a digester and conduction of spent liquors displaced from digester to pressurized tanks, wherein spent liquors displaced from the digester is caused to expand against a pressure; vapor is conducted to turpentine recovery |
| 05/29/2008 | WO2008063123A1 Leaching of chloride and potassium from electric filter ashes |
| 05/29/2008 | US20080121356 Mixing liquor with acid or gas which forms an acid upon contact with water to initiate precipitation of carbohydrate; adding carboxylated carbohydrate and cationic polymer wherein precipitate aggregates into larger precipitate structures;selectively removing carbohydrate gel; purifying lignin |
| 05/28/2008 | EP1924739A1 Apparatus and method for producing energy at a pulp mill |
| 05/28/2008 | CN101187182A Novel use of waste water of BVT pulping in process for detergent alkaline for recovering white mud |
| 05/21/2008 | EP1922296A2 Method for arranging a chemical barrier in a gasifying reactor for black liquor, a chemical gasifying reactor, a barrier layer of a reactor and a method for manufacturing a building block for such a barrier layer |
| 05/15/2008 | WO2008057031A1 A method and equipment for the evaporation of black liquor that is obtained from a digestion process during the production of cellulose pulp |
| 05/13/2008 | US7371307 Oxidizing green liquor with lime and manganese dioxide then holding resulting white liquor at controlled temperature to increase levels of activated polysulfide form as determined by ultraviolet radiation adsorption; minimizing degradation of cellulose and hemicellulose |
| 05/07/2008 | CN201056657Y Black liquor treatment device for paper making |
| 05/07/2008 | CN201056656Y Black liquor treatment device for paper making |
| 05/06/2008 | CA2219550C A method of recovery of chemical compounds from a pulp mill |
| 04/29/2008 | US7364640 Prepulping; refining; filtration; dehydration; adjustment of pH; separation |
| 04/24/2008 | WO2008046959A1 A method and device for emptying the floor of a soda recovery boiler |
| 04/24/2008 | CA2665721A1 A method and device for emptying the floor of a soda recovery boiler |
| 04/23/2008 | CN101165267A Pulping technique for straw fibre |
| 04/17/2008 | WO2008044984A1 An apparatus and a method for cleaning |
| 04/17/2008 | WO2007135184A3 Method for the catalytic oxidation of sulfide to sulfate |
| 04/16/2008 | CN101163833A Apparatus and method for producing energy at a pulp mill |
| 04/03/2008 | US20080078516 Composite panels, pulp, paper; conventional pulping processes, produce a high tensile strength pulp, lighter color than wood pulp, and uses less bleaching chemicals to achieve a desired whiteness; can be combined with wood pulp to produce a variety of products |
| 04/02/2008 | CN101155958A Process and apparatus for conversion of biomass |
| 04/02/2008 | CN101153471A Non-process sealing circulation technology for wastewater from pulp and paper making by non-delignify reaction |
| 04/01/2008 | US7351306 Cooking of cellulose pulp in a cooking liquor containing pre-evaporated black liquor |
| 04/01/2008 | CA2222986C Method for oxidation of waste liquors containing organic matter |
| 03/25/2008 | CA2357548C A method of cleaning sulfide contaminated condensates |
| 03/12/2008 | CN101139806A Alkali process and iminium process straw pulp black liquor hybrid dry matter and preparation method thereof |
| 03/06/2008 | CA2661304A1 Process and system for producing commercial quality carbon dioxide from high solids lime mud |
| 03/05/2008 | CN101135120A Process for manufacturing natural antibiotic bamboo pulp by dendrocalamus giganteus non-sulfate method |
| 02/28/2008 | US20080051566 Method For Separating Lignin From A Lignin Containing Liquid/Slurry |
| 02/28/2008 | US20080047674 Method for Separating Lignin from Black Liquor |
| 02/27/2008 | EP0977919B1 Separating alkali metals from gasified black liquor |
| 02/26/2008 | CA2453246C Use of thinnings and other low specific gravity wood for lyocell products method |
| 02/21/2008 | WO2006029478A3 Effluent treatment process |
| 02/14/2008 | WO2008018358A1 Agent for accelerating dehydration of lime mud |
| 01/30/2008 | CN201012999Y Paper-making black liquor alkali reclaimer |
| 01/30/2008 | CN101113026A Technology and process for paper making wastewater circulation |
| 01/29/2008 | CA2253301C Hydrogen sulphide pretreatment of lignocellulosic material in continuous pulping processes |
| 01/23/2008 | CN201010819Y Papermaking wastewater treating tank |
| 01/17/2008 | WO2008006190A1 Production of a refinery feedstock from soaps produced during a chemical pulping process |
| 01/16/2008 | EP1878827A2 Implementation of dissolved solids profiling |
| 01/16/2008 | EP1155184B1 Method of producing process steam from a black liquor |
| 01/10/2008 | WO2007087408A3 Method and arrangement for feeding chemicals into a process stream |
| 01/09/2008 | CN101100825A Method for reducing black liquor bleed in closed screening |
| 01/09/2008 | CN101100818A Pulping technique for straw fibre |
| 01/02/2008 | EP1873303A2 Dissolved solids control in pulp production |
| 01/02/2008 | CN101096825A Subsection harnessing devil liquor zero discharge and comprehensive utilization paper stuff cleaning manufacturing technique method |
| 12/27/2007 | CA2657447A1 Variable orifice black liquor nozzle |
| 12/26/2007 | CN200996115Y Advanced treatment recovery apparatus for papermaking waste water |
| 12/19/2007 | CN101089286A Black liquor recovery agent for pulp making process |
| 12/18/2007 | CA2317873C Arrangement in soda recovery boiler |
| 11/29/2007 | WO2007136889A1 Apparatus for cleaning a smelt spout of a combustion device |
| 11/29/2007 | WO2007135184A2 Method for the catalytic oxidation of sulfide to sulfate |
| 11/29/2007 | WO2006085762A8 Process and apparatus for conversion of biomass |
| 11/29/2007 | CA2651483A1 Methods for carbonate pretreatment and pulping of cellulosic material |
| 11/28/2007 | EP1859101A1 Process and apparatus for conversion of biomass |
| 11/27/2007 | US7300542 Effective amount of selected phosphonates or phosphonate blends is admixed with black liquor composition recovered from digester in chemical pulping process; suited for Kraft pulping process |
| 11/27/2007 | US7300539 Treatment of solid containing material derived from effluent |
| 11/20/2007 | US7297225 Process for high temperature peroxide bleaching of pulp with cool discharge |
| 11/15/2007 | US20070261806 Treatment of Pulp Stocks Using Oxidative Enzymes to Reduce Pitch Deposition |
| 11/13/2007 | US7294225 Process for production of synthesis gas in combination with the maintenance of the energy balance for a pulp mill |
| 11/08/2007 | CA2545493A1 Pork and paper process |
| 11/07/2007 | CN101067287A Producing technology for microcrystalline cellulose with waste acid cotton linter |
| 11/06/2007 | US7291245 Process for causticizing green liquor in chemical recovery from black liquor in alkaline pulping |
| 11/06/2007 | CA2309832C Method and device for removal of soda melt from a soda recovery unit |
| 11/01/2007 | US20070251891 Method and Device for Cleaning of Filter |
| 10/31/2007 | CN101065536A Method and apparatus for thickening lime mud in a disc filter |
| 10/31/2007 | CN101063278A Method for hybrid giant napier producing in oxygen free radical doffing/bleaching integrated reactor with dried bananas stalk |
| 10/25/2007 | WO2007120091A1 Method for separating polymeric pentose from a liquid/slurry |
| 10/24/2007 | CN101061351A Cooling system for ports in a boiler |
| 10/16/2007 | US7282115 Method for mitigating the interference caused by high-molecular weight-by-products in pulping processes |
| 10/10/2007 | CN101050600A Combined producing process for realizing zero discharge and comprehensively utilizing in pulp production by using filter film technology |
| 10/09/2007 | CA2348516C Method of producing process steam from a black liquor |
| 10/04/2007 | US20070231231 convert nitrogen oxides to hydrogen cyanide, then combustion and converting the hydrogen cyanide into nitrogen; efficient and low cost to control the emissions of harmful greenhouse gas; air pollution control; environmentally friendly |
| 10/03/2007 | CN101046073A Improved fiberline systems, processes and methods |
| 09/27/2007 | US20070221346 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 |
| 09/27/2007 | US20070221345 Method and Device for Washing of Lime Mud |
| 09/26/2007 | EP1836345A1 Method and apparatus for thickening lime mud in a disc filter |
| 09/26/2007 | CN200952097Y Reaction device for producing nitrogen modified lignin utilizing industrial lignin |
| 09/26/2007 | CN101044356A Boiler arrangement |
| 09/25/2007 | CA2430389C Improved kraft pulp yield by heat treatment of polysulphide liquors generated by oxidation |
| 09/20/2007 | US20070215300 Solvents For Use In The Treatment Of Lignin-Containing Materials |
| 09/18/2007 | US7270726 Providing a smelt of Na2S and Na2CO3 from a soda boiler, conveying the smelt from a soda boiler to a dissolving tank, providing a weak liquor in a vessel that contains dissolved NaOH and CaO, adding a solution of NaOH to the weak liquor in the vessel to precipitate CaO, dissolving the smelt |
| 09/12/2007 | CN101033588A Treatment method and device for alkaline straw pulp paper making black liquor |
| 09/05/2007 | EP1828473A1 Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 09/05/2007 | CN200943164Y Straw plasm paper making alkali recovery system |
| 09/05/2007 | CN101028944A Composite electrolytic bath and method for electrolyzing and decoloring pulp-making effluent |
| 08/30/2007 | US20070199670 Sanitary tissue paper, method of producing the same, carton box for sanitary tissue paper, sanitary tissue paper package, interfolder, and apparatus and method of conveying sanitary tissue paper package |
| 08/28/2007 | US7261869 Slaking quick lime with white liquor; forming calcium carbonate; continuous adding to green liquor; used for paper filler |
| 08/22/2007 | EP1820897A1 Method of manufacturing pulp and articles made therefrom |
| 08/22/2007 | EP1178009B1 Method for producing polysulfide by use of electrolytic oxidation |
| 08/16/2007 | WO2007090926A1 Method for recovering hydrolysis products |
| 08/16/2007 | WO2007090925A1 Method for recovering hydrolysis products |
| 08/16/2007 | CA2641686A1 Method for recovering hydrolysis products |