| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 12/15/2005 | CA2579390A1 Method for reducing nitrogen oxide emissions |
| 12/15/2005 | CA2568594A1 Method for producing a dissovling pulp |
| 12/14/2005 | CN1231632C Arundo donax pulp, paper products and particle board |
| 12/08/2005 | WO2005116329A1 Method and device for cleaning of filter |
| 12/08/2005 | WO2005116327A1 Central screen |
| 12/08/2005 | CA2567046A1 Central screen |
| 12/01/2005 | US20050263108 Retractable liquor gun holder for a recovery furnace |
| 11/29/2005 | CA2368872C Method for separating lignocellulose-containing biomass |
| 11/17/2005 | US20050252624 Process and apparatus for producing thermal and electric energy |
| 11/17/2005 | US20050252458 System for producing energy at a pulp mill |
| 11/16/2005 | CN1227409C Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor |
| 11/15/2005 | CA2371281C Ultra-high particulate collection of sub-micron aerosols |
| 11/09/2005 | CN1694987A Process for producing kraft pulp |
| 11/02/2005 | CN1225586C Improved alkali recovering process from paper-making black liquor |
| 11/02/2005 | CN1225585C Increasing causticizing efficiency of alkaling pulping liquor by borate addition |
| 11/01/2005 | CA2283698C Method for preparing alkaline solutions containing aromatic polymers |
| 11/01/2005 | CA2203242C Process for the final evaporation of black liquor |
| 10/27/2005 | WO2005100681A1 Method and device for washing of lime mud |
| 10/18/2005 | US6955743 Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor |
| 10/18/2005 | CA2118464C Method of separating sodium hydroxide from white liquor |
| 10/18/2005 | CA2118463C Method of producing sodium hydroxide from white liquor |
| 10/12/2005 | CN2732805Y Device for drying and recovering waste pulps and mushy materials |
| 10/06/2005 | WO2005092484A1 System and method for admixing a liquid state medium to a liquid state flow |
| 10/05/2005 | CN1221709C Method of producing battery negative electrode additive lignin from paper making black liquor by atkali pulping method |
| 09/27/2005 | CA2346915C Method for producing cellulose |
| 09/20/2005 | US6946057 Alkaline process for the manufacturing of pulp using alkali metaborate as buffering alkali |
| 09/15/2005 | US20050199358 Slaking lime with water to form a lime slurry; separating rough lime grits from the lime slurry; sifting; adding green liquor obtained by dissolving a smelt formed by evaporating and burning black liquor in alkaline pulping into a depurator; adding green liquor and slurry into causticizer |
| 09/13/2005 | US6942754 Process for producing xylooligosaccharide from lignocellulose pulp |
| 09/07/2005 | EP1570125A1 A method for the production of green liquor |
| 09/06/2005 | US6939439 Batch process for producing chemical pulp by removing and reintroducing calcium-containing spent liquor in the digester |
| 09/06/2005 | CA2188857C Method of reducing corrosion in a power boiler of a pulp mill |
| 08/30/2005 | CA2274712C Processes for preparing calcium carbonate |
| 08/24/2005 | EP1566480A1 Process for producing kraft pulp |
| 08/24/2005 | CN2719897Y Centrifugal slag crusher |
| 08/24/2005 | CN1659332A System for producing energy at a pulp mill |
| 08/23/2005 | US6932000 System for feeding combustion air in a soda recovery boiler |
| 08/18/2005 | WO2005075730A1 A method to destabilize foams and to prevent foaming of fatty acid and/or resin acid soap containing liquids |
| 08/17/2005 | EP1563138A1 Method and arrangement in making of mechanical pulp |
| 08/11/2005 | WO2005056917A3 Method and apparatus for improving the causticizing process |
| 08/10/2005 | CN1653228A Method of producing energy at a pulp mill |
| 08/04/2005 | US20050167060 Treatment of solid containing material derived from effluent |
| 08/03/2005 | CN2714600Y Solution circulation spraying falling-film evaporator |
| 08/03/2005 | CN1648335A Method for treating and reusing pulp bleaching waste water in size washing |
| 08/03/2005 | CN1648333A Circulation pulping device for no-boiling biochemical solvent continuous dipping catalyst cracking |
| 08/03/2005 | CN1213197C Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals |
| 08/02/2005 | US6923888 Process for recovering organic acids from bleaching liquors |
| 07/21/2005 | US20050155730 Delignification catalyst is an aqueous quinone; wood impregnation step using alkaline pulping liquor comprising boron compounds; white liquor sulfidity below twenty five percent; extract cellulose spent liquor comprising tall oil soap |
| 07/20/2005 | EP1554429A2 Systems and methods for generating polysulfides |
| 07/20/2005 | CN1641100A Method for recovering superfine calcium carbonate by clean causticization of green liquor |
| 07/19/2005 | CA2112802C Production of pulp by the soda-anthraquinone process (sap) with recovery of the boiling chemicals |
| 07/14/2005 | WO2005064075A1 Batch process for preparing pulp |
| 07/14/2005 | US20050153832 Polysulfide generation using a manganese dioxide catalyst assembly and method of making the assembly |
| 07/14/2005 | CA2530704A1 Batch process for preparing pulp |
| 07/06/2005 | CN1636091A Paper plant - method and apparatus for producing pulp from cellulosic fibrous raw materials and recovering chemicals and energy from pulp liquors |
| 06/30/2005 | WO2005059242A1 Method and plant for handling a mixture of liquor and soap, and a plant for conversion of fibre material to pulp |
| 06/30/2005 | WO2005058969A1 Method for purifying aggregates that are contaminated with macromolecular carbohydrates and/or the degradation products thereof |
| 06/29/2005 | CN1208514C Method for separating lignocellulose-containing biomass |
| 06/28/2005 | CA2203096C Batch process for preparing improved kraft pulp |
| 06/23/2005 | WO2005056917A2 Method and apparatus for improving the causticizing process |
| 06/22/2005 | EP1543193A1 Alkaline process for the manufacturing of pulp using alkali metaborate as buffering alkali |
| 06/22/2005 | CN1207462C Circular evaporation and concentration sewage-treating method |
| 06/21/2005 | CA2359406C Arrangement for feeding black liquor into a recovery boiler |
| 06/21/2005 | CA2274784C Process for preparing calcium carbonate |
| 06/16/2005 | WO2005054572A1 Treatment of spent pulping liquor with lignin separation to recover alkali pulping chemiclas in manufacture of paper pulp |
| 06/16/2005 | US20050126726 Method for making Arundo donax paper product |
| 06/09/2005 | US20050123734 Arundo donax pulp and related methods |
| 06/09/2005 | US20050123733 Arundo donax paper product |
| 06/08/2005 | EP1538256A2 Implementation of dissolved solids profiling |
| 06/07/2005 | CA2149755C System and device for supplying oxygen-containing gas into a furnace |
| 06/02/2005 | WO2005019526A3 System and method for controlling a processor including a digester utilizing time-based assessments |
| 06/02/2005 | US20050115691 Cooking of cellulose pulp in a cooking liquor containing preevaporated black liquor |
| 05/26/2005 | US20050109370 Cleaning device, cleaning tool and method of using the cleaning device |
| 05/25/2005 | EP1532313A1 Carbonizing of black liquor |
| 05/25/2005 | CN1203231C Waste-liquid treatment method for straw pulp paper-making |
| 05/19/2005 | WO2005045126A1 Methods for producing pulp and treating black liquor |
| 05/19/2005 | DE10347920A1 Verfahren und Vorrichtung zum Beladen einer Faserstoffsuspension Method and apparatus for loading a fiber suspension |
| 05/19/2005 | CA2544426A1 Methods for producing pulp and treating black liquor |
| 05/18/2005 | CN1616761A Less chlorine bleaching and middle section water full closed recycling technology of alkaline sodium sulfite straw pulp |
| 05/18/2005 | CN1616759A Ecological balance pulping method without pollution |
| 05/12/2005 | US20050098280 Quinone based catalysts combined with delignification using alkaline solutions of sodium metaborate (NaBO2) and sodium carbonate (Na2CO3) as major components can efficiently delignify lignocellulosic material |
| 05/12/2005 | US20050098037 Method for the treatment of waste gas from a cellulose plant |
| 05/10/2005 | CA2286144C Use of reverse osmosis membranes to treat evaporator clean condensate |
| 05/04/2005 | EP1319103B1 Process for recovering organic acids from bleaching liquors |
| 05/03/2005 | US6887345 Process and device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances |
| 04/28/2005 | WO2005038127A1 Method and device for charging a fiber material suspension |
| 04/26/2005 | CA2313857C Method and apparatus for optimizing the combustion air system in a recovery boiler |
| 04/20/2005 | EP1524241A1 A method for producing sodium dithionite to be used in the bleaching of mechanical pulp |
| 04/20/2005 | CN1607296A Super critical water oxidation process for soda cooking black liquor |
| 04/14/2005 | WO2005033404A1 Desulphurization of odorous gases of a pulp mill |
| 04/14/2005 | US20050079117 Slaking quick lime with white liquor; forming calcium carbonate; continuous adding to green liquor; used for paper filler |
| 04/14/2005 | US20050076568 Partial oxidation of cellulose spent pulping liquor |
| 04/13/2005 | CN1196647C Method for producing polysulfide by electrolytic oxidation |
| 04/12/2005 | CA2164328C Combustion of black liquor and processing of lime sludge in a recovery boiler |
| 04/12/2005 | CA2161790C Method for fractionating sulphite cooking liquor |
| 04/07/2005 | US20050072539 Kraft pulp yield by heat treatment of polysulphide liquors generated by oxidation |
| 04/06/2005 | EP1520071A1 Method for treatment of spent liquor |
| 04/06/2005 | CN1603514A Cleaner production of paper by straw and lignin modification process |
| 04/05/2005 | US6875414 Polysulfide measurement methods using colormetric techniques |
| 04/05/2005 | US6874449 Black liquor gun |
| 03/31/2005 | WO2005028743A1 Black liquor extracting method in manufacturing straw pulp |