| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 08/15/2007 | CN101016704A Method of preparing pulp by deinking ONP/OMG mixed wastepaper blended with paper making white water |
| 08/07/2007 | CA2186697C Method and apparatus used in treatment of melt |
| 08/02/2007 | CA2640138A1 Method and arrangement for feeding chemicals into a process stream |
| 08/01/2007 | EP1812753A1 Cooling system for ports in a boiler |
| 07/24/2007 | US7247587 Prepreg having a matrix resin and a saturable resin nonwoven impregnated with a fluoropolymer floc, a wettable structural organic floc, and a binder; used as liner substrate for self-lubricating bearings, as a sealant, in filters, and as a dielectric and in papermaking |
| 07/18/2007 | CN100999880A Process and product of pulping and mfg. sheet using low tar tabacco straw by biotransferring and swelling |
| 07/18/2007 | CN100999876A Purifying treating process of paper making green liquid and application of abtained white mud |
| 07/11/2007 | EP1805457A1 Boiler arrangement |
| 07/11/2007 | CN2921076Y Paper-making waste water treatment recovery tower |
| 07/10/2007 | US7241389 Comprises purge of gas formed overhead which ensures partial pressure of oxidation; papermaking |
| 07/05/2007 | WO2007075574A1 Polyareneazole/thermoset pulp and methods of making same |
| 07/05/2007 | CA2629908A1 Polyareneazole/thermoset pulp and methods of making same |
| 06/28/2007 | WO2007073333A1 System and method for the generation of steam from hot black liquor in a digester plant |
| 06/27/2007 | EP1801496A2 Shielding arrangement of the smelt spout area of a recovery boiler |
| 06/27/2007 | CN1989292A Method for black liquor treatment |
| 06/20/2007 | EP1797236A1 Method for separating lignin from a lignin containing liquid/slurry |
| 06/19/2007 | US7231714 Kraft chemicals are recovered from black liquor in a kraft recovery boiler having metal tubes subject to corrosive and cracking forces of the kraft recovery process, in a wall or floor of the boiler, wherein the improvement comprises that at least some of the tubes comprise composite tubes |
| 06/14/2007 | WO2007067127A1 A method for the purification of contamined aqueous liquid in a pulp or paper mill |
| 06/14/2007 | WO2007065241A1 A novel catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein |
| 06/14/2007 | US20070131363 Fiberline systems, processes and methods |
| 06/13/2007 | EP1794363A1 Method for separating lignin from black liquor |
| 06/13/2007 | CN1978785A Sludge dewatering method for waste paper deinking technology |
| 06/13/2007 | CN1321243C Method for recovering superfine calcium carbonate by clean causticization of green liquor |
| 06/12/2007 | US7229526 Method and apparatus for the feeding of fibers |
| 06/06/2007 | EP1356156B1 Heat treatment of polysulphide containing white liquors |
| 06/06/2007 | EP1092059B1 Partial autocausticization of alkali liquors for wood pulping processes |
| 06/06/2007 | CN1974923A Method for producing high polymer polyacrylamide adapted to paper-making black liquor processing |
| 06/06/2007 | CN1974858A Three-dimensional electrode for electrolysis, ion exchange membrane electrolytic cell and method of electrolysis using three-dimensional electrode |
| 06/06/2007 | CN1320205C Technology for mfg, high whiteness paper making filling light calcium carbonate recovered from lime mud |
| 06/05/2007 | CA2462751C Cleaning device, cleaning tool and method of using the cleaning device |
| 05/31/2007 | US20070119557 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 |
| 05/30/2007 | CN1318689C Production of paper by agricultural by-product straw and lignin modification process |
| 05/29/2007 | CA2200948C Liquid distributor for an evaporator |
| 05/23/2007 | CN2903157Y DC hot air drying apparatus for black liquor of making paper |
| 05/23/2007 | CN1317450C Method and arrangement in making of mechanical pulp |
| 05/16/2007 | CN2900602Y Vacuum pump system for net washing water recovery |
| 05/15/2007 | US7217302 Process for cooling solid and gaseous material during gasification of spent liquor |
| 05/08/2007 | US7214292 Addition of THP or THP+ salt to pulping liquors to destroy catalase and/or catalase producing bacteria |
| 05/03/2007 | WO2007030078A3 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 |
| 05/02/2007 | EP1778912A1 Central screen |
| 05/02/2007 | CN2895502Y Black-liquid dewatering centrifugal machine |
| 05/02/2007 | CN1313195C Method and apparatus for treating black liquor of paper pulp factory |
| 04/26/2007 | US20070092422 Method for processing flue gases |
| 04/25/2007 | EP1777338A1 A method for scrubbing flue gases |
| 04/25/2007 | CN2892937Y Paper-making black liquor hot air direct evaporating thickener |
| 04/24/2007 | US7207280 Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 04/24/2007 | CA2565358A1 Fiberline system and method using black liquor flashed steam |
| 04/24/2007 | CA2395937C Method for producing calcium carbonate |
| 04/18/2007 | CA2564444A1 A method for processing flue gases |
| 04/17/2007 | US7204914 System and method for controlling a processor including a digester utilizing time-based assessments |
| 04/11/2007 | CN1309901C Method of producing energy at a pulp mill |
| 04/04/2007 | EP1768765A1 Method for reducing nitrogen oxide emissions |
| 03/28/2007 | EP1766127A1 A method to destabilize foams and to prevent foaming of fatty acid and/or resin acid soap containing liquids |
| 03/28/2007 | CN1936176A Clean production method for rice-wheat straw pulp capable of poaching by acetic acid method |
| 03/21/2007 | CN1932146A Papermaking black liquor treatment technology |
| 03/20/2007 | CA2300114C Method for the recovery of formic acid |
| 03/15/2007 | WO2007030078A2 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 |
| 03/15/2007 | US20070056702 Arundo donax pulp, paper products and particle board |
| 03/15/2007 | CA2621188A1 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 |
| 03/13/2007 | CA2240861C A storage silo for lime mud product |
| 03/08/2007 | US20070051482 Method for kraft waste reclamation |
| 03/08/2007 | US20070051480 Method and apparatus for loading a fibrous stock suspension |
| 02/28/2007 | CN1920170A Method for lignin extraction by papermaking black liquor acidification and flocculation precipitation |
| 02/22/2007 | US20070039702 Purification of alkaline washing liquid |
| 02/21/2007 | EP1753908A1 Method for producing a chemical conversion pulp |
| 02/20/2007 | US7179437 Feeding device and process and feeding system which utilize the feeding device |
| 02/15/2007 | US20070036695 Shielding arrangement for the smelt spout area of a recovery boiler |
| 02/15/2007 | US20070034344 Desulphurization of odorous gases of a pulp mill |
| 02/14/2007 | CN1912240A Method for recovering alkali of straw pulp papermaking |
| 02/14/2007 | CN1300412C Acid separated filtrate treating method for paper-making black liquor |
| 02/11/2007 | CA2555929A1 Shielding arrangement for the smelt spout area of a recovery boiler |
| 02/07/2007 | CN1910320A Method for combusting an organic waste concentrate containing alkali metal compounds under oxidative conditions |
| 02/06/2007 | US7172677 Mixing a selected phosphonate with an aqueous digester composition to inhibit the formation, deposition and adherence of scale to metallic surfaces, particularly in commercial chemical pulp processing equipment |
| 01/31/2007 | EP1747319A1 Method and device for washing of lime mud |
| 01/18/2007 | WO2007006150A1 Method for quantitative determination of individual polysulphide species in oxidized white liquors by means of raman spectroscopy |
| 01/10/2007 | CN1891900A Pulp combined production technical method for sectional cycle zero-discharge and comprehensive utilization |
| 01/04/2007 | US20070000628 Method for removal of metals from a bleach plant filtrate stream |
| 01/04/2007 | US20070000627 Modified Kraft fibers |
| 01/03/2007 | CN1888305A Method for recovering papermaking black liquor liquid soda |
| 12/28/2006 | US20060288963 Arrangement in recovery boiler |
| 12/27/2006 | CN1886552A Methods for producing pulp and treating black liquor |
| 12/27/2006 | CN1291922C Nanometer titanium dioxide colloid microparticle flow aiding filter aid and preparing method thereof |
| 12/20/2006 | EP1090181B1 Increasing causticizing efficiency of alkaline pulping liquor by borate addition |
| 12/12/2006 | CA2308591C Method for measuring the properties of the stack and the corrosion of materials in a soda recovery unit |
| 12/06/2006 | EP1728919A1 Arrangement in recovery boiler |
| 12/06/2006 | EP1611281B1 Purification of alkaline washing liquid |
| 12/06/2006 | CN1288298C Process for producing kraft pulp |
| 12/02/2006 | CA2547491A1 Arrangement in recovery boiler |
| 11/30/2006 | WO2006126929A1 An apparatus and a method for cleaning an opening in a wall |
| 11/29/2006 | EP1726712A1 Arrangement in recovery boiler |
| 11/22/2006 | CN1285856C Process for burning black liquid papermaking by heat conductive oil furnace |
| 11/16/2006 | US20060254733 Method to lower the release of hazardous air pollutants from Kraft recovery process |
| 11/15/2006 | CN1863962A Method and device for charging a fiber material suspension |
| 11/14/2006 | CA2152017C Foam control agent |
| 11/09/2006 | US20060249098 Arrangement in recovery boiler |
| 11/02/2006 | EP0949201B1 Process for preparing calcium carbonate |
| 10/31/2006 | CA2151005C Foam control agent |
| 10/26/2006 | WO2006111608A1 Apparatus and method for producing energy at a pulp mill |
| 10/25/2006 | EP1442107B1 Brine separation in tall soap oil preparation |
| 10/19/2006 | US20060231222 Method and apparatus to decrease steam consumption in conventional batch digesters |