| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 07/13/2004 | CA2282849C Process for treating wastewater |
| 07/01/2004 | WO2004055264A1 System and method for utilizing the heat of smelting fume in papermaking and eliminating the pollution of black lye and the exhaust gas and residue of smelting |
| 07/01/2004 | US20040123813 Black liquor gun |
| 06/22/2004 | US6752903 Method for mitigating the interference caused by high-molecular weight by-products in pulping processes |
| 06/22/2004 | US6752902 Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp |
| 06/17/2004 | WO2004050987A1 Method for enhancing separation of soap from black liquor |
| 06/17/2004 | US20040112783 Sanitary thin paper and method of manufacturing the thin paper, storage box for sanitary thin paper, storage body for sanitary thin paper, inter folder, and device and method for transfer of storage body for sanitary thin paper |
| 06/10/2004 | WO2004048681A1 A method for the production of green liquor |
| 06/10/2004 | US20040107597 Process and device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances |
| 06/09/2004 | CN2619967Y Papermaking device capable of removing black liquor contamination |
| 06/08/2004 | US6746568 Treatment of filtrates from peroxide bleaching of pulp |
| 06/03/2004 | WO2004046456A1 Method and arrangement in making of mechanical pulp |
| 06/02/2004 | EP1424435A2 Method of reducing nitrogen oxide emissions in a chemical pulp mill |
| 06/01/2004 | US6742463 Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 05/27/2004 | US20040099386 Filtration of colloids from defibering, delignification, washing or bleaching of wood pulp, baggase or straws using membrane; efficiency |
| 05/21/2004 | WO2004042140A1 Process for producing kraft pulp |
| 05/19/2004 | EP0950136B1 Treatment of bleach plant filtrates with oxygen |
| 05/19/2004 | CN1150366C Partial autocausticization of alkali liquors for wood pulping processes |
| 05/11/2004 | US6733625 Method and apparatus for treating pulp |
| 05/11/2004 | CA2156411C Process and apparatus for absorbing hydrogen sulphide |
| 05/06/2004 | WO2004038092A2 Systems and methods for generating polysulfides |
| 05/06/2004 | EP1416083A1 Black liquor nozzle |
| 05/06/2004 | EP1030944B1 Method and device for removal of soda melt from a soda recovery unit |
| 05/01/2004 | CA2447569A1 Black liquor gun |
| 04/29/2004 | US20040079498 Cooking process using hot black liquor |
| 04/22/2004 | WO2003014467A3 Production of pulp from cellulosic fibrous raw materials and recovery of chemicals and energy from pulp liquors |
| 04/20/2004 | US6722130 Method of producing process steam from a black liquor |
| 04/20/2004 | CA2398488C Enhancements in pulping with dissolved solids control |
| 04/15/2004 | US20040069721 Pipe system for receiving and transporting lime sludge from a white liquor filter |
| 04/14/2004 | EP1408153A1 System for feeding combustion air in a soda recovery boiler |
| 04/13/2004 | US6719879 Method for kraft waste reclamation |
| 04/08/2004 | WO2004029356A1 Method for obtaining a fraction |
| 04/07/2004 | EP1266075B1 Bleaching pulp |
| 04/07/2004 | EP1194376A4 Method for causticisation of alkaline solutions |
| 04/07/2004 | EP1027141A4 Reactor mixing assembly |
| 04/07/2004 | CN1486937A Microfiltration film separation technology for straw pulp balck liquor |
| 04/07/2004 | CN1486936A Microfiltration film separation and reuse technology for papermaking intermediate waste water |
| 04/07/2004 | CN1486776A United treatment method of papermaking black liquor and smelting smoke dust |
| 03/31/2004 | EP1402153A1 Method and arrangement for producing electrical energy at a pulp mill |
| 03/31/2004 | EP1402111A1 A method for treating circulation waters |
| 03/25/2004 | WO2004025020A1 Alkaline process for the manufacturing of pulp using alkali metaborate as buffering alkali |
| 03/25/2004 | US20040055968 Comprises purge of gas formed overhead which ensures partial pressure of oxidation; papermaking |
| 03/25/2004 | US20040055716 Process for production of synthesis gas in combination with the maintenance of the energy balance for a pulp mill |
| 03/25/2004 | US20040055715 Treatment of solid containing material derived from effluent |
| 03/25/2004 | CA2497277A1 Alkaline process for the manufacturing of pulp using alkali metaborate as buffering alkali |
| 03/24/2004 | CN1484721A Improved kraft pulp yield by heat treatment of polysulphide liqurs generated by oxidation |
| 03/24/2004 | CN1143024C Method of reducing the silicon content of green liquor |
| 03/16/2004 | CA2198719C Cooking with spent liquor pretreatment of cellulose material |
| 03/10/2004 | CN1481462A Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor |
| 03/10/2004 | CN1141441C Alkali recovery from paper making black liquor by wet method |
| 03/04/2004 | US20040040830 Recovering, separation, distillation |
| 03/02/2004 | CA2175666C Implementation of dissolved solids profiling |
| 02/17/2004 | US6691358 Oxidized white liquor in an oxygen delignification process |
| 02/12/2004 | WO2004013409A1 Apparatus and method for treating black liquor |
| 02/04/2004 | EP1386111A1 Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 02/04/2004 | CN1137307C Method for treating process water |
| 01/29/2004 | WO2004009901A1 Process and apparatus for producing thermal and electric energy |
| 01/28/2004 | CN1136358C Black liquor treatng and caustic soda recovering method for crop stalk pulping process |
| 01/28/2004 | CN1136357C Treatment of filtrates from peroxide bleaching of pulp |
| 01/22/2004 | US20040011484 Combusting waste liquor from pulping procedure in furnace of recovery boiler to generate flue gases; recovering heat from flue gases to produce saturated steam; gasifying a solid wood-based material; burning combustible gas; superheating |
| 01/21/2004 | CN2600476Y Soda recovery causticization green liquor digestion drum |
| 01/21/2004 | CN2600475Y Scraper-trough conveyer tank of soda recovery combustion injection furnace |
| 01/15/2004 | WO2004005611A1 Carbonizing of black liquor |
| 01/15/2004 | WO2004005610A1 Method for treatment of spent liquor |
| 01/15/2004 | CA2491897A1 Carbonizing of black liquor |
| 01/14/2004 | CN2599049Y Device for using smelting residual heat in paper making to eliminate paper making black lacquer and smeltnig waste gas waste slag pollution |
| 01/06/2004 | US6672227 Arrangement for cleaning, airflow control and pushing away melt in air ports of incineration boilers |
| 01/01/2004 | US20040000381 Polynuclear compounds derived from an organic solution |
| 12/31/2003 | CN2595853Y Device for extracting lignin from paper-making black liquor |
| 12/30/2003 | CA2159998C Dissolved solids control in pulp production |
| 12/30/2003 | CA2134730C Chlorine-free bleaching with short sequence and filtrate recirculation |
| 12/25/2003 | US20030234088 Treatment of solid containing material derived from effluent |
| 12/18/2003 | WO2003104547A1 System for producing energy at a pulp mill |
| 12/17/2003 | CN1461849A Method of producing battery negative electrode additive lignin from paper making black liquor by atkali pulping method |
| 12/17/2003 | CN1131350C Alkali recovery process for black liquor of straw pulp |
| 12/16/2003 | US6663749 Sodium hydroxide is regenerated from sodium carbonate-containing smelts in pulp processes by autocauticization through the addition of limited amount of trisodium borate |
| 12/10/2003 | EP1368532A1 Pipe system for receiving and transporting lime sludge from a white liquor filter |
| 12/10/2003 | EP1368531A1 Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor |
| 12/10/2003 | CN1460532A Strong expression blade type filter |
| 12/09/2003 | CA2285276C Separating lignin solids and black liquor |
| 12/04/2003 | US20030221804 Lignins derived from black liquor |
| 12/03/2003 | CN1459420A Method of treating papermaking black liquid and recovery alkali and lignin using electroosmosis method |
| 11/27/2003 | US20030217822 Pressure diffuser having gas vent for cooking liquor |
| 11/26/2003 | EP1190137B1 Method for separating lignocellulose-containing biomass |
| 11/26/2003 | EP0931195B1 Evaporation apparatus for evaporation of liquids, such as spent liquor from pulp cooking |
| 11/26/2003 | CN1458335A Water treating method in pulping industry |
| 11/26/2003 | CN1128898C Making process of acid pulping effluent product |
| 11/20/2003 | WO2003095738A1 Exhalation system |
| 11/19/2003 | EP1196641B1 Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp |
| 11/18/2003 | US6647726 Method and arrangement for producing electrical energy at a pulp mill |
| 11/05/2003 | EP1358384A1 Method for recovering non-fibrous substances from wood material |
| 11/05/2003 | EP0896648B1 Hydrogen sulphide pretreatment of lignocellulosic material in continuous pulping processes |
| 11/05/2003 | CN2584642Y Treatment system for removing silicon from concentrated black liquid in soda recovery process |
| 10/29/2003 | EP1356156A2 Heat treatment of polysulphide containing white liquors |
| 10/22/2003 | CN1450227A Method for recovering alkali and organic substance from pomace and waste liquid |
| 10/16/2003 | US20030194361 Feeding device and process and feeding system which utilise the feeding device |
| 10/15/2003 | EP1352124A1 Process and device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances |
| 10/14/2003 | US6632327 Process for treating spent, waste, alkaline digestion liquor from paper pulping operations and product |
| 10/02/2003 | WO2003031348A3 Process for recovering and recycling compounds contained in effluents of delignification and bleaching processes in pulp mills |
| 10/01/2003 | CN2576768Y Solar water-content separation device |