| Patents for D21C 11 - Regeneration of pulp liquors (4,054) |
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| 12/26/2002 | US20020195213 Process for producing xylooligosaccharide from lignocellulose pulp |
| 12/26/2002 | US20020194849 Method and arrangement for producing electrical energy at a pulp mill |
| 12/25/2002 | CN1386928A Process for reclaiming sodium hydroxide from black pulping liquor |
| 12/19/2002 | US20020192146 Process for preparing polysulfides using clarified white liquor |
| 12/18/2002 | EP1266177A1 Arrangement for cleaning, airflow control and pushing away melt in air ports of incineration boilers |
| 12/18/2002 | EP1266075A1 Bleaching pulp |
| 12/18/2002 | CN2526344Y Special equipment for producing lignosulfonate from papermaking black liquor |
| 12/15/2002 | CA2396171A1 Process for preparing polysulfides using clarified white liquor |
| 12/11/2002 | EP1264041A1 Process for producing cellulose pulp and fertiliser containing potassium |
| 12/05/2002 | WO2002097243A1 Method and arrangement for producing electrical energy at a pulp mill |
| 12/04/2002 | EP0975645B1 Separating lignin solids and black liquor |
| 12/04/2002 | CN1095514C Process for degradating chlorinated ligning and its derivatives |
| 11/28/2002 | US20020174962 Process for bleaching lignocellulose pulp |
| 11/27/2002 | CN1381645A Process and equipment for treating black pulping liquid |
| 11/20/2002 | CN1380463A Method for extracting blank liquor in paper-making process by using rice and wheat straw |
| 11/19/2002 | CA2073419C A method of treating bctmp/ctmp wastewater |
| 11/13/2002 | EP1256549A1 Method for producing calcium carbonate |
| 11/13/2002 | CN1379152A Process for reclaiming waste digestion liquid of alkaline (or neutral) straw pulp generated by sodium sulfite method |
| 11/12/2002 | US6478235 Device for the cleaning of a liquor spray nozzle assembly of a soda recovery boiler |
| 11/07/2002 | WO2002043838A3 Method for the treatment of waste gas from a cellulose plant |
| 11/07/2002 | US20020162491 Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 11/04/2002 | EP1094987A4 Stable oxidizing bromine formulations, methods of manufacture thereof and methods of use for microbiofouling control |
| 10/30/2002 | CN1376825A Vacuum foam-removing system for black liquid |
| 10/30/2002 | CN1093581C Process for reclaiming neutral ammonium sulfite liquor to produce more lignin products |
| 10/23/2002 | CN2517765Y Multi-loop paper making black liquor concentrator |
| 10/23/2002 | CN1375598A Circular evaporation and concentration sewage-treating method and apparatus |
| 10/17/2002 | WO2002081971A1 Combustion air system for recovery boilers, burning spent liquors from pulping processes |
| 10/16/2002 | CN1374424A Comprehensive papermaking effluent treating process |
| 10/16/2002 | CN1374423A Closed treatment method of paper-making waste water with sulfite |
| 10/10/2002 | US20020144794 Oxidizing a white liquor with oxygen gas in the presence of lime mud, manganese dioxide or both, to a controlled temperature to increase the concentration of ultraviolet or visible radiation absorption |
| 10/09/2002 | CN1092269C Method of use of black liquor in production of glass |
| 10/02/2002 | EP1245723A1 Method for recovering chemicals in a process of producing pulp by kraft process |
| 10/02/2002 | EP1244845A1 Device for the cleaning of a liquor spray nozzle assembly of a soda recovery boiler |
| 10/02/2002 | EP1244844A1 Process for the treatment of fly ash, using hydrochloric acid |
| 10/02/2002 | EP1244843A1 Method and apparatus for controlling a causticizing process |
| 09/26/2002 | DE10107122A1 Verfahren zur Behandlung einer Sulfit- und Ammoniumionen enthaltenden, auf sulfoniertem Lignin basierenden Lauge mit Formaldehyd A process for the treatment of a sulfite and ammonium ion-containing, based on sulfonated lignin liquor with formaldehyde |
| 09/25/2002 | EP1242674A1 Process for preventing scaling of heat transfer surfaces |
| 09/25/2002 | EP0954632B1 A process for the separation of a sulphur-containing component from pulping liquors using amphoteric resins |
| 09/25/2002 | EP0820545B1 Process and apparatus for removing low concentration, high-volume non-condensable gases produced in a kraft pulping process |
| 09/25/2002 | CN2512805Y Recovering and treating device for waste liquid alkali from paper making |
| 09/19/2002 | US20020129910 Separation of black liquor to produce lignins substantially free of sodium |
| 09/18/2002 | EP1240385A1 Oxidised white liquor in an oxygen delignification process |
| 09/17/2002 | US6451164 Adding an effective water-removal rate enhancing amount of an alkyleneamine to the lime mud prior to filtration |
| 09/10/2002 | CA2223148C An arrangement in connection with the smelt spout of a recovery boiler |
| 09/10/2002 | CA2197312C Enhancements in pulping with dissolved solids control |
| 08/29/2002 | WO2002065885A1 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 |
| 08/29/2002 | US20020119083 Method and apparatus for controlling a causticizing process |
| 08/27/2002 | US6440379 Minimizing adverse impacts on causticizing operations with black liquor gasification; acidic sulfur gas (h2s or so2) is absorbed from a gas stream containing co2 into an aqueous alkaline solution |
| 08/20/2002 | CA2106310C Method of firing black liquor in recovery boilers and a recovery boiler for firing black liquor |
| 08/20/2002 | CA2049322C Process for preparing kraft pulp |
| 08/15/2002 | WO2002063095A1 Pipe system for receiving and transporting lime sludge from a white liquor filter |
| 08/14/2002 | CN1363737A Paper-making technology with sewage as usable water |
| 08/13/2002 | CA2229973C Method of inhibiting scaling in black liquor evaporators |
| 08/13/2002 | CA2083963C Process for the preparation of an aqueous solution of sodium compounds |
| 08/07/2002 | EP1193341A9 Method and apparatus for preparing green liquor |
| 08/06/2002 | CA2083717C Process for the partial combustion of cellulose spent liquor ii |
| 08/01/2002 | WO2002059417A2 Heat treatment of polysulphide containing white liquors |
| 07/31/2002 | CN2503107Y Paper-making black liquor two-way spray dryer |
| 07/31/2002 | CN1361328A Technological process capable of reusing digestion blank liquor in alkali paper pulp making |
| 07/30/2002 | US6425976 Method for black liquor gasification in recovery boilers |
| 07/30/2002 | US6425975 Process for concentrating soluble and colloidal substances in process waters |
| 07/30/2002 | US6425974 Process for treating wastewater from a bleach plant |
| 07/25/2002 | US20020096271 Use of alkyleneamines for enhancing lime mud dewatering |
| 07/24/2002 | CN2501905Y Multifunctional alkali recovery boiler |
| 07/24/2002 | CN1360108A Method for cleaning and utilizing paper-making sewage |
| 07/24/2002 | CN1088130C Method for reducing silicon, phosphor and aluminium content in green liquor |
| 07/24/2002 | CN1088040C Process for preparing calcium carbonate |
| 07/17/2002 | CN1358900A Method and equipment for treating black liquor of pulp making |
| 07/17/2002 | CN1087798C Extractino and equipment for centrifugal blowing type paper-making pulping cooking waste liquor |
| 07/16/2002 | CA2244981C Process for increasing the effectiveness of slag control chemicals for black liquor recovery and other combustion units |
| 07/11/2002 | WO2002053829A1 Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor |
| 07/11/2002 | US20020088568 Partial autocausticization of alkali liquors for wood pulping processes |
| 07/11/2002 | US20020088567 Method and apparatus for treating pulp |
| 07/10/2002 | CN2499430Y Ordered batch type treating system for white water from paper making |
| 07/09/2002 | CA2167922C A method of integrating bleaching and recovery in the production of pulp |
| 07/03/2002 | CN2498195Y Surged depositing dry-bed |
| 07/03/2002 | CN1087045C Cyclic process for treating black paper-making liquid of alkali pulping to recover useful resource |
| 07/03/2002 | CN1087004C Waste water treating mehtod by lime causticization |
| 07/02/2002 | CA2050818C Impregnation with black liquor prior to white liquor introduction |
| 06/27/2002 | WO2002049753A1 Improvements to oxidising processes by oxygen transfer within a liquid medium in a reactor under pressure |
| 06/27/2002 | US20020082458 Continuously feeding into heated reaction chamber biomass material and exogenous metal oxide or its precursor, wherein the metal oxide is capable of forming a hydrolizable metal carbide, to form reaction products; quenching |
| 06/27/2002 | US20020079075 Treatment of solid containing material derived from effluent |
| 06/26/2002 | EP0697904B1 Method for fractionating sulphite cooking liquor |
| 06/25/2002 | US6409882 Warm water loop for cooling the tall oil heads fraction, rather than the conventional use of cold water, prevents condensation and solidification of athraquinone pulping aid thus avoiding fouling of the cooling towers |
| 06/25/2002 | US6408771 Methods of improving productivity of black liquor recovery boilers |
| 06/19/2002 | CN1086363C Process for preparing calcium carbonate |
| 06/13/2002 | US20020069983 Pulp is bleached using potassium hydroxide; bleach concentrate is obtained from bleach filtrate, which is combined with ashes obtained from burning of lignin and organic matter recovered from pulp production to obtain fertilizer |
| 06/12/2002 | CN1086216C Method for burning siliceous spent liquor |
| 06/12/2002 | CN1086180C Process for treating waste paper-making liquor |
| 06/06/2002 | WO2002043838A2 Method for the treatment of waste gas from a cellulose plant |
| 06/06/2002 | DE10110464A1 Verfahren zur Reinigung von Abgas aus einer Zellstofffabrik A method for purifying exhaust from a pulp mill |
| 06/05/2002 | CN1352716A Method for separating lignocellulose-containing biomass |
| 05/30/2002 | WO2002042552A1 Process and device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances |
| 05/29/2002 | CN1351686A Process for producing cellulose pulp and fertiliser containing potassium |
| 05/29/2002 | CN1085757C Process for removing lignin from black liquor in making paper by soda pulping |
| 05/23/2002 | WO2002040768A1 A process for production of synthesis gas in combination with the maintenance of the energy balance for a pulp mill |
| 05/23/2002 | WO2002040767A1 Method for recovering non-fibrous substances from wood material |
| 05/23/2002 | US20020059995 Method for black liquor gasification in recovery boilers |
| 05/23/2002 | US20020059994 Acid is added to the lignocellulosic material rendering the lignin insoluble; salts, especially sodium salts, are precipitated out of the process. |
| 05/22/2002 | CN1350090A Method of treating paper-making black liquor and producing high-temperature iron oxide red |