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Class Information
Number: 162/30.11
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > With regeneration, reclamation, reuse, recycling or destruction of digestion fluid > With destruction of organic ingredient in or smelting of liquor > Treatment of kraft pulping chemicals
Description: Subject matter wherein the waste liquor being treated results from the kraft (i.e., sulfate) process for paper fiber liberation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7604711 |
Method to optimize temperature profiles displacement batch cooking |
Oct. 20, 2009 |
| 7468176 |
Feeding device and process and feeding system which utilize the feeding device |
Dec. 23, 2008 |
| 7465372 |
Method for treatment of spent liquor |
Dec. 16, 2008 |
| 7371307 |
Kraft pulp yield by heat treatment of polysulphide liquors generated by oxidation |
May. 13, 2008 |
| 7300542 |
Method for inhibiting calcium salt scale |
Nov. 27, 2007 |
| 7294225 |
Process for production of synthesis gas in combination with the maintenance of the energy balance for a pulp mill |
Nov. 13, 2007 |
| 7270726 |
Method for the production of green liquor |
Sep. 18, 2007 |
| 7231714 |
Corrosion-resistant exterior alloy for composite tubes |
Jun. 19, 2007 |
| 7179437 |
Feeding device and process and feeding system which utilize the feeding device |
Feb. 20, 2007 |
| 7172677 |
Method for inhibiting calcium salt scale |
Feb. 6, 2007 |
| 7097739 |
Method for the production of improved pulp |
Aug. 29, 2006 |
| 6890404 |
Composition for the production of improved pulp |
May. 10, 2005 |
| 6887345 |
Process and device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances |
May. 3, 2005 |
| 6875414 |
Polysulfide measurement methods using colormetric techniques |
Apr. 5, 2005 |
| 6869503 |
Composition for inhibiting calcium salt scale |
Mar. 22, 2005 |
| 6821384 |
Process for the treatment of fly ash, using hydrochloric acid |
Nov. 23, 2004 |
| 6797125 |
Method of treating condensates |
Sep. 28, 2004 |
| 6790313 |
Method of cleaning sulfide contaminated condensates |
Sep. 14, 2004 |
| 6719879 |
Method for kraft waste reclamation |
Apr. 13, 2004 |
| 6691358 |
Oxidized white liquor in an oxygen delignification process |
Feb. 17, 2004 |
| 6632327 |
Process for treating spent, waste, alkaline digestion liquor from paper pulping operations and product |
Oct. 14, 2003 |
| 6627784 |
Highly efficient method of mixing dissimilar fluids using mechanically induced cavitation |
Sep. 30, 2003 |
| 6578529 |
Arrangement for feeding black liquor into a recovery boiler |
Jun. 17, 2003 |
| 6511578 |
Bleaching and delignifying cellulosic pulp using caroate/caro's acid solution |
Jan. 28, 2003 |
| 6503369 |
Process for producing cellulose and fertilizer by-product |
Jan. 7, 2003 |
| 6451164 |
Alkyleneamine composition for enhancing lime mud dewatering |
Sep. 17, 2002 |
| 6425976 |
Method for black liquor gasification in recovery boilers |
Jul. 30, 2002 |
| 6319358 |
Electrolytic causticizing of smelt from a kraft recovery furnace |
Nov. 20, 2001 |
| 6312560 |
Use of alkyleneamines for enhancing lime mud dewatering |
Nov. 6, 2001 |
| 6294048 |
Method for regenerating sodium hydroxide by partial autocausticizing sodium carbonate containing smelt by reaction with a borate |
Sep. 25, 2001 |
| 6261411 |
Process for kraft chemical recovery |
Jul. 17, 2001 |
| 6228214 |
Method for black liquor gasification in recovery boilers |
May. 8, 2001 |
| 6183598 |
Process for recovering alkali and black liquor containing silicatae |
Feb. 6, 2001 |
| 6168685 |
Process FOR oxidation of concentrated black liquor |
Jan. 2, 2001 |
| 6136144 |
Method of removing sulfur from a process gas stream using a packed bed calcinator |
Oct. 24, 2000 |
| 6132555 |
Method and arrangement for increasing evaporation capacity of a multi-stage evaporator of spent liquor in a pulp mill |
Oct. 17, 2000 |
| 6123806 |
Process for kraft chemical recovery |
Sep. 26, 2000 |
| 6113739 |
Process for washing gas formed by gasifying black liquor |
Sep. 5, 2000 |
| 6071377 |
Process for obtaining flue gases with low content of NO.sub.x in a black liquor recovery boiler |
Jun. 6, 2000 |
| 6059925 |
Method to regenerate gas mixture in ozone-bleaching process |
May. 9, 2000 |
| 6030493 |
Process for recovering chemicals and energy from cellulose spent liquor using multiple gasifiers |
Feb. 29, 2000 |
| 6027609 |
Pulp-mill recovery installation for recovering chemicals and energy from cellulose spent liquor using multiple gasifiers |
Feb. 22, 2000 |
| 5993601 |
Process for producing polysulphide by means of oxidizing sulphide in spent liquors from kraft cellulose cooking |
Nov. 30, 1999 |
| 5976318 |
Method for burning secondary sludge in a recovery boiler |
Nov. 2, 1999 |
| 5976319 |
Disrupting the flow from the smelt spout of a recovery boiler |
Nov. 2, 1999 |
| 5972165 |
Method of producing oxidized white liquor using dregs containing carbon particles |
Oct. 26, 1999 |
| 5944950 |
Process for the final evaporation of black liquor |
Aug. 31, 1999 |
| 5942084 |
Process for the separation of sulphides from pulping liquors using amphoteric resins |
Aug. 24, 1999 |
| 5922171 |
Method and apparatus for removing sodium chloride from pulping chemicals using an amphoteric ion-exchange resin |
Jul. 13, 1999 |
| 5922172 |
Combustion of black liquid and processing of lime sludge in a recovery boiler |
Jul. 13, 1999 |
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