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Class Information
Number: 162/31
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 > Flames combustion
Description: Processes in which organic constituent suspended in a liquid is oxidized in situ, without removing all the liquid.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7553394 |
Method for removing potassium from ash produced in a kraft pulping process recovery boiler using a Na-type cation exchange organic resin |
Jun. 30, 2009 |
| 7207280 |
Combustion air system for recovery boilers, burning spent liquors from pulping processes |
Apr. 24, 2007 |
| 6500301 |
Apparatus for gasification of spent liquor |
Dec. 31, 2002 |
| 6425976 |
Method for black liquor gasification in recovery boilers |
Jul. 30, 2002 |
| 6408771 |
Methods of improving productivity of black liquor recovery boilers |
Jun. 25, 2002 |
| 6287415 |
Arrangement in soda recovery boiler for removing melts for maintenance |
Sep. 11, 2001 |
| 6228214 |
Method for black liquor gasification in recovery boilers |
May. 8, 2001 |
| 6186080 |
Recovery boiler |
Feb. 13, 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 |
| 6155210 |
Process for obtaining flue gases with low content of NO.sub.x while combusting black liquor and a recovery boiler therefor |
Dec. 5, 2000 |
| 6071377 |
Process for obtaining flue gases with low content of NO.sub.x in a black liquor recovery boiler |
Jun. 6, 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 |
| 5992337 |
Methods of improving productivity of black liquor recovery boilers |
Nov. 30, 1999 |
| 5989387 |
Method for controlling chloride concentration in the flue gas of a recovery boiler |
Nov. 23, 1999 |
| 5976318 |
Method for burning secondary sludge in a recovery boiler |
Nov. 2, 1999 |
| 5814189 |
Method for gasifying cellulose spent liquor to produce superheated steam and green liquor of low carbonate concentration |
Sep. 29, 1998 |
| 5746886 |
Method for the recovery of energy and chemicals from cellulose spent liquor containing potassium using a gasifier |
May. 5, 1998 |
| 5707490 |
Method of recovering energy from waste liquors from pulp processes |
Jan. 13, 1998 |
| 5683549 |
Process for the partial combustion of cellulose spent liquor using twin fluid nozzle burner |
Nov. 4, 1997 |
| 5683550 |
Method and apparatus for increasing recovery boiler capacity by withdrawing combustible gas from the furnace |
Nov. 4, 1997 |
| 5672246 |
Increasing the capacity of a recovery boiler by withdrawing some of the exhaust gases from the furnace section |
Sep. 30, 1997 |
| 5660685 |
Gasifying black liquor with recycling of generated hydrogen sulphide gas to the gasifier |
Aug. 26, 1997 |
| 5637192 |
Endothermic spent liquor recovery process |
Jun. 10, 1997 |
| 5632858 |
Method for gasifying cellulosic waste liquor using an injector located within the bed of fluidized material |
May. 27, 1997 |
| 5603803 |
Method and apparatus for recovering heat in a spent liquor recovery boiler |
Feb. 18, 1997 |
| 5562804 |
Method for adjusting the sulphur/sodium ratio in the flue gases of a soda recovery boiler |
Oct. 8, 1996 |
| 5549788 |
Minimal effluents discharge pulp mill with chemical recovery |
Aug. 27, 1996 |
| 5547543 |
Apparatus for minimizing effluent discharges and recovering chemicals in a pulp mill |
Aug. 20, 1996 |
| 5509997 |
Method of recovering energy from waste liquors from pulp processes |
Apr. 23, 1996 |
| 5507912 |
Kraft pulping process wherein sulphide-rich and sulphide-lean white liquors are generated |
Apr. 16, 1996 |
| 5486269 |
Gasification of carbonaceous material in a reactor having a gasification zone and a combustion zone |
Jan. 23, 1996 |
| 5454908 |
Recovery boiler and method of reducing NO.sub.x emissions |
Oct. 3, 1995 |
| 5439557 |
Method of recovering energy and chemicals from a spent liquor using low frequency sound in a recovery boiler |
Aug. 8, 1995 |
| 5425850 |
CFB black liquor gasification system operating at low pressures |
Jun. 20, 1995 |
| 5405496 |
Process for the preparation of cooking liquors having high sulphidity for sulphate pulp cooking |
Apr. 11, 1995 |
| 5380402 |
Reducing pulp mill liquid discharge |
Jan. 10, 1995 |
| 5374333 |
Method for minimizing pulp mill effluents |
Dec. 20, 1994 |
| 5368471 |
Method and apparatus for use in monitoring and controlling a black liquor recovery furnace |
Nov. 29, 1994 |
| 5364502 |
Control of recovery boiler operation by IR spectroscopy |
Nov. 15, 1994 |
| 5360514 |
Treatment of bleach plant filtrations using a magnesium filter |
Nov. 1, 1994 |
| 5352333 |
Process for the partial combustion of cellulose spent liquor using twin-fluid nozzle burner |
Oct. 4, 1994 |
| 5340440 |
Method for recovering chemicals using recovery boiler having at least 2 different melt sections |
Aug. 23, 1994 |
| 5302246 |
Method of managing liquid steams in a pulp mill |
Apr. 12, 1994 |
| 5300191 |
Chlorine dioxide generation for a zero discharge pulp mill |
Apr. 5, 1994 |
| 5284550 |
Black liquier gasification process operating at low pressures using a circulating fluidized bed |
Feb. 8, 1994 |
| 5246542 |
Evaporation and recovery process for bleached chemical thermo-mechanical pulp (BCTMP) effluent |
Sep. 21, 1993 |
| 5139412 |
Method and apparatus for profiling the bed of a furnace |
Aug. 18, 1992 |
| 5133831 |
Method of concentrating black liquor by evaporation |
Jul. 28, 1992 |
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