| Patent Number |
Title Of Patent |
Date Issued |
| 7291245 |
Process for causticizing green liquor in chemical recovery from black liquor in alkaline pulping |
Nov. 6, 2007 |
| 7261869 |
Processes for preparing calcium carbonate |
Aug. 28, 2007 |
| 6348129 |
Treatment of pulp mill condensate with ozone |
Feb. 19, 2002 |
| 5984987 |
Black liquor gasification process |
Nov. 16, 1999 |
| 5738758 |
Process for the conversion of calcium sulfide |
Apr. 14, 1998 |
| 5695604 |
Method for reprocessing an ozone-containing gas present in a pulp bleaching plant |
Dec. 9, 1997 |
| 5637192 |
Endothermic spent liquor recovery process |
Jun. 10, 1997 |
| 5628872 |
Method for bleaching pulp with hydrogen peroxide recovered from cellulosic spent liquor |
May. 13, 1997 |
| 5628875 |
Method for clarifying green liquor by monitoring the calcium concentration in the spent liquor prior to or at combustions |
May. 13, 1997 |
| 5597445 |
Method for recovering sodium from a spent cooking liquor |
Jan. 28, 1997 |
| 5582683 |
Method for the recovery of chemical values from black liquor in multiple streams of different chemical values |
Dec. 10, 1996 |
| 5562804 |
Method for adjusting the sulphur/sodium ratio in the flue gases of a soda recovery boiler |
Oct. 8, 1996 |
| 5545385 |
Process for recovering alkali metal hydroxide from organic liquors |
Aug. 13, 1996 |
| 5527427 |
High solids black liquor of reduced viscosity and viscosity reduction method for high solids black liquor |
Jun. 18, 1996 |
| 5518582 |
Method of affecting the sulphur content and/or sulphur compound composition of a melt in a recovery boiler |
May. 21, 1996 |
| 5509998 |
Method and apparatus for clarifying green liquor |
Apr. 23, 1996 |
| 5419812 |
Method for regulating sulfur dioxide emissions from a recovery furnace |
May. 30, 1995 |
| 5405496 |
Process for the preparation of cooking liquors having high sulphidity for sulphate pulp cooking |
Apr. 11, 1995 |
| 5382322 |
Selective white liquor oxidation |
Jan. 17, 1995 |
| 5376351 |
Process for preparing calcium sulphate |
Dec. 27, 1994 |
| 5368731 |
Vacuum assisted slaker classifier |
Nov. 29, 1994 |
| 5332565 |
Manufacture of ferric sulphate compounds |
Jul. 26, 1994 |
| 5326433 |
Multi-level sulfide content white liquor production and utilization in cellulose pulping |
Jul. 5, 1994 |
| 5234546 |
Polysulfide production in white liquor |
Aug. 10, 1993 |
| 5205908 |
Purification of process gas from a partial combustion of black liquor |
Apr. 27, 1993 |
| 5204069 |
Recovery boiler smelt shattering spray |
Apr. 20, 1993 |
| 5194241 |
Manufacture of hydroxylated ferric sulphate compound |
Mar. 16, 1993 |
| 5194240 |
Manufacture of ferric sulphate |
Mar. 16, 1993 |
| 5145556 |
Single-stage slaking and causticizing method |
Sep. 8, 1992 |
| 4941945 |
Method for clarifying green liquor |
Jul. 17, 1990 |
| 4911787 |
Method for concentrating black liquor with oxidizing followed by CO.sub.2 addition |
Mar. 27, 1990 |
| 4894217 |
Process for causticizing of an aqueous solution containing alkali carbonate |
Jan. 16, 1990 |
| 4889592 |
Process and apparatus for control in burning and slaking of lime and causticizing |
Dec. 26, 1989 |
| 4857282 |
Combustion of black liquor |
Aug. 15, 1989 |
| 4857146 |
Process for increasing the solids content of black liquor at its recovery in a sulfate pulping process |
Aug. 15, 1989 |
| 4808264 |
Process for chemicals and energy recovery from waste liquors |
Feb. 28, 1989 |
| 4799994 |
Process for cooking and bleaching pulp |
Jan. 24, 1989 |
| 4773918 |
Black liquor gasification process |
Sep. 27, 1988 |
| 4770742 |
Method for increasing the efficiency of a causticizing process |
Sep. 13, 1988 |
| 4762590 |
Causticizing process |
Aug. 9, 1988 |
| 4761204 |
Chemical recovery process using break up steam control to prevent smelt explosions |
Aug. 2, 1988 |
| 4738835 |
Method of recovering alkali chemicals from flue gases containing alkali metal vapor |
Apr. 19, 1988 |
| 4735683 |
Process for preparation of potassium salts from pulp of lignocellulosic materials |
Apr. 5, 1988 |
| 4725335 |
Process for producing nitrogen oxides from aqueous waste cellulose pulp liquor containing nitrogen compounds |
Feb. 16, 1988 |
| 4718978 |
Spent pulping liquor recovery process |
Jan. 12, 1988 |
| 4710269 |
Recovering chemicals from spent pulp liquors |
Dec. 1, 1987 |
| 4692209 |
Recovery of chemicals from pulp waste liquor |
Sep. 8, 1987 |
| 4682985 |
Gasification of black liquor |
Jul. 28, 1987 |
| 4659020 |
Quick adjustable shatter jet mechanism |
Apr. 21, 1987 |
| 4637858 |
Pyrolysis of black liquor at high temperatures using radiant energy |
Jan. 20, 1987 |
