| Patent Number |
Title Of Patent |
Date Issued |
| 5746886 |
Method for the recovery of energy and chemicals from cellulose spent liquor containing potassium... |
May 5, 1998 |
| 5740745 |
Process for increasing the effectiveness of slag control chemicals for black liquor recovery and... |
April 21, 1998 |
| 5741920 |
Inhibition of re-absorption of migrating dyes in the wash liquor |
April 21, 1998 |
| 5736007 |
Method of liquor removal from particulate solids |
April 7, 1998 |
| D393209 |
Liquor flask |
April 7, 1998 |
| 5733341 |
Inhibition of dye migration in a wash liquor |
March 31, 1998 |
| 5728180 |
Adsorbent combinations for enhanced removal of sodium oxalate from bayer process spent liquor |
March 17, 1998 |
| 5728265 |
Process for enhancing white liquor penetration into wood chips by contacting the chips with a mi... |
March 17, 1998 |
| 5719101 |
Porous granular material obtained from wool scouring liquor, method for the manufacture thereof ... |
February 17, 1998 |
| 5715763 |
Combustion system for a black liquor recovery boiler |
February 10, 1998 |
| 5716496 |
Method and apparatus for treatment of black liquor |
February 10, 1998 |
| 5705031 |
Process for removing and washing dregs from green liquor in a kraft pulp mill |
January 6, 1998 |
| 5705032 |
Black liquor viscosity control |
January 6, 1998 |
| 5705542 |
Waste liquor derived from chemical thermal pulping of particle boards and fibreboards containing... |
January 6, 1998 |
| 5701829 |
Apparatus for recovering heat in a spent liquor recovery boiler |
December 30, 1997 |
| 5698109 |
Purification of aqueous liquor |
December 16, 1997 |
| 5686512 |
Process for manufacturing a surfactant from paper-making black liquor resin for exploitation of ... |
November 11, 1997 |
| 5683549 |
Process for the partial combustion of cellulose spent liquor using twin fluid nozzle burner |
November 4, 1997 |
| 5679217 |
Method and apparatus for optimizing the liquor-to-wood ratio during the production of paper pulp |
October 21, 1997 |
| 5667633 |
Method of producing white liquor streams of high and low sulphidity |
September 16, 1997 |
| 5662774 |
Adjusting the sulphur balance of a sulphate cellulose plant by heat treating black liquor in a l... |
September 2, 1997 |
| 5660685 |
Gasifying black liquor with recycling of generated hydrogen sulphide gas to the gasifier |
August 26, 1997 |
| 5660686 |
Cooking with spent liquor pretreatment of cellulose material |
August 26, 1997 |
| 5653947 |
Method of treating alumina trihydrate containing bauxite of low reactive silica content to form ... |
August 5, 1997 |
| 5645616 |
Black liquor gasifier |
July 8, 1997 |
| 5645726 |
Treatment of waste liquor in a vertical shaft bioreactor |
July 8, 1997 |
| 5643468 |
Method and apparatus for displacing liquor from a slurry of particulate solid material |
July 1, 1997 |
| 5637192 |
Endothermic spent liquor recovery process |
June 10, 1997 |
| 5637225 |
Method for fractionating sulphite cooking liquor |
June 10, 1997 |
| 5637287 |
Synthesis process for faujasite family zeolites using mother liquor recycle |
June 10, 1997 |
| 5634950 |
Black liquor gasifier |
June 3, 1997 |
| 5635024 |
Process for separating lignins and dissolved organic compounds from kraft spent liquor |
June 3, 1997 |
| 5635027 |
Method of reducing the viscosity of a black liquor |
June 3, 1997 |
| 5632858 |
Method for gasifying cellulosic waste liquor using an injector located within the bed of fluidiz... |
May 27, 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 p... |
May 13, 1997 |
| 5624470 |
Black liquor gasification with integrated warm-up and purge |
April 29, 1997 |
| 5624545 |
Production of polysulphide by electrolysis of white liquor containing sulphide |
April 29, 1997 |
| 5618443 |
Clarification of green liquor by falling film cross-flow filtration |
April 8, 1997 |
| 5618511 |
Process for producing ammonium sulfate from flue-gas scrubber waste liquor |
April 8, 1997 |
| 5607548 |
Process for dividing the sulphide content of the green liquor for the production of white liquor... |
March 4, 1997 |
| 5607549 |
Method for the manufacture of cooking liquors of different sulphidity by green liquor crystalliz... |
March 4, 1997 |
| 5603803 |
Method and apparatus for recovering heat in a spent liquor recovery boiler |
February 18, 1997 |
| 5601648 |
Apparatus for applying treating liquor to a traveling textile web |
February 11, 1997 |
| 5597445 |
Method for recovering sodium from a spent cooking liquor |
January 28, 1997 |
| 5593855 |
Method of using yeast to recover phytin by precipitation from cornsteep liquor or light steep wa... |
January 14, 1997 |
| 5589032 |
Process for preparing a bleaching liquor containing percarboxylic acid and caro's acid |
December 31, 1996 |
| 5582683 |
Method for the recovery of chemical values from black liquor in multiple streams of different ch... |
December 10, 1996 |
| 5582684 |
Method of determining degree of reduction in a sulfate liquor using IR and UV spectroscopy |
December 10, 1996 |
| 5575890 |
Method for selectively increasing the sulfide ion concentration and sulfidity of kraft cooking l... |
November 19, 1996 |
