| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 5570584 |
Generator-Absorber heat exchange transfer apparatus and method using an intermediate liquor |
November 5, 1996 |
| 5556602 |
Device in a reactor for gasifying spent liquor |
September 17, 1996 |
| 5551354 |
Biased flow directional liquor nozzle |
September 3, 1996 |
| 5543117 |
System and method for heating and gasification of residual waste liquor |
August 6, 1996 |
| 5531906 |
Process for treatment of sodium hydroxide waste liquor containing aluminum |
July 2, 1996 |
| 5527427 |
High solids black liquor of reduced viscosity and viscosity reduction method for high solids bla... |
June 18, 1996 |
| 5509998 |
Method and apparatus for clarifying green liquor |
April 23, 1996 |
| 5510035 |
Method of separating sodium hydroxide from white liquor |
April 23, 1996 |
| 5500085 |
Method for producing fully oxidized white liquor |
March 19, 1996 |
| 5486342 |
Clear liquor scrubbing of sulfur dioxide with forced oxidation in flue gas desulfurization syste... |
January 23, 1996 |
| 5478440 |
Method and apparatus for improving the safety of a spent liquor recovery boiler |
December 26, 1995 |
| 5476583 |
Mixed liquor wasting system |
December 19, 1995 |
| 5472568 |
Method for controlling the viscosity of Kraft black liquor |
December 5, 1995 |
