| Patent Number |
Title Of Patent |
Date Issued |
| 5230773 |
Process for the recovery of heat and chemicals from spent liquor |
July 27, 1993 |
| 5213662 |
Treatment of chips with high temperature black liquor to reduce black liquor viscosity |
May 25, 1993 |
| 5213663 |
Method for controlling the sodium carbonate concentration of green liquor in the dissolving tank |
May 25, 1993 |
| 5213782 |
Clear liquor scrubbing magnesium-enhanced lime flue gas desulfurization process |
May 25, 1993 |
| 5205908 |
Purification of process gas from a partial combustion of black liquor |
April 27, 1993 |
| 5201172 |
Method for treating black liquor |
April 13, 1993 |
| 5194093 |
Process for the decoloration of sugar liquor |
March 16, 1993 |
| 5183535 |
Process for preparing kraft pulp using black liquor pretreatment reaction |
February 2, 1993 |
| 5178774 |
Purification of aqueous liquor |
January 12, 1993 |
| 5174860 |
Low temperature recovery of kraft black liquor |
December 29, 1992 |
| 5173318 |
Method and apparatus for aging a distilled liquor |
December 22, 1992 |
| 5158577 |
Process for precipitating alumina from Bayer process liquor |
October 27, 1992 |
| 5149442 |
Reduction of halogenated organic compounds in spent bleach liquor |
September 22, 1992 |
| 5145527 |
Apparatus for applying foamed treating liquor |
September 8, 1992 |
| 5143579 |
Treatment of black liquor with a screw extruder evaporator |
September 1, 1992 |
| 5143580 |
Process for reducing the amount of halogenated organic compounds in spent liquor from a peroxide... |
September 1, 1992 |
| 5143702 |
Two stage white liquor oxidation apparatus |
September 1, 1992 |
| 5144077 |
Process for working up the crystallization mother liquor from the resolution of the racemate of ... |
September 1, 1992 |
| 5133831 |
Method of concentrating black liquor by evaporation |
July 28, 1992 |
| 5127950 |
Short-prismatic aluminum hydroxide, process for preparing same from supersaturated sodium alumin... |
July 7, 1992 |
| 5127993 |
Method of enhancing green liquor semi-chemical pulp production |
July 7, 1992 |
| 5116507 |
Treatment for reducing impurities in aqueous liquor |
May 26, 1992 |
| 5112441 |
Process for the recovery of heat and chemicals from spent liquor |
May 12, 1992 |
| 5112500 |
Purification of aqueous liquor |
May 12, 1992 |
| 5110566 |
Chromatographic separation of zirconium isotopes with reduced waste liquor |
May 5, 1992 |
| 5108722 |
Sulfate removal from chlorate liquor |
April 28, 1992 |
| 5103522 |
Sequential oxidative and reductive bleaching in a multicomponent single liquor system |
April 14, 1992 |
| 5102426 |
Process for precipitating alumina from bayer process liquor |
April 7, 1992 |
| 5102544 |
Apparatus for continuously removing crystals from a mother liquor and for washing the crystals |
April 7, 1992 |
| 5095141 |
Process for pseudocumene oxidation to trimellitic acid with mother liquor recycle |
March 10, 1992 |
| 5093092 |
Purification of bayer process liquor with alumina coated with a layer or carbon |
March 3, 1992 |
| 5091562 |
Process for eliminating 1-carboxy-1-phosphonocyclopentan-3-one from, or reducing its content in,... |
February 25, 1992 |
| 5089087 |
Make-up liquor and black liquor evaporating process during pulp production |
February 18, 1992 |
| 5082526 |
Process of producing kraft pulping liquor by the oxidation of white liquor in the presence of li... |
January 21, 1992 |
| 5080756 |
Kraft pulping process with spent sulphuric acid addition to strong black liquor |
January 14, 1992 |
| 5068095 |
Method for reducing the amount of colorants in a caustic liquor |
November 26, 1991 |
| 5062960 |
Method and apparatus for recovering an acid from an acid-containing waste liquor |
November 5, 1991 |
| 5057191 |
Processing method or photographic processing waste liquor |
October 15, 1991 |
| 5053108 |
High sulfidity cook for paper pulp using black liquor sulfonization of steamed chips |
October 1, 1991 |
| 5047119 |
Method of stabilizing white liquor flow in the causticizing of green liquor from a kraft paper p... |
September 10, 1991 |
| 5035911 |
Process of producing liquor-included ice |
July 30, 1991 |
| 5034094 |
Method of converting inorganic materials from kraft pulping liquor into pulping chemicals withou... |
July 23, 1991 |
| 5032686 |
Method for the recovery of citric acid from a liquor containing the same |
July 16, 1991 |
| 5030474 |
Method for forming hydroxyapatite coating film using coating liquor containing hydroxyapatite |
July 9, 1991 |
| 5027891 |
Method for transferring heat between process liquor streams |
July 2, 1991 |
| 5013440 |
Flushing liquor decanter drag modification |
May 7, 1991 |
| 5013562 |
Liquor included ice |
May 7, 1991 |
| 5011571 |
Method for treating photographic process waste liquor through concentration by evaporation and a... |
April 30, 1991 |
| 5009906 |
Method and composition for filtering beer, ale or malt liquor to reduce multivalent metal cation... |
April 23, 1991 |
| 5004522 |
Method of treating photographic process waste liquor through concentration by evaporation |
April 2, 1991 |
