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Class Information
Number: 162/33
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 > With mixing of liquors from different digestions
Description: Processes in which waste liquors from at least two different types of fiber digestion or treatment are mixed before or after destruction of the organic ingredient or smelting.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6350348 |
Batch cooking with black liquor pretreatment |
Feb. 26, 2002 |
| 6039837 |
Method of bleaching pulp with ozone wherein the acidity is maintained with an acid solution prepared by electrolysis or electrodialysis |
Mar. 21, 2000 |
| 5779856 |
Cooking cellulose material using high alkali concentrations and/or high pH near the end of the cook |
Jul. 14, 1998 |
| 5635026 |
Cooking cellulose material with high alkali concentrations and/or high pH |
Jun. 3, 1997 |
| 5626717 |
Oxidative treatment of bleach plant effluent |
May. 6, 1997 |
| 5540816 |
Method of integrating bleaching and recovery in the production of pulp |
Jul. 30, 1996 |
| 5246542 |
Evaporation and recovery process for bleached chemical thermo-mechanical pulp (BCTMP) effluent |
Sep. 21, 1993 |
| 5120448 |
Removal of AOX FRM bleach plant mill effluents by pH shift using the alkalinity/acidity sources available at the mill |
Jun. 9, 1992 |
| 4799994 |
Process for cooking and bleaching pulp |
Jan. 24, 1989 |
| 4507172 |
Kraft pulping process |
Mar. 26, 1985 |
| 4334956 |
Method of reutilizing kraft spent liquor |
Jun. 15, 1982 |
| 4253911 |
Process for maintaining a low sodium chloride content in recycled sodium chemicals of sodium-based pulp manufacturing processes |
Mar. 3, 1981 |
| 4249990 |
Process for removal of potassium values from pulp mill liquors |
Feb. 10, 1981 |
| 4155806 |
Method for continuous alkaline delignification of lignocellulose material in two or more steps, the final of which with oxygen |
May. 22, 1979 |
| 4153502 |
Process for the production of polysulphide pulping liquor from pulp mill recovery smelt |
May. 8, 1979 |
| 4138312 |
Process of recovering sodium carbonate from spent pulping liquors |
Feb. 6, 1979 |
| 4131508 |
Recovery system for oxygen bleaching of pulp |
Dec. 26, 1978 |
| 4118271 |
Method for the preparation of a pulp |
Oct. 3, 1978 |
| 4098639 |
Process for reducing the requirement of fresh chemicals without increasing emissions in the pulping of cellulosic material |
Jul. 4, 1978 |
| 4073678 |
High yield semichemical wood pulping process |
Feb. 14, 1978 |
| 4011129 |
Pulp mill recovery system |
Mar. 8, 1977 |
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