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Class Information
Number: 162/16
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Including recovery of organic by-product > From waste liquor
Description: Processes in which the organic material is recovered from waste fiber treating agent or liquor following its separation from the chemically treated fibers.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7396434 |
Catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein |
Jul. 8, 2008 |
| 7384501 |
Method for improved turpentine recovery from modern cooking plants |
Jun. 10, 2008 |
| 7294225 |
Process for production of synthesis gas in combination with the maintenance of the energy balance for a pulp mill |
Nov. 13, 2007 |
| 7189306 |
Process of treating lignocellulosic material to produce bio-ethanol |
Mar. 13, 2007 |
| 6955743 |
Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor |
Oct. 18, 2005 |
| 6923888 |
Process for recovering organic acids from bleaching liquors |
Aug. 2, 2005 |
| 6821382 |
Method and arrangement for cleaning contaminated condensate including a combined stripper/condenser |
Nov. 23, 2004 |
| 6752903 |
Method for mitigating the interference caused by high-molecular weight by-products in pulping processes |
Jun. 22, 2004 |
| 6632327 |
Process for treating spent, waste, alkaline digestion liquor from paper pulping operations and product |
Oct. 14, 2003 |
| 6540871 |
Method for processing black liquor sediment |
Apr. 1, 2003 |
| 6409882 |
Tall oil refining improvement |
Jun. 25, 2002 |
| 6245196 |
Method and apparatus for pulp yield enhancement |
Jun. 12, 2001 |
| 6183597 |
Method of producing a pulp from cellulosic material using formic acid and hydrogen peroxide |
Feb. 6, 2001 |
| 6179958 |
Method for continuous cooking of cellulose-containing fibre material |
Jan. 30, 2001 |
| 6165316 |
Method and plant for separating soap from black liquor using a pressure screen |
Dec. 26, 2000 |
| 6132555 |
Method and arrangement for increasing evaporation capacity of a multi-stage evaporator of spent liquor in a pulp mill |
Oct. 17, 2000 |
| 6110323 |
Methods of refining agricultural residues to absorbent cellulose, xylose, and plant nutrient liquor, and products produced by such methods |
Aug. 29, 2000 |
| 6024833 |
Process for removing metals and recovering a chelating agent from a bleach plant waste liquor |
Feb. 15, 2000 |
| 5989387 |
Method for controlling chloride concentration in the flue gas of a recovery boiler |
Nov. 23, 1999 |
| 5907066 |
Treating methanol-containing waste gas streams |
May. 25, 1999 |
| 5788812 |
Method of recovering furfural from organic pulping liquor |
Aug. 4, 1998 |
| 5730837 |
Method of separating lignocellulosic material into lignin, cellulose and dissolved sugars |
Mar. 24, 1998 |
| 5730877 |
Method for fractionating a solution |
Mar. 24, 1998 |
| 5730838 |
Process for extracting pure, coarse grain silicic acid crystals from spent lye |
Mar. 24, 1998 |
| 5707490 |
Method of recovering energy from waste liquors from pulp processes |
Jan. 13, 1998 |
| 5662774 |
Adjusting the sulphur balance of a sulphate cellulose plant by heat treating black liquor in a last evaporation stage |
Sep. 2, 1997 |
| 5660685 |
Gasifying black liquor with recycling of generated hydrogen sulphide gas to the gasifier |
Aug. 26, 1997 |
| 5637225 |
Method for fractionating sulphite cooking liquor |
Jun. 10, 1997 |
| 5635024 |
Process for separating lignins and dissolved organic compounds from kraft spent liquor |
Jun. 3, 1997 |
| 5628872 |
Method for bleaching pulp with hydrogen peroxide recovered from cellulosic spent liquor |
May. 13, 1997 |
| 5589030 |
Method for preparing vanillin from old newsprint |
Dec. 31, 1996 |
| 5562804 |
Method for adjusting the sulphur/sodium ratio in the flue gases of a soda recovery boiler |
Oct. 8, 1996 |
| 5518582 |
Method of affecting the sulphur content and/or sulphur compound composition of a melt in a recovery boiler |
May. 21, 1996 |
| 5509997 |
Method of recovering energy from waste liquors from pulp processes |
Apr. 23, 1996 |
| 5489363 |
Pulping with low dissolved solids for improved pulp strength |
Feb. 6, 1996 |
| 5480512 |
Method of controlling sulfidity of a sulfate pulp mill |
Jan. 2, 1996 |
| 5450892 |
Alkaline scrubber for condensate stripper off-gases |
Sep. 19, 1995 |
| 5424417 |
Prehydrolysis of lignocellulose |
Jun. 13, 1995 |
| 5374333 |
Method for minimizing pulp mill effluents |
Dec. 20, 1994 |
| 5326433 |
Multi-level sulfide content white liquor production and utilization in cellulose pulping |
Jul. 5, 1994 |
| 5277759 |
Method of controlling sulfidity of a sulfate cellulose mill |
Jan. 11, 1994 |
| 5198074 |
Process to produce a high quality paper product and an ethanol product from bamboo |
Mar. 30, 1993 |
| 5100511 |
Method for the manufacture of products containing fibers of lignocellulosic material |
Mar. 31, 1992 |
| 5096540 |
Method for recycling sulfur dioxide from sulfite pulping liquors |
Mar. 17, 1992 |
| 5061343 |
Recovery of NaOH and other values from spent liquors and bleach plant effluents |
Oct. 29, 1991 |
| 5049236 |
Lignin derived quinonic compound mixtures useful for the delignification of cellulosic materials |
Sep. 17, 1991 |
| 5034094 |
Method of converting inorganic materials from kraft pulping liquor into pulping chemicals without passing them through a recovery furnace |
Jul. 23, 1991 |
| 4988799 |
Lignosulfonate based pharmacologic agent with anti-coagulant and anti-thrombotic activity |
Jan. 29, 1991 |
| 4971657 |
Combined process for thermally and chemically treating lignocellulose-containing biomass and for producing furfural and cellulose-containing fiber masses |
Nov. 20, 1990 |
| 4966650 |
Method for fractionation of lignins from steam exploded lignocellulosics to provide fractions with different properties |
Oct. 30, 1990 |
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