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Class Information
Number: 162/90
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Treatment with particular chemical > Alkali metal, ammonium, alkaline earth metal or magnesium hydroxide or carbonate
Description: Processes in which a hydroxide or carbonate of an alkali metal, ammonium, an alkaline earth metal or magnesium is employed.
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 |
| 7390378 |
Method of curling fiber and absorbent sheet containing same |
Jun. 24, 2008 |
| 7384502 |
Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness |
Jun. 10, 2008 |
| 7364640 |
Chemimechanical desilication of nonwood plant materials |
Apr. 29, 2008 |
| 7294227 |
Method and system for the treatment of pulp prior to ozone bleaching |
Nov. 13, 2007 |
| 7285184 |
Cellulosic fiber pulp and highly porous paper products produced therefrom |
Oct. 23, 2007 |
| 7226525 |
Process for producing very low COD unbleached pulp |
Jun. 5, 2007 |
| 7195695 |
Cross-linked cellulose fibers and method of making same |
Mar. 27, 2007 |
| 7189306 |
Process of treating lignocellulosic material to produce bio-ethanol |
Mar. 13, 2007 |
| 7186316 |
Method for preparing pulp from cornstalk |
Mar. 6, 2007 |
| 7182836 |
Method for delignifying lignocellulosic raw materials |
Feb. 27, 2007 |
| 7156952 |
Method and arrangement for oxygen delignification of cellulose pulp |
Jan. 2, 2007 |
| 7094317 |
Process of manufacturing and using highly refined fiber mass |
Aug. 22, 2006 |
| 7090744 |
Process for making composition for conversion to lyocell fiber from sawdust |
Aug. 15, 2006 |
| 7083704 |
Process for making a composition for conversion to lyocell fiber from an alkaline pulp having low average degree of polymerization values |
Aug. 1, 2006 |
| 7081183 |
Method of deresinating pulp using alkyl alcohol alkoxylate surfactants |
Jul. 25, 2006 |
| 7081184 |
Process for making a very low COD unbleached pulp |
Jul. 25, 2006 |
| 7074300 |
Cellulose fiber-based compositions and their method of manufacture |
Jul. 11, 2006 |
| 7052578 |
Process employing magnesium hydroxide in peroxide bleaching of mechanical pulp |
May. 30, 2006 |
| 7029554 |
Method for brightening pulp with hydrosulfite solution generated from borohydride and bisulfite |
Apr. 18, 2006 |
| 6991705 |
Process for stabilizing the PH of a pulp suspension and for producing paper from the stabilized pulp |
Jan. 31, 2006 |
| 6946057 |
Alkaline process for the manufacturing of pulp using alkali metaborate as buffering alkali |
Sep. 20, 2005 |
| 6923887 |
Method for hydrogen peroxide bleaching of pulp using an organic solvent in the bleaching medium |
Aug. 2, 2005 |
| 6923888 |
Process for recovering organic acids from bleaching liquors |
Aug. 2, 2005 |
| 6913672 |
Methods for analyzing boron-containing alkaline pulping liquors |
Jul. 5, 2005 |
| 6899790 |
Method of providing papermaking fibers with durable curl |
May. 31, 2005 |
| 6881299 |
Refiner bleaching with magnesium oxide and hydrogen peroxide |
Apr. 19, 2005 |
| 6861023 |
Process for making lyocell fiber from sawdust pulp |
Mar. 1, 2005 |
| 6814759 |
Stable zeolite/cellulose composite materials and method of preparation |
Nov. 9, 2004 |
| 6797113 |
Use of thinnings and other low specific gravity wood for lyocell pulps method |
Sep. 28, 2004 |
| 6777103 |
Fiber cement composite material using biocide treated durable cellulose fibers |
Aug. 17, 2004 |
| 6770168 |
Process for oxygen pulping of lignocellulosic material and recorvery of pulping chemicals |
Aug. 3, 2004 |
| 6752902 |
Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp |
Jun. 22, 2004 |
| 6743332 |
High temperature peroxide bleaching of mechanical pulps |
Jun. 1, 2004 |
| 6740199 |
Process for digesting woodchips with a sultaine and a polyglycoside |
May. 25, 2004 |
| 6719878 |
Method for avoiding mechanical damage of pulp |
Apr. 13, 2004 |
| 6716310 |
Process for manufacturing a cellulosic paper product exhibiting reduced malodor |
Apr. 6, 2004 |
| 6699358 |
Method for brightening chemical pulp with hydrogen peroxide using a magnesium compound in silicate solution |
Mar. 2, 2004 |
| 6679972 |
Process for the bleaching of a pulp suspension by separating calcium from lignin |
Jan. 20, 2004 |
| 6663749 |
Method for regenerating sodium hydroxide by partial autocausticizing sodium carbonate containing smelt by reaction with borate |
Dec. 16, 2003 |
| 6649023 |
Process for digesting woodchips and digester additives |
Nov. 18, 2003 |
| 6641699 |
Chemical wood pulping process with reduced pitch and VOC emissions |
Nov. 4, 2003 |
| 6635147 |
Method for analyzing boron-containing alkaline pulping liquors |
Oct. 21, 2003 |
| 6632328 |
Method for bleaching mechanical pulp with hydrogen peroxide and an alkaline earth metal carbonate |
Oct. 14, 2003 |
| 6627041 |
Method of bleaching and providing papermaking fibers with durable curl |
Sep. 30, 2003 |
| 6576084 |
Method of pretreating pulp with yield or strength-enhancing additive |
Jun. 10, 2003 |
| 6551452 |
Process for digesting woodchips and digester additives |
Apr. 22, 2003 |
| 6548427 |
Sanitary tissue products with improved flushability |
Apr. 15, 2003 |
| 6533896 |
Method for the production of precleaned pulp |
Mar. 18, 2003 |
| 6524437 |
Process for peroxide bleaching wherein the concentrations of Mn and Fe are monitored and maintained |
Feb. 25, 2003 |
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