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Class Information
Number: 162/78
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Treatment with particular chemical > Per-compound (e.g., peroxide, perborate)
Description: Processes in which a so- called inorganic "per" compound is employed.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7608167 |
Crosslinked carboxyalkyl cellulose fibers having permanent and non-permanent crosslinks |
Oct. 27, 2009 |
| 7604714 |
Methods for the preparation of crosslinked carboxyalkyl cellulose fibers having permanent and non-permanent crosslinks |
Oct. 20, 2009 |
| 7585387 |
Chemical oxidation for cellulose separation with a hypochlorite and peroxide mixture |
Sep. 8, 2009 |
| 7541175 |
Alkaline extraction stages comprising xylanase |
Jun. 2, 2009 |
| 7520958 |
Modified kraft fibers |
Apr. 21, 2009 |
| 7513973 |
Bleached polyacrylic acid crosslinked cellulosic fibers |
Apr. 7, 2009 |
| 7481905 |
Process for manufacturing board |
Jan. 27, 2009 |
| 7419568 |
Chemically cross-linked cellulosic fiber and method of making same |
Sep. 2, 2008 |
| 7402224 |
Method for producing paper pulp, lignins, sugars and acetic acid by frantionation of lignocellulosic vegetable material in formic/acetic acid medium |
Jul. 22, 2008 |
| 7390378 |
Method of curling fiber and absorbent sheet containing same |
Jun. 24, 2008 |
| 7368036 |
Xylanase treatment of chemical pulp |
May. 6, 2008 |
| 7326317 |
Lignocellulose product |
Feb. 5, 2008 |
| 7320740 |
Chemically cross-linked cellulosic fiber and method of making same |
Jan. 22, 2008 |
| 7320741 |
Method of xylanase treatment in a chlorine dioxide bleaching sequence |
Jan. 22, 2008 |
| 7297225 |
Process for high temperature peroxide bleaching of pulp with cool discharge |
Nov. 20, 2007 |
| 7291247 |
Absorbent sheet made with papermaking fibers with durable curl |
Nov. 6, 2007 |
| 7285181 |
Bleaching and brightness stabilization of lignocellulosic materials with water-soluble phosphines or phosphonium compounds |
Oct. 23, 2007 |
| 7267744 |
Pulp treatment and process |
Sep. 11, 2007 |
| 7214291 |
Method for the modification of cellulose fibres |
May. 8, 2007 |
| 7214292 |
Addition of THP or THP+ salt to pulping liquors to destroy catalase and/or catalase producing bacteria |
May. 8, 2007 |
| 7189329 |
Control of development of biofilms in industrial process water |
Mar. 13, 2007 |
| 7189306 |
Process of treating lignocellulosic material to produce bio-ethanol |
Mar. 13, 2007 |
| 7182835 |
Two-stage chlorine bleaching process with filtrate recirculation |
Feb. 27, 2007 |
| 7138035 |
Process for the selective modification of carbohydrates by peroxidase catalyzed oxidation |
Nov. 21, 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 |
| 7052578 |
Process employing magnesium hydroxide in peroxide bleaching of mechanical pulp |
May. 30, 2006 |
| 7005034 |
Method in connection with the production of mechanical pulp |
Feb. 28, 2006 |
| 7001484 |
Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent |
Feb. 21, 2006 |
| 6958108 |
Method of producing a fiber product having a strength suitable for printing paper and packaging material |
Oct. 25, 2005 |
| 6923887 |
Method for hydrogen peroxide bleaching of pulp using an organic solvent in the bleaching medium |
Aug. 2, 2005 |
| 6902649 |
Enhanced fiber additive; and use |
Jun. 7, 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 |
| 6866749 |
Method for bleaching paper pulp with organic peracids followed by peroxide and sodium hydroxide |
Mar. 15, 2005 |
| 6776876 |
Method of treating cellulosic pulp to remove hexenuronic acid |
Aug. 17, 2004 |
| 6746568 |
Treatment of filtrates from peroxide bleaching of pulp |
Jun. 8, 2004 |
| 6743332 |
High temperature peroxide bleaching of mechanical pulps |
Jun. 1, 2004 |
| 6736934 |
Method of pretreating pulp in an acid tower prior to bleaching with peroxide |
May. 18, 2004 |
| 6706143 |
Minimizing chlorinated organics in pulp bleaching processes |
Mar. 16, 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 |
| 6660128 |
Oxidase process for pulp |
Dec. 9, 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 |
| 6605181 |
Peroxide bleach sequence including an acidic bleach stage and including a wash stage |
Aug. 12, 2003 |
| 6605182 |
Polymers, their preparation and their use |
Aug. 12, 2003 |
| 6602385 |
Method of improving the brightness of calcium carbonate filled paper |
Aug. 5, 2003 |
| 6569284 |
Elemental-chlorine-free bleaching process having an initial Eo or Eop stage |
May. 27, 2003 |
| 6569286 |
Method for the alkaline bleaching of pulp with a peroxyacid based oxygen bleaching species using an agglomerated bleach activator |
May. 27, 2003 |
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