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Class Information
Number: 162/67
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Gas, vapor or mist contact > Chlorine containing material > Chlorine dioxide
Description: Processes in which the gas or vapor is chlorine dioxide.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7368036 |
Xylanase treatment of chemical pulp |
May. 6, 2008 |
| 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 |
| 7014684 |
Method for the treatment of waste gas from a cellulose plant |
Mar. 21, 2006 |
| 7001483 |
Apparatus for making carboxylated pulp fibers |
Feb. 21, 2006 |
| 6787574 |
Emulsification of alkenyl succinic anhydride size |
Sep. 7, 2004 |
| 6752904 |
Process for removal of lignin from lignocellulosic material |
Jun. 22, 2004 |
| 6736934 |
Method of pretreating pulp in an acid tower prior to bleaching with peroxide |
May. 18, 2004 |
| 6569285 |
Process for gas phase pretreating of lignocellulosic containing material |
May. 27, 2003 |
| 6491788 |
Process for making lyocell fibers from alkaline pulp having low average degree of polymerization values |
Dec. 10, 2002 |
| 6398908 |
Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound |
Jun. 4, 2002 |
| 6322768 |
Recovery of chlorine dioxide from gas streams |
Nov. 27, 2001 |
| 6306253 |
Acid treatment of pulp at high temperature prior to chlorine dioxide bleaching |
Oct. 23, 2001 |
| 6258208 |
Method for complex treatment of pulp in conjunction with a chlorine dioxide stage |
Jul. 10, 2001 |
| 6136145 |
Method for treating pulp in an indirect heat exchanger in connection with bleaching |
Oct. 24, 2000 |
| 6042690 |
Method for the bleaching of pulp in a D2D sequence wherein the effluent contains reduced colored matter |
Mar. 28, 2000 |
| 5908532 |
Method of converting chlorine dioxide present in a gaseous stream from a pulp bleach plant by irradiation to chlorine |
Jun. 1, 1999 |
| 5900113 |
Method of using fluorescent tracers to monitor chlorine dioxide in pulp and paper processes |
May. 4, 1999 |
| 5474654 |
Process for gas phase delignifying wood pulp using chlorine dioxide at subatmospheric pressure |
Dec. 12, 1995 |
| 5091166 |
Process for the production of chlorine dioxide |
Feb. 25, 1992 |
| 5091167 |
Process for the production of chlorine dioxide |
Feb. 25, 1992 |
| 5030324 |
Sequential bleaching procedure using chlorine and chlorine dioxide in a first chlorination stage of a multistage bleaching process |
Jul. 9, 1991 |
| 4959124 |
Method of bleaching kraft pulp in a DZED sequence |
Sep. 25, 1990 |
| 4298426 |
Method and apparatus for treating pulp with oxygen in a multi-stage bleaching sequence |
Nov. 3, 1981 |
| 4274912 |
Process for bleaching preoxidized paper pulp |
Jun. 23, 1981 |
| 4244777 |
Bleaching stilbene yellow dyed wood pulp |
Jan. 13, 1981 |
| 4222818 |
Method for treatment of lignocellulosic material with chlorine |
Sep. 16, 1980 |
| 4128454 |
System and method for gas phase pulp bleaching |
Dec. 5, 1978 |
| 4093506 |
Method and apparatus for effecting even distribution and mixing of high consistency pulp and treatment fluid |
Jun. 6, 1978 |
| 4070233 |
Process of the pulping of bleaching of vegetable material |
Jan. 24, 1978 |
| RE28887 |
Sequential bleaching of kraft pulp with chlorine dioxide followed by chlorine |
Jun. 29, 1976 |
| RE28884 |
Woodpulp bleaching process |
Jun. 29, 1976 |
| RE28777 |
Refining of vegetable matter and delignification of the refined matter with chlorine dioxide |
Apr. 20, 1976 |
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