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Class Information
Number: 162/63
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Gas, vapor or mist contact
Description: Processes wherein the fibrous material is forcibly and directly contacted with a gas, vapor or mist during digestion or chemical treatment for some purpose other than drying.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7520958 |
Modified kraft fibers |
Apr. 21, 2009 |
| 7334347 |
Process for producing dried, singulated fibers using steam and heated air |
Feb. 26, 2008 |
| 7070677 |
Method and apparatus for treating pulp with filler |
Jul. 4, 2006 |
| 6991705 |
Process for stabilizing the PH of a pulp suspension and for producing paper from the stabilized pulp |
Jan. 31, 2006 |
| 6841042 |
Feeding comminuted fibrous material using high pressure screw and centrifugal pumps |
Jan. 11, 2005 |
| 6797125 |
Method of treating condensates |
Sep. 28, 2004 |
| 6769199 |
Process for producing dried singulated cellulose pulp fibers using a jet drier and injected steam and the product resulting therefrom |
Aug. 3, 2004 |
| 6752904 |
Process for removal of lignin from lignocellulosic material |
Jun. 22, 2004 |
| 6679972 |
Process for the bleaching of a pulp suspension by separating calcium from lignin |
Jan. 20, 2004 |
| 6623600 |
Method of performing an impregnating or extracting treatment on a resin-containing wood substrate |
Sep. 23, 2003 |
| 6589387 |
Process for improving the drainage of cellulosic pulps by adding carbon dioxide directly into the pulp |
Jul. 8, 2003 |
| 6572734 |
Method for treatment of loose material |
Jun. 3, 2003 |
| 6569285 |
Process for gas phase pretreating of lignocellulosic containing material |
May. 27, 2003 |
| 6464827 |
Method of digesting wood with an alkaline liquor by adding an acidic agent to precipitate dissociated lignin |
Oct. 15, 2002 |
| 6419788 |
Method of treating lignocellulosic biomass to produce cellulose |
Jul. 16, 2002 |
| 6379495 |
Process for the production of cellulose paper pulps by biodelignification of vegetative masses |
Apr. 30, 2002 |
| 6350348 |
Batch cooking with black liquor pretreatment |
Feb. 26, 2002 |
| 6245196 |
Method and apparatus for pulp yield enhancement |
Jun. 12, 2001 |
| 6241852 |
Method and device for mixing of a fluid into a pulp-suspension at the lowest pressure of the suspension |
Jun. 5, 2001 |
| 6200417 |
Process and device for mixing stock suspensions |
Mar. 13, 2001 |
| 6174411 |
Continuous digester with inverted top separator |
Jan. 16, 2001 |
| 6086714 |
Process for adjusting the alkalinity of pulp slurry in a broke pulper using carbon dioxide |
Jul. 11, 2000 |
| 6059844 |
Cleaning process |
May. 9, 2000 |
| 5882427 |
Method of reconditioning used wood |
Mar. 16, 1999 |
| 5882477 |
Continuous digester with a low temperature gas-phase |
Mar. 16, 1999 |
| 5858170 |
Method for pressurized peroxide bleaching |
Jan. 12, 1999 |
| 5783037 |
System and method for operating a pulp mill |
Jul. 21, 1998 |
| 5772844 |
Process distributing fluffed pulp into a static bed reactor for gaseous treatment |
Jun. 30, 1998 |
| 5536368 |
Method and apparatus for mixing a first medium to a second medium and a bleaching process applying said method |
Jul. 16, 1996 |
| 5429717 |
Method of washing of alkaline pulp by adding carbon dioxide to the pulp |
Jul. 4, 1995 |
| 5401362 |
Control of metals and dissolved organics in the bleach plant |
Mar. 28, 1995 |
| 5364475 |
Process for removing chemical preservatives from wood using supercritical fluid extraction |
Nov. 15, 1994 |
| 5282932 |
Process for pH and fire control in pulp balers |
Feb. 1, 1994 |
| 5240621 |
Method and apparatus for improving flotation separation |
Aug. 31, 1993 |
| 5219472 |
Method of treating a fiber suspension |
Jun. 15, 1993 |
| 5213660 |
Secondary fiber cellulose product with reduced levels of polychlorinated dibenzodioxins and polychlorinated dibenzofurans |
May. 25, 1993 |
| 5179021 |
Pulp bleaching process comprising oxygen delignification and xylanase enzyme treatment |
Jan. 12, 1993 |
| 5139613 |
Process for preparing a paper pulp using carbon dioxide as an acidifying agent for a bleached pulp |
Aug. 18, 1992 |
| 5122228 |
Method of treatment of waste paper with steam |
Jun. 16, 1992 |
| 5074958 |
Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans and stickies from secondary fibers using supercritical propane solvent extraction |
Dec. 24, 1991 |
| 5041192 |
Supercritical delignification of wood |
Aug. 20, 1991 |
| 5035772 |
Method for treating bleached lignin containing cellulose pulp by reducing .alpha.-carbonyl and .gamma.-carbonyl groups and converting short-wave quanta to long-wave light quanta |
Jul. 30, 1991 |
| 5009746 |
Method for removing stickies from secondary fibers using supercritical CO.sub.2 solvent extraction |
Apr. 23, 1991 |
| 5009745 |
Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans from secondary fibers using supercritical CO.sub.2 extraction |
Apr. 23, 1991 |
| 4995943 |
Pretreatment of cellulosic material with carbon dioxide |
Feb. 26, 1991 |
| 4992308 |
Supercritical fluid-aided treatment of porous materials |
Feb. 12, 1991 |
| 4946555 |
Apparatus and method for measuring vent gas flow rates and parameters in pulp and paper processing |
Aug. 7, 1990 |
| 4872953 |
Apparatus for improving the quality of paper manufactured from recycled paper with a hydrokinetic amplifier |
Oct. 10, 1989 |
| 4853082 |
Process for the activation and delignification of cellulose pulp |
Aug. 1, 1989 |
| 4726880 |
Method and apparatus for improving the quality of paper manufactured from recycled paper with a hydrokinetic amplifier |
Feb. 23, 1988 |
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