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Class Information
Number: 162/68
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Gas, vapor or mist contact > Steam only
Description: Processes in which steam is the only gas or vapor coming into direct contact with the fibrous material.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7615134 |
Method and arrangement of impregnating chips |
Nov. 10, 2009 |
| 7520958 |
Modified kraft fibers |
Apr. 21, 2009 |
| 7501043 |
Steam treatment of chips with the addition of an acid liquid |
Mar. 10, 2009 |
| 7390378 |
Method of curling fiber and absorbent sheet containing same |
Jun. 24, 2008 |
| 7306698 |
Method for producing pulp |
Dec. 11, 2007 |
| 7303707 |
Processing of ligno-cellulose materials |
Dec. 4, 2007 |
| 7300540 |
Energy efficient TMP refining of destructured chips |
Nov. 27, 2007 |
| 7300550 |
High intensity refiner plate with inner fiberizing zone |
Nov. 27, 2007 |
| 7300541 |
High defiberization chip pretreatment |
Nov. 27, 2007 |
| 7297225 |
Process for high temperature peroxide bleaching of pulp with cool discharge |
Nov. 20, 2007 |
| 7279070 |
Method for the continuous cooking of wood raw material for cellulose pulp |
Oct. 9, 2007 |
| 7270725 |
Pretreatment of chips with white liquor prior to a treatment with black liquor |
Sep. 18, 2007 |
| 7229526 |
Method and apparatus for the feeding of fibers |
Jun. 12, 2007 |
| 7229524 |
Feeding arrangement for feeding of chips to chip bins |
Jun. 12, 2007 |
| 7189306 |
Process of treating lignocellulosic material to produce bio-ethanol |
Mar. 13, 2007 |
| 7097737 |
Method of making a modified unbleached pulp for lyocell products |
Aug. 29, 2006 |
| 7064113 |
Resin composition, method of molding the same, and method of recycling resin composition |
Jun. 20, 2006 |
| 6921820 |
Method for forming cellulose |
Jul. 26, 2005 |
| 6914139 |
Solution of cellulose acylate dissolved in mixed solvent of ketone and ester |
Jul. 5, 2005 |
| 6899791 |
Method of pretreating lignocellulose fiber-containing material in a pulp refining process |
May. 31, 2005 |
| 6843885 |
Method for controlling the cooking temperature in a continuous vapour phase digester |
Jan. 18, 2005 |
| 6841042 |
Feeding comminuted fibrous material using high pressure screw and centrifugal pumps |
Jan. 11, 2005 |
| 6770168 |
Process for oxygen pulping of lignocellulosic material and recorvery of pulping chemicals |
Aug. 3, 2004 |
| 6572734 |
Method for treatment of loose material |
Jun. 3, 2003 |
| 6533896 |
Method for the production of precleaned pulp |
Mar. 18, 2003 |
| 6506282 |
Steam explosion treatment with addition of chemicals |
Jan. 14, 2003 |
| 6497791 |
Apparatus for pre-treatment of wood chips |
Dec. 24, 2002 |
| 6491787 |
Method for heating pulps |
Dec. 10, 2002 |
| 6475338 |
Method of minimizing transition metal ions during chemical pulping in a digester by adding chelating agent to the digester |
Nov. 5, 2002 |
| 6447639 |
Process for controlling a digester using real time measurement of moisture content and species of wood |
Sep. 10, 2002 |
| 6436233 |
Feeding cellulose material to a treatment vessel |
Aug. 20, 2002 |
| 6419786 |
Method for bleaching wood pulp containing recycled paper |
Jul. 16, 2002 |
| 6413367 |
Treatment of cellulosic material with a chelating agent prior to alkaline delignification |
Jul. 2, 2002 |
| 6413362 |
Method of steam treating low yield papermaking fibers to produce a permanent curl |
Jul. 2, 2002 |
| 6383342 |
Cluster rule compliance with reduced steam consumption |
May. 7, 2002 |
| 6325888 |
Method for pulping sawdust |
Dec. 4, 2001 |
| 6306248 |
Method for transforming diverse pulp and paper products into a homogenous cellulosic feedstock |
Oct. 23, 2001 |
| 6280567 |
System and method for treatment of cellulose-containing material prior to pulp digestion |
Aug. 28, 2001 |
| 6248208 |
Pretreatment of chips before cooking |
Jun. 19, 2001 |
| 6221208 |
Method for heating and pressuring a fibre pulp suspension during transportation to a bleaching reactor |
Apr. 24, 2001 |
| 6221207 |
Oxygen delignification of pulp in two stages with low pressure steam heating between stages |
Apr. 24, 2001 |
| 6217711 |
Method of treating condensates |
Apr. 17, 2001 |
| 6174411 |
Continuous digester with inverted top separator |
Jan. 16, 2001 |
| 6165317 |
Control of refined pulp quality by adjusting high temperature pre-heat residence time |
Dec. 26, 2000 |
| 6153052 |
Pulping process |
Nov. 28, 2000 |
| 6136145 |
Method for treating pulp in an indirect heat exchanger in connection with bleaching |
Oct. 24, 2000 |
| 5925218 |
Rehydration of once-dried fiber |
Jul. 20, 1999 |
| 5865948 |
Method for steaming comminuted cellulosic fibrous material during continuous solvent pulping |
Feb. 2, 1999 |
| 5830314 |
Cleaning condensates from multi-effect evaporator of cellulose pulp waste liquors |
Nov. 3, 1998 |
| 5776305 |
Low-resident, high-temperature, high-speed chip refining |
Jul. 7, 1998 |
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