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Class Information
Number: 162/60
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > With washing
Description: Processes combined with a step of passing a nonreactive liquid through the fibrous material so as to remove undesired material therefrom.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7575658 |
Vacuum washer drum |
Aug. 18, 2009 |
| 7537674 |
Closed floatation de-inking module for recycled paper |
May. 26, 2009 |
| 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 |
| 7384502 |
Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness |
Jun. 10, 2008 |
| 7374637 |
Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate |
May. 20, 2008 |
| 7351305 |
Method and a digester for the continuous cooking of wood raw material to cellulose pulp |
Apr. 1, 2008 |
| 7347916 |
Vacuum washer drum |
Mar. 25, 2008 |
| 7297225 |
Process for high temperature peroxide bleaching of pulp with cool discharge |
Nov. 20, 2007 |
| 7282115 |
Method for mitigating the interference caused by high-molecular weight-by-products in pulping processes |
Oct. 16, 2007 |
| 7252739 |
Method for distributing cellulose pulp of low and medium consistency in order to form a uniform pulp web |
Aug. 7, 2007 |
| 7226525 |
Process for producing very low COD unbleached pulp |
Jun. 5, 2007 |
| 7214291 |
Method for the modification of cellulose fibres |
May. 8, 2007 |
| 7198695 |
Method for separating hemicelluloses from a biomass containing hemicelluloses and biomass and hemicelluloses obtained by said method |
Apr. 3, 2007 |
| 7156952 |
Method and arrangement for oxygen delignification of cellulose pulp |
Jan. 2, 2007 |
| 7081184 |
Process for making a very low COD unbleached pulp |
Jul. 25, 2006 |
| 7077931 |
Method and bleaching line with a main conduit for wash liquor |
Jul. 18, 2006 |
| 7044307 |
Drum type paper stock fine screen |
May. 16, 2006 |
| 7018510 |
Process for bio-bleaching of Kraft pulp using bacterial consortia |
Mar. 28, 2006 |
| 7018509 |
Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing |
Mar. 28, 2006 |
| 6986828 |
Process for producing low DP microcrystalline cellulose |
Jan. 17, 2006 |
| 6966970 |
Method for supplying washing liquid to a process for cooking cellulose pulp |
Nov. 22, 2005 |
| 6946072 |
Method and apparatus for washing a fibre suspension |
Sep. 20, 2005 |
| 6896810 |
Process for producing alkaline treated cellulosic fibers |
May. 24, 2005 |
| 6868973 |
Drum type refining or washing apparatus |
Mar. 22, 2005 |
| 6773546 |
Black liquor removed from pulp |
Aug. 10, 2004 |
| 6746568 |
Treatment of filtrates from peroxide bleaching of pulp |
Jun. 8, 2004 |
| 6736934 |
Method of pretreating pulp in an acid tower prior to bleaching with peroxide |
May. 18, 2004 |
| 6733625 |
Method and apparatus for treating pulp |
May. 11, 2004 |
| 6719878 |
Method for avoiding mechanical damage of pulp |
Apr. 13, 2004 |
| 6620292 |
Cellulose production from lignocellulosic biomass |
Sep. 16, 2003 |
| 6558557 |
Process and a decker for bringing together two suspension layers |
May. 6, 2003 |
| 6553593 |
Plate diffuser for treating comminuted cellulosic fibrous material |
Apr. 29, 2003 |
| 6533896 |
Method for the production of precleaned pulp |
Mar. 18, 2003 |
| 6514380 |
Treatment of chemical pulp |
Feb. 4, 2003 |
| 6502434 |
Effluent shower for pulp washer |
Jan. 7, 2003 |
| 6461473 |
Supply of washing liquid in a fractionating multi-stage washer |
Oct. 8, 2002 |
| 6440265 |
FRP hood for paper processing plant |
Aug. 27, 2002 |
| 6425973 |
Treatment of solid containing material derived from effluent |
Jul. 30, 2002 |
| 6419788 |
Method of treating lignocellulosic biomass to produce cellulose |
Jul. 16, 2002 |
| 6413366 |
Method and device for flotation of pollutants from an aqueous fibrous material suspension |
Jul. 2, 2002 |
| 6395132 |
Washing system and washer for a fiber suspension |
May. 28, 2002 |
| 6387210 |
Method of making sanitary paper product from coarse fibers |
May. 14, 2002 |
| 6372086 |
Pulper and countercurrent washer sugar cane extraction |
Apr. 16, 2002 |
| 6302996 |
Method and apparatus for washing fiber pulp mixture |
Oct. 16, 2001 |
| 6272710 |
Plate diffuser for treating comminuted cellulosic fibrous material |
Aug. 14, 2001 |
| 6245196 |
Method and apparatus for pulp yield enhancement |
Jun. 12, 2001 |
| 6228215 |
Method for countercurrent treatment of slurries |
May. 8, 2001 |
| 6228212 |
Method of removing wax from cellulosic fiber used in a fiber suspension for a paper-making machine |
May. 8, 2001 |
| 6162325 |
Process for treating paper pulp |
Dec. 19, 2000 |
| 6159338 |
Supply of washing liquid in a fractionating multi-stage washer |
Dec. 12, 2000 |
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