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Class Information
Number: 162/43
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > With regeneration, reclamation, reuse, recycling or destruction of digestion fluid > Recirculation (includes separation from fibers) > With treatment of fluids during recirculation > Removal and/or separation of portion of recirculating fluid
Description: Processes in which a portion of the fiber treating fluid is removed from the recirculating stream thereof.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7604711 |
Method to optimize temperature profiles displacement batch cooking |
Oct. 20, 2009 |
| 7374637 |
Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate |
May. 20, 2008 |
| 7364640 |
Chemimechanical desilication of nonwood plant materials |
Apr. 29, 2008 |
| 7297225 |
Process for high temperature peroxide bleaching of pulp with cool discharge |
Nov. 20, 2007 |
| 7217338 |
Process for continuously cooking chemical cellulose pulp |
May. 15, 2007 |
| 6942754 |
Process for producing xylooligosaccharide from lignocellulose pulp |
Sep. 13, 2005 |
| 6866748 |
Process for preparing polysulfides using clarified white liquor |
Mar. 15, 2005 |
| 6824646 |
Process for oxygen bleaching and enzyme treating lignocellulosic pulp with liquid treatment and recovery |
Nov. 30, 2004 |
| 6746568 |
Treatment of filtrates from peroxide bleaching of pulp |
Jun. 8, 2004 |
| 6723205 |
Degassing centrifugal apparatus with energy recovery, process for degassing a fluid and process for producing paper or board |
Apr. 20, 2004 |
| 6715307 |
Air conditioner for vehicle |
Apr. 6, 2004 |
| 6544384 |
Pretreatment of chips before cooking |
Apr. 8, 2003 |
| 6461473 |
Supply of washing liquid in a fractionating multi-stage washer |
Oct. 8, 2002 |
| 6451172 |
In-line drainer enhancements |
Sep. 17, 2002 |
| 6350348 |
Batch cooking with black liquor pretreatment |
Feb. 26, 2002 |
| 6346167 |
Dissolved solids control in pulp production |
Feb. 12, 2002 |
| 6332950 |
Method in connection with the pretreatment of comminuted fibrous material |
Dec. 25, 2001 |
| 6280568 |
Dissolved organic material control in a cellulose pulp continuous digester |
Aug. 28, 2001 |
| 6254723 |
Method for continuous cooking in a single-vessel digester |
Jul. 3, 2001 |
| 6235151 |
Inhibiting scaling in alkaline waste liquor evaporators |
May. 22, 2001 |
| 6159337 |
Dissolved organic materials control in cellulose pulp production |
Dec. 12, 2000 |
| 6132556 |
Method of controlling pulp digester pressure via liquor extraction |
Oct. 17, 2000 |
| 6086712 |
DOM control in cellulose pulp production |
Jul. 11, 2000 |
| 6071375 |
Gas purge protection of sensors and windows in a gas phase processing reactor |
Jun. 6, 2000 |
| 5849150 |
Low dissolved solids control in pulp production |
Dec. 15, 1998 |
| 5849151 |
Continuous digester having means for implementing low dissolved solids profiling |
Dec. 15, 1998 |
| 5788813 |
Clarifying and/or filtering of green liquor and an apparatus therefore |
Aug. 4, 1998 |
| 5741399 |
Pulp washing method |
Apr. 21, 1998 |
| 5716496 |
Method and apparatus for treatment of black liquor |
Feb. 10, 1998 |
| 5679217 |
Method and apparatus for optimizing the liquor-to-wood ratio during the production of paper pulp |
Oct. 21, 1997 |
| 5674359 |
Continuous cooking of cellulosic fibrous material with cold alkali impregnation |
Oct. 7, 1997 |
| 5620562 |
Dissolved solids control in pulp production |
Apr. 15, 1997 |
| 5582683 |
Method for the recovery of chemical values from black liquor in multiple streams of different chemical values |
Dec. 10, 1996 |
| 5575890 |
Method for selectively increasing the sulfide ion concentration and sulfidity of kraft cooking liquor during kraft cooking of wood |
Nov. 19, 1996 |
| 5547012 |
Dissolved solids control in pulp production |
Aug. 20, 1996 |
| 5536366 |
Digester system for implementing low dissolved solids profiling |
Jul. 16, 1996 |
| 5510035 |
Method of separating sodium hydroxide from white liquor |
Apr. 23, 1996 |
| 5489363 |
Pulping with low dissolved solids for improved pulp strength |
Feb. 6, 1996 |
| 5360514 |
Treatment of bleach plant filtrations using a magnesium filter |
Nov. 1, 1994 |
| 5213663 |
Method for controlling the sodium carbonate concentration of green liquor in the dissolving tank |
May. 25, 1993 |
| 5145556 |
Single-stage slaking and causticizing method |
Sep. 8, 1992 |
| 4853082 |
Process for the activation and delignification of cellulose pulp |
Aug. 1, 1989 |
| 4717450 |
Removal of chloride from process solutions |
Jan. 5, 1988 |
| 4681935 |
Procedure for recovering soluble carbohydrates contained in wood |
Jul. 21, 1987 |
| 4608121 |
Process for continuous digestion of finely-divided material with heat capacity flows of substantially the same magnitude |
Aug. 26, 1986 |
| 4581104 |
Method of reducing the lignin in wood pulp with oxygen gas recirculation |
Apr. 8, 1986 |
| 4141787 |
Process for preparing chemical cellulose according to the sulfite process by increasing the total SO.sub.2 content of cooking acid with liquid SO.sub.2 and digesting wood chips |
Feb. 27, 1979 |
| 4135967 |
Process for producing cellulose pulp by solid phase digestion |
Jan. 23, 1979 |
| 4104113 |
Two-stage digestion with between vessel heating |
Aug. 1, 1978 |
| 3964962 |
Gaseous reaction apparatus and processes including a peripheral gas receiving chamber and a gas recirculation conduit |
Jun. 22, 1976 |
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