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Class Information
Number: 162/29
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
Description: Processes involving (1) the regeneration, reclamation, reuse or recycling (to a fiber treating zone), or (2) the destruction of the digestion or treating fluid or chemicals after being used at least once for treating a fibrous material.
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 |
| 7575657 |
Method and apparatus for reducing the amount of sludge produced in a pulp and/or paper mill |
Aug. 18, 2009 |
| 7560059 |
Process and method for recycling cigarette butts |
Jul. 14, 2009 |
| 7553394 |
Method for removing potassium from ash produced in a kraft pulping process recovery boiler using a Na-type cation exchange organic resin |
Jun. 30, 2009 |
| 7547374 |
Method for impregnating chips in a continuous digestion system |
Jun. 16, 2009 |
| 7540937 |
Method for continuous cooking |
Jun. 2, 2009 |
| 7396434 |
Catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein |
Jul. 8, 2008 |
| 7384501 |
Method for improved turpentine recovery from modern cooking plants |
Jun. 10, 2008 |
| 7374637 |
Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate |
May. 20, 2008 |
| 7371307 |
Kraft pulp yield by heat treatment of polysulphide liquors generated by oxidation |
May. 13, 2008 |
| 7300542 |
Method for inhibiting calcium salt scale |
Nov. 27, 2007 |
| 7300539 |
Treatment of solid containing material derived from effluent |
Nov. 27, 2007 |
| 7294225 |
Process for production of synthesis gas in combination with the maintenance of the energy balance for a pulp mill |
Nov. 13, 2007 |
| 7291245 |
Process for causticizing green liquor in chemical recovery from black liquor in alkaline pulping |
Nov. 6, 2007 |
| 7270726 |
Method for the production of green liquor |
Sep. 18, 2007 |
| 7270725 |
Pretreatment of chips with white liquor prior to a treatment with black liquor |
Sep. 18, 2007 |
| 7241363 |
Methods to decrease scaling in digester systems |
Jul. 10, 2007 |
| 7214291 |
Method for the modification of cellulose fibres |
May. 8, 2007 |
| 7182835 |
Two-stage chlorine bleaching process with filtrate recirculation |
Feb. 27, 2007 |
| 7179437 |
Feeding device and process and feeding system which utilize the feeding device |
Feb. 20, 2007 |
| 7172677 |
Method for inhibiting calcium salt scale |
Feb. 6, 2007 |
| 7169263 |
Coarse dirt collector for removing coarse material from a pulper and corresponding method |
Jan. 30, 2007 |
| 7060162 |
Chip bin |
Jun. 13, 2006 |
| 7029553 |
Urea sulfate and urea hydrochloride in paper and pulp processing |
Apr. 18, 2006 |
| 7014684 |
Method for the treatment of waste gas from a cellulose plant |
Mar. 21, 2006 |
| 6986828 |
Process for producing low DP microcrystalline cellulose |
Jan. 17, 2006 |
| 6896810 |
Process for producing alkaline treated cellulosic fibers |
May. 24, 2005 |
| 6890404 |
Composition for the production of improved pulp |
May. 10, 2005 |
| 6869503 |
Composition for inhibiting calcium salt scale |
Mar. 22, 2005 |
| 6843885 |
Method for controlling the cooking temperature in a continuous vapour phase digester |
Jan. 18, 2005 |
| 6830615 |
High surface area incineration product |
Dec. 14, 2004 |
| 6821384 |
Process for the treatment of fly ash, using hydrochloric acid |
Nov. 23, 2004 |
| 6773546 |
Black liquor removed from pulp |
Aug. 10, 2004 |
| 6752903 |
Method for mitigating the interference caused by high-molecular weight by-products in pulping processes |
Jun. 22, 2004 |
| 6719879 |
Method for kraft waste reclamation |
Apr. 13, 2004 |
| 6699357 |
Process for continuous cooking of pulp |
Mar. 2, 2004 |
| 6691358 |
Oxidized white liquor in an oxygen delignification process |
Feb. 17, 2004 |
| 6663749 |
Method for regenerating sodium hydroxide by partial autocausticizing sodium carbonate containing smelt by reaction with borate |
Dec. 16, 2003 |
| 6641699 |
Chemical wood pulping process with reduced pitch and VOC emissions |
Nov. 4, 2003 |
| 6632327 |
Process for treating spent, waste, alkaline digestion liquor from paper pulping operations and product |
Oct. 14, 2003 |
| 6627784 |
Highly efficient method of mixing dissimilar fluids using mechanically induced cavitation |
Sep. 30, 2003 |
| 6605180 |
Process for continuous cooking of pulp |
Aug. 12, 2003 |
| 6569284 |
Elemental-chlorine-free bleaching process having an initial Eo or Eop stage |
May. 27, 2003 |
| 6540871 |
Method for processing black liquor sediment |
Apr. 1, 2003 |
| 6517729 |
Oxidation process of the wet oxidation or ozonization type |
Feb. 11, 2003 |
| 6514379 |
Procedure for arranging water circulations in integrated paper mill |
Feb. 4, 2003 |
| 6511578 |
Bleaching and delignifying cellulosic pulp using caroate/caro's acid solution |
Jan. 28, 2003 |
| 6503369 |
Process for producing cellulose and fertilizer by-product |
Jan. 7, 2003 |
| 6425974 |
Process for treating wastewater from a bleach plant |
Jul. 30, 2002 |
| 6425975 |
Process for concentrating soluble and colloidal substances in process waters |
Jul. 30, 2002 |
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