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Class Information
Number: 162/40
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 > Digestion fluid reused on different fibrous materials > Without treatment or modification
Description: Processes in which digestion fluid resulting from treatment of one batch of fibrous material is employed without treatment or modification for treatment of a different batch of fibrous material.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7604711 |
Method to optimize temperature profiles displacement batch cooking |
Oct. 20, 2009 |
| 7241363 |
Methods to decrease scaling in digester systems |
Jul. 10, 2007 |
| 7112256 |
Method for continuous cooking of chemical pulp to improve heat economy |
Sep. 26, 2006 |
| 6939439 |
Batch process for producing chemical pulp by removing and reintroducing calcium-containing spent liquor in the digester |
Sep. 6, 2005 |
| 6699357 |
Process for continuous cooking of pulp |
Mar. 2, 2004 |
| 6605180 |
Process for continuous cooking of pulp |
Aug. 12, 2003 |
| 6468390 |
Method for continuous cooking of lignocellulosic fiber material |
Oct. 22, 2002 |
| 6458242 |
Ozone bleaching process using oxalic acid addition |
Oct. 1, 2002 |
| 6315862 |
Process for bleaching pulp with adsorption of metals |
Nov. 13, 2001 |
| 6315863 |
Chlorine dioxide pulp bleaching process having reduced barium scaling by recycling post-chlorination waste filtrate |
Nov. 13, 2001 |
| 6210527 |
Pulp bleaching method wherein an ozone bleaching waste stream is scrubbed to form an oxygen containing stream |
Apr. 3, 2001 |
| 6103058 |
Method for the continuous cooking of pulp |
Aug. 15, 2000 |
| 5980689 |
Method of separating metal ions from pulp using a chelating agent |
Nov. 9, 1999 |
| 5688367 |
Method of monitoring and recovering oxygen-rich gas from ozone bleaching |
Nov. 18, 1997 |
| 5643410 |
Batch process for preparing kraft pulp in a batch digesting process |
Jul. 1, 1997 |
| 5587049 |
Process for delignifying raw cellulosic material impregnated with monopersulphuric acid |
Dec. 24, 1996 |
| 5525195 |
Process for high consistency delignification using a low consistency alkali pretreatment |
Jun. 11, 1996 |
| 5462641 |
Process for bleaching pulp with adsorption of metals |
Oct. 31, 1995 |
| 5460696 |
Oxygen delignification method incorporating wood pulp mixing apparatus |
Oct. 24, 1995 |
| 5415734 |
Process for bleaching pulp without using chlorine containing chemicals |
May. 16, 1995 |
| 5409570 |
Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone |
Apr. 25, 1995 |
| 5296097 |
Method for reducing contaminants in pulp prior to ozone bleaching |
Mar. 22, 1994 |
| 5277760 |
Process for the manufacture of pulp for paper, and fiberboard products using alkaline cooking chemical and oxygen in a closed, continuous and pressurized tube system |
Jan. 11, 1994 |
| 5236553 |
Continuous cooking with reduced horsepower and pulp degradation |
Aug. 17, 1993 |
| 5217574 |
Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp |
Jun. 8, 1993 |
| 5211811 |
Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification |
May. 18, 1993 |
| 5188708 |
Process for high consistency oxygen delignification followed by ozone relignification |
Feb. 23, 1993 |
| 5183535 |
Process for preparing kraft pulp using black liquor pretreatment reaction |
Feb. 2, 1993 |
| 5173153 |
Process for enhanced oxygen delignification using high consistency and a split alkali addition |
Dec. 22, 1992 |
| 5145557 |
Chlorine-free bleaching method for dissolving-grade pulps using an OP-Z-P sequence |
Sep. 8, 1992 |
| 5143580 |
Process for reducing the amount of halogenated organic compounds in spent liquor from a peroxide-halogen bleaching sequence |
Sep. 1, 1992 |
| 5118389 |
Two-stage peroxide bleaching process using different amounts of peroxide on different portions of mechanical pulp |
Jun. 2, 1992 |
| 5089086 |
Process for continuous cooking of cellulose |
Feb. 18, 1992 |
| 5085734 |
Methods of high consistency oxygen delignification using a low consistency alkali pretreatment |
Feb. 4, 1992 |
| 4999085 |
Method for screening of defibered chlorine dioxide bleached pulp during alkaline extraction |
Mar. 12, 1991 |
| 4922989 |
Treatment of mechanical pulp to remove resin |
May. 8, 1990 |
| 4834837 |
Method for delignification of cellulose with oxygen |
May. 30, 1989 |
| 4825937 |
Sealing apparatus for automobile radiators |
May. 2, 1989 |
| 4764596 |
Recovery of lignin |
Aug. 16, 1988 |
| 4743338 |
Method of removing air from lignocellulosic material by passing the material through conduit paths of different diameters |
May. 10, 1988 |
| 4705600 |
Method for the treatment of pulp with liquid |
Nov. 10, 1987 |
| 4602982 |
Process for delignifying bleaching lignin-containing cellulose pulp by activating the pulp with NO.sub.2 and O.sub.2 gas in the presence of water, sodium nitrate and nitric acid |
Jul. 29, 1986 |
| 4529479 |
Method for multistage bleaching and washing with recycle of displaced bleaching liquor |
Jul. 16, 1985 |
| 4459174 |
Process for the delignification and bleaching of chemical and semi-chemical cellulosic pulps |
Jul. 10, 1984 |
| 4451332 |
Method for delignification of ligno-cellulose containing fiber material with an alkali-oxygen extraction stage |
May. 29, 1984 |
| 4445969 |
Process for the delignifying bleaching of cellulose pulp by activating the pulp with NO.sub.2 and oxygen |
May. 1, 1984 |
| 4406735 |
Process for alkaline oxygen gas bleaching of cellulose pulp |
Sep. 27, 1983 |
| 4397712 |
Semi-chemical pulping process |
Aug. 9, 1983 |
| 4372811 |
Alkaline oxygen delignification and bleaching of cellulose pulp in the presence of aromatic diamines |
Feb. 8, 1983 |
| 4372812 |
Chlorine free process for bleaching lignocellulosic pulp |
Feb. 8, 1983 |
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