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Class Information
Number: 162/47
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > With heat recovery
Description: Processes combined with a separation or recovery of heat from the chemical digestion or treatment.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7294225 |
Process for production of synthesis gas in combination with the maintenance of the energy balance for a pulp mill |
Nov. 13, 2007 |
| 7229526 |
Method and apparatus for the feeding of fibers |
Jun. 12, 2007 |
| 7112256 |
Method for continuous cooking of chemical pulp to improve heat economy |
Sep. 26, 2006 |
| 7005034 |
Method in connection with the production of mechanical pulp |
Feb. 28, 2006 |
| 6939439 |
Batch process for producing chemical pulp by removing and reintroducing calcium-containing spent liquor in the digester |
Sep. 6, 2005 |
| 6821382 |
Method and arrangement for cleaning contaminated condensate including a combined stripper/condenser |
Nov. 23, 2004 |
| 6797125 |
Method of treating condensates |
Sep. 28, 2004 |
| 6790313 |
Method of cleaning sulfide contaminated condensates |
Sep. 14, 2004 |
| 6761799 |
Method and arrangement for combusting black liquor |
Jul. 13, 2004 |
| 6596908 |
Process for the recovery of low molecular weight phenols, furfural, furfuryl alcohol and/or cellulose or cellulose-rich residues |
Jul. 22, 2003 |
| 6524436 |
Flash tank steam economy improvement |
Feb. 25, 2003 |
| 6464826 |
Method for producing and treating wood fiber |
Oct. 15, 2002 |
| 6419788 |
Method of treating lignocellulosic biomass to produce cellulose |
Jul. 16, 2002 |
| 6383342 |
Cluster rule compliance with reduced steam consumption |
May. 7, 2002 |
| 6375795 |
Minimization of malodorous gas release from a cellulose pulp mill feed system |
Apr. 23, 2002 |
| 6350348 |
Batch cooking with black liquor pretreatment |
Feb. 26, 2002 |
| 6332950 |
Method in connection with the pretreatment of comminuted fibrous material |
Dec. 25, 2001 |
| 6306252 |
Heat recovery from spent digester cooking liquor |
Oct. 23, 2001 |
| 6284095 |
Minimization of malodorous gas release from a cellulose pulp mill feed system |
Sep. 4, 2001 |
| 6258206 |
Process for purifying condensate while evaporating waste liquors |
Jul. 10, 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 |
| 6179958 |
Method for continuous cooking of cellulose-containing fibre material |
Jan. 30, 2001 |
| 6176971 |
Heat economy enhancements for the recovery and use of energy obtained from spent cooking liquors |
Jan. 23, 2001 |
| 6168685 |
Process FOR oxidation of concentrated black liquor |
Jan. 2, 2001 |
| 6136145 |
Method for treating pulp in an indirect heat exchanger in connection with bleaching |
Oct. 24, 2000 |
| 6132555 |
Method and arrangement for increasing evaporation capacity of a multi-stage evaporator of spent liquor in a pulp mill |
Oct. 17, 2000 |
| 6113739 |
Process for washing gas formed by gasifying black liquor |
Sep. 5, 2000 |
| 6071380 |
Method of papermaking having zero liquid discharge |
Jun. 6, 2000 |
| 6047649 |
Method and arrangement in cooling medium circulation of a recovery boiler |
Apr. 11, 2000 |
| 5962676 |
Processes for the modification and utilization of bacterial cellulose |
Oct. 5, 1999 |
| 5961784 |
Method for reducing the consumption of fresh water in a paper mill by means of a cooling tower |
Oct. 5, 1999 |
| 5961781 |
Process for recovering heat energy by condensation of vapor and dilution of sodium hydroxide using a condensing heat exchanger scrubbing system |
Oct. 5, 1999 |
| 5958183 |
River water heat exchanger for cooling process liquid in a paper-making machine |
Sep. 28, 1999 |
| 5944950 |
Process for the final evaporation of black liquor |
Aug. 31, 1999 |
| 5882477 |
Continuous digester with a low temperature gas-phase |
Mar. 16, 1999 |
| 5855737 |
Process for regenerating a liquid created in the kraft process for pulping wood, while simultaneously obtaining high energy efficiency |
Jan. 5, 1999 |
| 5830314 |
Cleaning condensates from multi-effect evaporator of cellulose pulp waste liquors |
Nov. 3, 1998 |
| 5762758 |
Method of papermaking having zero liquid discharge |
Jun. 9, 1998 |
| 5735331 |
Method and apparatus for regulating the temperature in a chemical melt dissolving tank |
Apr. 7, 1998 |
| 5699746 |
Method and apparatus for feeding air into a furnace |
Dec. 23, 1997 |
| 5643410 |
Batch process for preparing kraft pulp in a batch digesting process |
Jul. 1, 1997 |
| 5637192 |
Endothermic spent liquor recovery process |
Jun. 10, 1997 |
| 5635026 |
Cooking cellulose material with high alkali concentrations and/or high pH |
Jun. 3, 1997 |
| 5607549 |
Method for the manufacture of cooking liquors of different sulphidity by green liquor crystallization |
Mar. 4, 1997 |
| 5603803 |
Method and apparatus for recovering heat in a spent liquor recovery boiler |
Feb. 18, 1997 |
| 5591303 |
Process for operating a digester |
Jan. 7, 1997 |
| 5536371 |
Papermaking sludge recovery process and apparatus |
Jul. 16, 1996 |
| 5478440 |
Method and apparatus for improving the safety of a spent liquor recovery boiler |
Dec. 26, 1995 |
| 5454911 |
Apparatus for hydrolyzing and drying lignocellulosic material |
Oct. 3, 1995 |
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