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Class Information
Number: 162/239
Name: Paper making and fiber liberation > Apparatus > Digester > With recovery means
Description: Apparatus provided with means to salvage or make available for reuse heat and/or products resulting from the digestion process.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7381302 |
Method and arrangement for impregnating chips |
Jun. 3, 2008 |
| 7368037 |
Refiner steam separation system for reduction of dryer emissions |
May. 6, 2008 |
| 7285179 |
Continuous digester for cellulose pulp including method and recirculation system for such digester |
Oct. 23, 2007 |
| 7156952 |
Method and arrangement for oxygen delignification of cellulose pulp |
Jan. 2, 2007 |
| 7105076 |
Gas phase continuous digester having an inverted top separator with liquor injection |
Sep. 12, 2006 |
| 6582554 |
Continuous digester having a sectioned top separator with multiple liquor extraction ports |
Jun. 24, 2003 |
| 6524436 |
Flash tank steam economy improvement |
Feb. 25, 2003 |
| 6464826 |
Method for producing and treating wood fiber |
Oct. 15, 2002 |
| 6447645 |
Feeding cellulose material to a treatment vessel |
Sep. 10, 2002 |
| 6332954 |
Continuous digester system having a top separator |
Dec. 25, 2001 |
| 6306252 |
Heat recovery from spent digester cooking liquor |
Oct. 23, 2001 |
| 6280567 |
System and method for treatment of cellulose-containing material prior to pulp digestion |
Aug. 28, 2001 |
| 6165316 |
Method and plant for separating soap from black liquor using a pressure screen |
Dec. 26, 2000 |
| 6132555 |
Method and arrangement for increasing evaporation capacity of a multi-stage evaporator of spent liquor in a pulp mill |
Oct. 17, 2000 |
| 5922171 |
Method and apparatus for removing sodium chloride from pulping chemicals using an amphoteric ion-exchange resin |
Jul. 13, 1999 |
| 5591308 |
Wood pulp reactor |
Jan. 7, 1997 |
| 5547543 |
Apparatus for minimizing effluent discharges and recovering chemicals in a pulp mill |
Aug. 20, 1996 |
| 5439556 |
Oxidation of white liquor using a packing column |
Aug. 8, 1995 |
| 5437768 |
Non-baffled low pressure drop vacuum cooled inserted smelt spout |
Aug. 1, 1995 |
| 5405502 |
Apparatus for treating black liquor |
Apr. 11, 1995 |
| 5382322 |
Selective white liquor oxidation |
Jan. 17, 1995 |
| 5266487 |
Apparatus for the treatment of lignocellulosic materials |
Nov. 30, 1993 |
| 5256255 |
Displacement heating in continuous digesters |
Oct. 26, 1993 |
| 5236553 |
Continuous cooking with reduced horsepower and pulp degradation |
Aug. 17, 1993 |
| 5192396 |
Process for the continuous digestion of cellulosic fiber material |
Mar. 9, 1993 |
| 5080755 |
Process for the continuous digestion of cellulosic fiber material |
Jan. 14, 1992 |
| 5059284 |
Apparatus to displace a digester from both ends |
Oct. 22, 1991 |
| 4988407 |
Process and apparatus for producing dry black liquor solids |
Jan. 29, 1991 |
| 4963227 |
System and apparatus for recovery of turpentine from thermomechanical pulping process |
Oct. 16, 1990 |
| 4915784 |
Process and apparatus for removing contaminants from pulp digester vent gas |
Apr. 10, 1990 |
| 4808265 |
Method of washing pulp in a pressure pulp washer adding two washing liquids |
Feb. 28, 1989 |
| 4568422 |
System for recovering heat in an alkaline pulp digesting process |
Feb. 4, 1986 |
| 4384920 |
Method and apparatus for oxygen delignification |
May. 24, 1983 |
| 4269656 |
Wood pulp forming system and method of recovering spent chemicals |
May. 26, 1981 |
| 4259151 |
Pulping apparatus |
Mar. 31, 1981 |
| 4212705 |
Apparatus for recovering high pressure steam from a blow tank |
Jul. 15, 1980 |
| 4208286 |
Sulphate soap skimming apparatus |
Jun. 17, 1980 |
| 4138311 |
Method and apparatus for batch production of pulp including improved energy reclamation |
Feb. 6, 1979 |
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