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Class Information
Number: 162/240
Name: Paper making and fiber liberation > Apparatus > Digester > With recovery means > With incinerator or evaporator
Description: Apparatus having means to apply heat to the used chemicals to cause a change in the state or nature of the chemicals to render them fit for reuse.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6524436 |
Flash tank steam economy improvement |
Feb. 25, 2003 |
| 5676797 |
Apparatus for removing high-volume, low concentration non-condensable gases produced in a kraft pulping process |
Oct. 14, 1997 |
| 5547543 |
Apparatus for minimizing effluent discharges and recovering chemicals in a pulp mill |
Aug. 20, 1996 |
| 5437768 |
Non-baffled low pressure drop vacuum cooled inserted smelt spout |
Aug. 1, 1995 |
| 5368731 |
Vacuum assisted slaker classifier |
Nov. 29, 1994 |
| 4944840 |
Method and apparatus for evaporating waste liquor produced when cooking fibrous material containing cellulose |
Jul. 31, 1990 |
| 4897157 |
Make-up liquor and black liquor evaporating processing during pulp production |
Jan. 30, 1990 |
| 4889592 |
Process and apparatus for control in burning and slaking of lime and causticizing |
Dec. 26, 1989 |
| 4498955 |
Control of active alkali in black liquor |
Feb. 12, 1985 |
| 4311666 |
Apparatus for controlling the degree of causticization in the preparation of white liquor from the chemicals recovered from black liquor |
Jan. 19, 1982 |
| 4280982 |
Apparatus for treating waste material while preventing smelt-water explosions |
Jul. 28, 1981 |
| 4154643 |
Recovery process and apparatus for alkali metal-containing spent liquor |
May. 15, 1979 |
| 4035228 |
Recovery process and apparatus for alkali metal-containing waste liquor |
Jul. 12, 1977 |
| 4011047 |
Smelt spout for recovery boiler |
Mar. 8, 1977 |
| 3959068 |
Process and apparatus for recovery of sulfur from a polysulfide pulping operation |
May. 25, 1976 |
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