Claims
- 1. In the process for preparing active carbon particles comprising
- a. mixing and shaping a particulate carbon material selected from the group consisting of petroleum coke, acid coke, wood charcoal, bituminous coal, lignite, carbon black and charred vegetable materials with petroleum acid sludge to form shaped articles therefrom;
- b. hardening the shaped articles from (a) by a heat treatment;
- c. deacidification of the material from (b) by further heat treatment;
- d. carbonization of the material from (c) with further heat treatment in the temperature range of from about 700.degree. F to 1500.degree. F and removal of substantially all of the volatile matter from these materials; and
- e. activation of the shaped articles from (d) with a gas comprising steam carried out at a temperature greater than 1500.degree. F, the improvement comprising carrying out step (d) in a multiple hearth furnace where each hearth is individually vented in such a manner that the volatile matter is removed from the vicinity of all of the material being carbonized substantially as rapidly as it is formed.
- 2. The process of claim 1 wherein step (a) is carried out at a temperature in the range of from about 0.degree. F. to 300.degree. F.
- 3. The process of claim 2 wherein step (b) is carried out in the temperature range of from about 180.degree. F. to 300.degree. F.
- 4. The process of claim 3 wherein step (c) is carried out in the temperature range of from about 300.degree. F. to 700.degree. F.
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation-in-part of my prior application Ser. No. 91,933 filed Nov. 23, 1970, now abandoned.
US Referenced Citations (5)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
91933 |
Nov 1970 |
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