Process for reactivating spent activated-carbon

Details Process for reactivating spent activated-carbon Process for reactivating spent activated-carbon

1975-04-07

1978-12-26

Hart, Charles N.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252420, B01D 1506

Patent

active

041315650

ABSTRACT:
Spent activated-carbon is fluidized and directly heated at a temperature of 100.degree. to 700.degree. C in the first zone with an off gas from the second zone to remove volatiles from the spent carbon. The carbon so treated is then indirectly heated in the second zone at a temperature of 500.degree. to 1000.degree. C in the substantial absence of oxygen with a combustion gas while being fluidized with steam or a steam-containing inert gas to activate the carbon. The process ensures effective utilization of heat energy and substantially reduces the loss of carbon.

REFERENCES:
patent: 2933454 (1960-04-01), Repik et al.
patent: 3816338 (1974-06-01), Corson

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