Regeneration of activated carbon to increase its gold adsorption

Details Regeneration of activated carbon to increase its gold adsorption Regeneration of activated carbon to increase its gold adsorption

1979-09-28

1981-05-12

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

75118R, 210694, 252413, 423 25, 423 27, 423 35, B01J 2034, C22B 1104, C22B 1108

Patent

active

042670691

ABSTRACT:
A method of regenerating an activated carbon which has had its collecting capacity for gold adsorption reduced through use which includes the step of contacting the carbon with an aqueous copper salt solution having a pH of less than 6. The regeneration is improved if the solution contains carbonic acid or if the copper salt solution treatment is followed by treatment with a carbonate or bicarbonate solution.

REFERENCES:
patent: 3920403 (1975-11-01), Ross
patent: 3935006 (1976-01-01), Fisher
patent: 3970737 (1976-07-01), Davidson
patent: 4094668 (1978-06-01), Yannopoulos et al.
patent: 4155983 (1979-05-01), Zaleski
patent: 4208378 (1980-06-01), Heinen et al.
Chem. Abs.-vol. 84, No. 4-1/26/76-p. 318, No. 21847f.
J. of Applied Chemistry of the U.S.S.R.-vol. 50, No. 3.1, Mar. 1977-pp. 504-506, New York, A. L. Grabovskii et al.

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