Recovering gold and silver from an aqueous solution containing c

Details Recovering gold and silver from an aqueous solution containing c Recovering gold and silver from an aqueous solution containing c

1984-11-28

1986-06-17

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

75118R, 75106, 75108, 423 29, C22B 1108

Patent

active

045955727

ABSTRACT:
A method of recovering gold and silver efficiently and almost completely from an aqueous solution containing cyanic compounds of gold and silver and which comprises adjusting the pH of the aqueous solution containing cyanic compounds of gold and silver to 6.0 or less, preferably to pH 3.0-5.0, by adding mineral acid, such as sulfuric acid or hydrochloric acid, preferably together with a small amount of active carbon, and subsequently passing the aqueous solution through an active carbon bed, preferably pretreated with mineral acid.

REFERENCES:
patent: 3970737 (1976-07-01), Davidson
patent: 4289532 (1981-09-01), Matson et al.

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