Process for purifying silver refinery slimes

Details Process for purifying silver refinery slimes Process for purifying silver refinery slimes

1985-08-26

1988-02-02

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Platinum group metal

423 39, 423 46, 423508, 75101R, 75114, 75118R, 75121, C22B 1104

Patent

active

047228318

ABSTRACT:
Gold sand resulting from the nitric acid treatment of silver refinery slimes is purified by washing with hydrochloric acid under controlled operating conditions. Platinum and other precious metals and impurities are selectively separated from the gold sand leaving a gold sand which is more efficiently refined.

REFERENCES:
patent: 1315660 (1919-09-01), Ferguson
patent: 1996985 (1935-04-01), Truthe
patent: 2835569 (1958-05-01), Reynaud et al.
patent: 4094668 (1978-05-01), Yannopoulos et al.
patent: 4293332 (1981-10-01), Wang et al.
patent: 4331469 (1982-05-01), Kunda
patent: 4374098 (1983-02-01), Iis et al.
patent: 4397689 (1983-08-01), Lea et al.
"Recovery, by a Nitric Acid Cycle, of Gold and Platinum Metals from the Anode Slimes Arising from the Electrolysis of Dore Metal", by B. Tougarinoff et al., pp. 741-758, 1967.
"An Outline of Metallurgical Practice", Third Edition, by C. R. Hayward, pp. 108-112.

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