Process for the recovery of silver values from silver-containing

Details Process for the recovery of silver values from silver-containing Process for the recovery of silver values from silver-containing

1980-08-19

1982-05-25

Hearn, Brian E.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75118R, 75 83, 423 34, 423 37, 423 87, 423140, 423150, C22B 1104

Patent

active

043314694

ABSTRACT:
A process for the recovery of silver values from silver-containing material which also contains iron and arsenic includes leaching the material under oxidizing conditions at elevated temperature and pressure in aqueous nitric acid solution to dissolve a substantial amount of silver together with substantial amounts of arsenic, iron and other metals if present. The resultant leach solution is separated from undissolved leach residue and treated with a solution containing chloride ions to selectively precipitate substantially all dissolved silver as silver chloride without significant co-precipitation of other dissolved metals. The silver chloride precipitate is then separated from the remaining solution.

REFERENCES:
patent: 1071290 (1913-08-01), Birkeland
patent: 1119473 (1914-12-01), Thacher
patent: 1150787 (1915-08-01), Rankin
patent: 3929466 (1975-12-01), Moynohan
patent: 3965239 (1976-06-01), Posel
patent: 4038361 (1977-07-01), Posel
patent: 4084961 (1978-04-01), Caldon
patent: 4118243 (1978-10-01), Sandesara
patent: 4123499 (1978-10-01), Welsh
Chem. Abstracts, vol. 67,(1967), No. 76,772g.
Masterton et al., Chemical Principles, W. B. Saunders Co., Phila., Pa., (1967), p. 404.

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