Recovery of platinum-group metals from ores

Details Recovery of platinum-group metals from ores Recovery of platinum-group metals from ores

1981-02-11

1982-06-29

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Platinum group metal

423 41, 423150, 75101R, 75121, C01G 5500, C01G 5310, C01G 310, C01G 700

Patent

active

043372260

ABSTRACT:
Metal values are recovered from ore concentrates by means of dry grinding, followed by a two-stage leaching process in which the ground concentrate is first leached with sulfuric acid at a temperature of about 90.degree. to 100.degree. C. to selectively leach nickel and iron. The residue is then leached with a solution comprising sulfuric acid and NaOCl or H.sub.2 O.sub.2 to extract platinum, palladium, copper and gold.

REFERENCES:
patent: 3293027 (1966-12-01), Maskin et al.
patent: 3741752 (1973-06-01), Evans et al.
patent: 3959436 (1976-05-01), Watts
patent: 4108639 (1978-08-01), Lake et al.
patent: 4188362 (1980-02-01), Edwards et al.

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