Recovery of arsenic from ores and concentrates

Details Recovery of arsenic from ores and concentrates Recovery of arsenic from ores and concentrates

1984-03-15

1989-12-19

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group va metal or arsenic

423617, C01G 2800

Patent

active

048882070

ABSTRACT:
Arsenic, in the form of As.sub.2 O.sub.3, is recovered from arsenical ores or concentrates by leaching with a hot acidic ferric salt solution to extract arsenic, followed by cooling the pregnant leach solution to crystallize As.sub.2 O.sub.3. Leaching of some ores or concentrates is facilitated by addition of silver sulfate or mercuric sulfate to catalyze the leaching reaction.

REFERENCES:
patent: 1952290 (1934-03-01), Shopper
patent: 2959467 (1960-11-01), Yusuf
patent: 4220670 (1980-09-01), Fugleberg et al.
patent: 4241039 (1980-12-01), Koh et al.
patent: 4401632 (1983-08-01), Madsen et al.
patent: 4438079 (1984-03-01), Nakano et al.
patent: 4452762 (1984-06-01), Fugleberg et al.

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