Extraction or recovery of non-ferrous metal values from arsenic-

Details Extraction or recovery of non-ferrous metal values from arsenic- Extraction or recovery of non-ferrous metal values from arsenic-

1994-04-20

1996-01-09

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75744, 423 87, C22B 344

Patent

active

054825342

ABSTRACT:
A process suitable for the extraction or recovery of metal values from arsenic containing feeds and including the steps of: a) treating the feed with a nitric acid-containing leachant solution in order to dissolve the desired metals; b) adding a source of iron (III) to the leachant solution whereby to oxidise arsenic (III) in solution to arsenic (V); c) adding a neutralising agent to the leachant solution whereby to precipitate arsenic as arsenic (V); d) separating the arsenic (V) precipitate from the leachant solution; and e) recording metal values from the leachant solution.

REFERENCES:
patent: 3986866 (1976-10-01), Coffer
patent: 4241039 (1980-12-01), Koh et al.
patent: 4244734 (1981-01-01), Reynolds et al.
patent: 4244735 (1981-01-01), Reynolds et al.
patent: 4331469 (1982-05-01), Kunda
patent: 5344479 (1994-09-01), Kerfoot et al.
Derwent Abstract Accession No. 83-762858/37, Class M25, RO,A, 81-260 (Dobrogea Intr Mini) 28 Feb. 1983 (28.02.83), Abstract.

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