Extraction or recovery of metal values

Details Extraction or recovery of metal values Extraction or recovery of metal values

C - Chemistry, Metallurgy

22

B

C22B 3/06 (2006.01) C22B 3/44 (2006.01) C22B 15/00 (2006.01) C22B 19/30 (2006.01) C22B 30/04 (2006.01)

Patent

CA 2119240

2119240 9308310 PCTABS00021 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) recovering metal values from the leachant solution.

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