Process for the extraction of metal values using substituted...

C - Chemistry – Metallurgy – 07 – D

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C07D 213/78 (2006.01) C07D 213/79 (2006.01) C07D 213/80 (2006.01) C07D 213/81 (2006.01) C07D 213/82 (2006.01) C22B 3/36 (2006.01) C22B 9/02 (2006.01)

Patent

CA 1193265

ABSTRACT Metal values are extracted from aqueous solutions of metal salts containing halide or pseudo halide ions by pyridine derivatives containing the substituent -(COX)A where X is the group -OR1 or -NR2R3 and n is 1, 2 or 3. R1 is a hydrocarbyl group containing from 5 to 36 carbon atoms and R2 and R3 are hydrogen or a hydrocarbyl group wherein R2 and R3 together contain from 5 to 36 carbon atoms. The process is especially useful for the recovery of metals from leach solutions derived from sulphur-containing ores such as chalcopyrite.

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