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-OR, or -NR2R3 and n is 1,2 or 3. R, 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.
含有取代基-(COX)A 的
吡啶衍生物可从含有卤化物或假卤化物离子的
金属盐
水溶液中萃取
金属值,其中 X 为基团-OR 或-NR2R3,n 为 1、2 或 3。R,是含有 5 至 36 个碳原子的烃基,R2 和 R3 是氢或烃基,其中 R2 和 R3 共含有 5 至 36 个碳原子。该工艺特别适用于从
黄铜矿等含
硫矿石的浸出液中回收
金属。