Hydrometallurgical method of extraction of copper from...

Details Hydrometallurgical method of extraction of copper from... Hydrometallurgical method of extraction of copper from...

C - Chemistry, Metallurgy

22

B

53/287

C22B 15/00 (2006.01) C01G 3/00 (2006.01) C01G 49/00 (2006.01) C22B 3/32 (2006.01)

Patent

CA 1228735

ABSTRACT Copper content in sulfide - containing materials such as ores or concentrates is extracted by leaching the material by means of a leaching solution containing iron (III) chloride and copper (II) chloride, the leaching process being regulated in order to keep the red-ox potential in the leach solution between 430 mV and 460 mV, whereby iron (III) chloride is reduced to iron (II) chloride while copper (II) chloride is kept in the bivalent state. The copper content in the ore or concentrate is thereby leached as copper (II) chloride. Copper (II) chloride is thereafter extracted from the pregnant leach solution by contacting the solution with an organic complex-ion forming extractant which extraction properties are dependent on the chloride concentration.

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