Hydrometallurgical method of extraction of copper from sulphide-

Details Hydrometallurgical method of extraction of copper from sulphide- Hydrometallurgical method of extraction of copper from sulphide-

1984-07-05

1985-11-12

Doll, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

423 24, 423 38, 423 46, 75101R, 75101BE, 75114, 75117, C25C 112

Patent

active

045526320

ABSTRACT:
Copper content in sulphide-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.

REFERENCES:
patent: 3736238 (1973-05-01), Kruesi et al.
patent: 3901776 (1975-08-01), Kruesi et al.
patent: 4288304 (1981-09-01), De Marthe et al.
patent: 4337128 (1982-06-01), Haakonsen et al.

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