Method for the recovery of metals using chloride leaching...

Details Method for the recovery of metals using chloride leaching... Method for the recovery of metals using chloride leaching...

2003-09-30

2009-06-16

Wyszomierski, George (Department: 1793)

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C075S739000, C075S741000

Reexamination Certificate

active

07547348

ABSTRACT:
The invention relates to a method for the recovery of metals, in particular copper, from a copper-bearing raw material, whereby the material is leached into a chloride-containing solution. The leaching of the raw material is performed oxidatively and at a sufficiently high redox potential that the copper in the copper chloride solution from leaching is mainly divalent. The chloride solution obtained, which contains copper and potentially other valuable metals, is fed to liquid-liquid extraction. In the extraction the copper is first transferred to the organic phase with extraction and then to a sulphate solution in stripping, which is fed to copper electrowinning.

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Derwent World Patent Index, Week 197442 “Leaching metals from fine sulphide particles-contg. At least two of nickel copper and precious metals”; AN 1974-72838V & BE 815657, Sep. 16, 1974 Abstract.

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