Method for purifying the solution in the hydrometallurgical...

Details Method for purifying the solution in the hydrometallurgical... Method for purifying the solution in the hydrometallurgical...

2007-11-13

2007-11-13

King, Roy (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

Reexamination Certificate

active

10492893

ABSTRACT:
The invention relates to the removal of bivalent copper from copper chloride solution in connection with the hydrometallurgical production of copper. In the copper production process, a copper-bearing raw material is leached with a chloride-bearing solution. The copper chloride solution formed in the leaching, which contains both mono- and bivalent copper, undergoes bivalent copper removal at least in part by precipitation, and the copper(I) chloride solution is conduced to further treatment. Precipitation of the bivalent copper occurs as alkaline copper chloride precipitation. The alkaline copper (II) chloride formed is leached as copper(II) chloride either separately or in connection with raw material leaching, and is used in copper raw material leaching.

REFERENCES:
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patent: 5487819 (1996-01-01), Everett
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patent: 6929677 (2005-08-01), Hamalainen
The Copper Development Assocation (CDA), Copper.org, http://www.copper.org/applications/compounds/other—compounds.html, printed from website Nov. 21, 2006.

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