C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/287, 53/306
C22B 3/10 (2006.01) C22B 3/00 (2006.01) C22B 11/06 (2006.01) C22B 15/00 (2006.01) C22B 23/00 (2006.01)
Patent
CA 1327452
SEPARATION OF NICKEL FROM COPPER IN AUTOCLAVE INVENTORS: Thomas Thomassen Carl Otto Kostol Hans Zachariasen Erling Stensholt APPLICANTS: FALCONBRIDGE LIMITED TORONTO, ONTARIO CANADA ABSTRACT Nickel is separated from copper contained in predominantly nickel and copper bearing sulphidic matte and alloys by chlorine leaching in an autoclave at over-atmospheric pressure. The leach is conducted in an acidic solution at a redox potential range which favours the dissolution of nickel over copper. The obtained leach solution is purified in a cementation step carried out at atmospheric or over-atmospheric pressure by adding more sulphidic matte or alloy particles. The separated purified solution is treated for nickel recovery. Any cobalt present in the sulphidic matte or alloy reports with the nickel. Copper is recovered from the separated residue, which will also retain precious metals if present.
539730
Kostol Carl Otto
Stensholt Erling
Thomassen Thomas
Zachariasen Hans
Falconbridge Limited
Goudreau Gage Dubuc
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