Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Reexamination Certificate
2003-05-22
2008-10-21
Bos, Steven (Department: 1793)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
C423S027000, C423S109000, C423S150100, C423S150500
Reexamination Certificate
active
07438874
ABSTRACT:
A process for the extraction of a base metal such as Ni, Co or Zn, from suiphide ore or concentrate containing copper and the base metal comprises the step of subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containing halide and sulphate ions to produce a product solution containing copper and the base metal. The product solution is subjected to a copper extraction process for recovering copper from the solution and the product solution containing the base metal after copper recovery is recirculated for recycled to the pressure oxidation to effect build-up of the base metal in the product solution. Preferably, a stream which is split from the product solution is treated for the recovery of the base metal.
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Fleming, C.A., Ferron C.J., Dreisinger D.B. and O'Kane P.T.: “A process for the simultaneous leaching and recovery of gold, platinum group metals and base metals from ores and concentrates,” Internet Article, Online! Mar. 16, 2000, pp. 1-10, XP002254648.
Jones David L.
Moore Rachel
Stocker Susan Karen
Borden Ladner Gervais LLP
Bos Steven
Cominco Engineering Services Ltd.
de Kock Elbie R
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