Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1975-06-16
1976-10-26
Vertiz, Oscar R.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75101BE, 204108, 423 24, 423139, C01G 300, C01G 5100, C01G 5300
Patent
active
039881512
ABSTRACT:
Ammoniacal leach solutions containing nickel and copper (and possibly other base metal values) are treated by first extracting copper leaving nickel in the raffinate. The nickel in the raffinate is subsequently extracted with an organic extractant. The nickel loaded organic extractant is subsequently stripped with a highly concentrated ammonium salt solution to yield a strip concentrate from which nickel or nickel oxide is recoverable without electrolytic treatment. To prevent build up of copper in the nickel extraction circuit, part or all of the organic from the nickel strip circuit is recycled back to the copper extraction circuit where copper on the organic is eventually stripped. In the copper extraction circuit, the nickel on the recycled organic is replaced by copper from the aqueous, preventing build up of nickel on the organic leaving the copper extraction circuit.
REFERENCES:
patent: 3276863 (1966-10-01), Drobnick et al.
patent: 3761249 (1973-09-01), Ritcey et al.
patent: 3794719 (1974-02-01), Lowenhaupt et al.
patent: 3853725 (1974-12-01), Skarbo
patent: 3855090 (1974-12-01), Skarbo
patent: 3907966 (1975-09-01), Skarbo
Evans et al., Editors, International Symposium on Hydrometallurgy, A.I.M.E., New York 1973, pp. 552-588.
Natwig David L.
Skarbo Roald R.
Hearn Brian E.
Kennecott Copper Corporation
Lorusso Anthony M.
McCarter Lowell H.
Sniado John L.
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