Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1997-04-29
1999-11-02
Kastler, Scott
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75743, C21B 1500
Patent
active
059762187
ABSTRACT:
A process for the recovery of nickel from a nickel containing ore in which the ore, particularly a laterite ore, is initially leached with an aqueous acid solution, after which the nickel is precipitated as nickel hydroxide by adding a hydroxide to the aqueous acid leach solution containing the nickel, followed by a re-leaching of the nickel with an aqueous ammoniacal solution and recovery of the nickel by a solvent extraction of the nickel from the aqueous ammoniacal solution with an organic phase of a water insoluble oxime extractant dissolved in a water-immiscible hydrocarbon solvent and the nickel recovered by electrowinning the nickel from the aqueous acid stripping solution employed to strip the nickel from the organic phase.
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MacKenzie J. Murdoch
Virnig Michael J.
Henkel Corporation
Jaeschke Wayne C.
Kastler Scott
Span Patrick J.
Szoke Ernest G.
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