C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
204/71, 53/371.5
C22B 3/00 (2006.01) C01G 37/04 (2006.01) C01G 49/10 (2006.01) C22B 3/28 (2006.01) C22B 3/38 (2006.01) C22B 34/32 (2006.01) C25B 1/06 (2006.01) C25C 1/00 (2006.01)
Patent
CA 1059770
ABSTRACT OF THE DISCLOSURE A hydrometallurgical treatment process for extract- ing in a pure (elemental) or other commercially usable form, constituent metals from ferro-nickel, is disclosed. Said process comprises the steps of: a) treating the ferro-nickel with chlorine in an aqueous medium and filtering the resultant matter. b) oxidising the filtrate c) removing the iron contained in the oxidised filtrate by liquid/liquid exchange by means of an organic phase (i) con- taining tributyl phosphate and regenerating the organic phase (i) by means of an aqueous phase (ii) thus yielding a pure aqueous solution of ferric chloride; d) removing the cobalt contained in the oxidised filtrate by liquid/liquid exchange by means of an organic phase (iii) containing a tertiary amine and regenerating the organic phase (iii) by means of an aqueous phase (iv) thus yielding a pure aqueous solution of cobalt chloride; and e), which may be omitted if the ferro-nickel contains negligible chromium, removing the chromium contained in the oxidised filtrate by liquid/liquid exchange by means of an organic phase (v) containing an alkylphosphoric acid and regenerating the organic phase (v) by means of an aqueous phase (vi) thus yield- ing a pure aqueous solution of chromium chloride; the resultant oxidised filtrate comprising a solution of nickel chloride. As an optional step, at least one of the solutions of ferric chloride, cobalt chloride, chromiun chloride or nickel chloride is treated (eg. via electrolysis) so as to obtain the corres- ponding metal in elemental form.
231166
Demarthe Jean-Michel
Gandon Louis
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