C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/308
C22B 3/38 (2006.01) C01G 51/00 (2006.01)
Patent
CA 1170839
ABSTRACT OF THE DISCLOSURE A process for the separation of cobalt from magnesium and nickel by extraction is disclosed in which a magnesium-bearing aqueous solution which contains cobalt and nickel is contacted with an organic solution which contains di-(alkyl)-phosphoric acid, alkylphosphonic acid monoalkyl ester or alkylphosphinic acid monoalkyl ester under conditions in which the distribution co- efficient of cobalt is at minimum 1.5 times higher than the distribution coefficient of magnesium and at the same time at minimum 30 times higher than the distribution coefficient of nickel, in which case the cobalt/magnesium ratio, prior to the extraction or during the extraction in the aqueous solution is adjusted to between 0.2 and 2.
378353
Hamalainen Matti J.
Hultholm Stig-Erik
Jansson Lars G.
Niemi Tom O.
Nyman Bror G.
Outokumpu Oy
Smart & Biggar
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