C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
252/30, 23/375,
C09K 3/00 (2006.01) C01G 3/00 (2006.01) C01G 51/00 (2006.01) C01G 53/00 (2006.01) C22B 3/26 (2006.01)
Patent
CA 1137457
ABSTRACT An extractant system comprising (a) a high molecu- lar weight alkylaromatic sulfonic acid and (b) a chelat- ing amine having a pKa of from about 3 to about 9 in a solvent which is essentially immiscible with water, said system being useful for the selective extraction of desired metals, e.g., cobalt, nickel or copper ions from aqueous acidic ore leach liquors.
357049
Smart & Biggar
The Dow Chemical Company
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