Selective solvent extraction using organophosphorus and...

Details Selective solvent extraction using organophosphorus and... Selective solvent extraction using organophosphorus and...

C - Chemistry, Metallurgy

22

B

53/375

C22B 3/00 (2006.01) C01G 3/00 (2006.01) C01G 9/00 (2006.01) C01G 45/00 (2006.01) C01G 51/00 (2006.01) C01G 53/00 (2006.01) C22B 3/26 (2006.01) C22B 3/40 (2006.01)

Patent

CA 1190048

ABSTRACT A process for the extraction of metal values, in particular divalent metal ions such as copper, nickel, zinc, cobalt and manganese from aqueous solutions thereof which may be well in the acid range for example of pH 2 to 4. Extraction is effected using known organophosphorus or carboxylic acid extractants but in combination with non-chelating oximes, preferably of aldehydes wherein the alpha-carbon atom is primary or secondary. A synergistic effect between the extractant and oxime enables extraction to take place at a lower pH than heretofore thereby saving in acid and neutralizing agents in many instances.

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