Recovery of germanium from aqueous solutions by solvent...

Details Recovery of germanium from aqueous solutions by solvent... Recovery of germanium from aqueous solutions by solvent...

C - Chemistry, Metallurgy

22

B

53/165, 252/30

C22B 41/00 (2006.01)

Patent

CA 1317273

ABSTRACT OF THE DISCLOSURE An improved method for selectively recovering Ge from acidic solution containing Ge and typically Zn, As, Cd, Sb, In, Cu and Fe (II) by multistage, countercurrent liquid-liquid extraction is described. The extractant used in the organic phase is an oxime, for example 5,8-diethyl-7-hydroxy-6 dodecanone oxime, mixed with at least one alkylphosphoric acid, for example either di-2-ethylhexyl phosphate alone or admixed with mono-2-ethylhexyl phosphate, dissolved in a hydrocarbon diluent. This mixed system shows better efficiency and selectivity for germanium than known systems using either oximes or alkylphosphoric acids separately.

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