Recovery of gallium values from basic aqueous solutions thereof

Details Recovery of gallium values from basic aqueous solutions thereof Recovery of gallium values from basic aqueous solutions thereof

1990-11-15

1993-04-20

Morris, Theodore

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423111, 423112, 423131, 423DIG14, 423624, C01G 1500, C22B 5800

Patent

active

052040747

ABSTRACT:
Gallium values are recovered from basic aqueous solutions thereof, e.g., Bayer liquors, by (i) contacting such basic aqueous solution (A) with a medium (I) containing a gallium extractant, whereby the gallium values are transferred to the medium (I), (ii) contacting such gallium-enriched medium (I) with a basic aqueous solution (B) and back-extracting the gallium values into the basic aqueous solution (B), (iii) contacting such gallium-enriched basic aqueous solution (B) with a second medium (II) containing a gallium extractant, whereby the gallium values are transferred to the medium (II), and (iv) contacting such gallium-enriched medium (II) with an aqueous solution (C), which may be acidic or basic, and back-extracting the gallium values into the aqueous solution (C); such gallium-enriched aqueous solution (C) may, for example, be directly electrolyzed to produce gallium metal.

REFERENCES:
patent: 4169130 (1979-11-01), Helgorsky et al.
patent: 4724129 (1988-02-01), Helgorsky et al.
patent: 4999171 (1991-03-01), Kato et al.
European Patent Application, 0234319, published Feb. 9, 1987.

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