Liquid/liquid extraction of gallium values from basic aqueous so

Details Liquid/liquid extraction of gallium values from basic aqueous so Liquid/liquid extraction of gallium values from basic aqueous so

1989-03-27

1991-04-16

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

423112, B01D 1100

Patent

active

050080164

ABSTRACT:
Gallium values are separated and recovered from basic aqueous solutions thereof, e.g., Bayer process aluminate liquors, by liquid/liquid extracting such a basic aqueous solution with an organic phase containing a substituted hydroxyquinoline gallium extractant dissolved in an organic solvent, and whereby the gallium values, as well as sodium and aluminum values, are transferred into the organic phase, separating the organic phase from the basic aqueous phase, next contacting the organic phase with a medium consisting essentially of water to convert the coextracted sodium values into caustic soda, separating such caustic soda from the organic phase (and optionally recycling same to the Bayer process), and then recovering the gallium values from the organic phase thus stripped of sodium values.

REFERENCES:
patent: 3971843 (1976-07-01), Helgorsky et al.
patent: 4169130 (1979-09-01), Helgorsky et al.

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