Recovery of metal values from aqueous solutions

Details Recovery of metal values from aqueous solutions Recovery of metal values from aqueous solutions

1992-10-13

1994-01-11

Brunsman, David

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423 98, 423109, 423181, 423DIG4, 423 89, C01G 100, C01G 1500, C01D 1300, C01F 100

Patent

active

052778835

ABSTRACT:
A process is described for recovering metal values, e.g., gallium, contained in an aqueous solution by extraction comprising the steps of contacting the aqueous solution with a water immiscible organic phase comprising a water-insoluble substituted 8-hydroxyquinoline whereby the metal values are transferred into the organic phase; separating the organic phase from the aqueous solution and recovering the metal values from the organic phase. The novel feature comprises recovering the metal values by contacting the organic phase containing metal values with an aqueous solution of a strong base whereby metal values are removed from the organic phase to the aqueous solution with the aqueous solution containing the recovered metal values having a concentration of at least 4.6 moles per liter total hydroxide, and then separating the metal values from the aqueous phase.

REFERENCES:
patent: 3890427 (1975-06-01), Dewey et al.
patent: 3971843 (1976-06-01), Helgorsky
patent: 4485076 (1984-11-01), Bauer et al.
patent: 4559203 (1985-12-01), Bauer et al.
Chemical Engineers' Handbook 5th Edition, pp. 15-15-15-16 (1973)/Perry & Chilton.

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