Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1977-12-19
1979-01-23
Ozaki, G.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75121, 204105R, 423129, C22B 5800, C25C 124
Patent
active
041359178
ABSTRACT:
A process for recovering gallium from alkali aluminate solutions which consists in that the starting alkali aluminate solution is neutralized to a concentration of the caustic alkali of from 0.1 to 10 g/l, whereafter the neutralized liquor is evaporated to a concentration of the caustic alkali therein of from 30 to 150 g/l. Then the evaporated solution is corrected to obtain the ratio between the alkali metal oxide and alumina of above 2.0. The corrected solution is treated with a liquid alloy of gallium containing an element possessing an oxidizing potential exceeding that of gallium to give a concentrate containing more than 90% of gallium by mass, wherafter gallium of a higher purity grade is recovered from the resulting concentrate by the electrochemical method.
The process according to the present invention makes it possible to recover gallium from alkali solutions resulting from the treatment of nephelines with the production of a 90% gallium concentrate, wherefrom gallium of an increased purity is obtained at relatively low cost. Processing of the concentrate with the production of gallium is simple, it is not encountered with any additional expenses and requires no additional equipment.
Another advantage of the process resides in a more comprehensive utilization of low-grade aluminum-containing ores.
REFERENCES:
patent: 3094378 (1963-06-01), Wolf
patent: 3170857 (1965-02-01), Dotzer
patent: 3677918 (1972-07-01), Miyake
patent: 3890427 (1975-06-01), Dewey et al.
patent: 3933604 (1976-01-01), Honey et al.
patent: 3988150 (1976-10-01), Shalavina et al.
patent: 4061551 (1977-12-01), Ivanova et al.
Badaliants Khoren A.
Belsky Arkady A.
Butorin Leonid M.
Danilina Anna E.
Eljutin Alexandr V.
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