Method of recovering tantalum from silicon-containing tantalum s

Details Method of recovering tantalum from silicon-containing tantalum s Method of recovering tantalum from silicon-containing tantalum s

1982-03-02

1984-05-01

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vb metal

423 66, 75101BE, C01G 3500

Patent

active

044461151

ABSTRACT:
Disclosed is method of recovering tantalum from silicon-containing tantalum scrap, which comprises dissolving said scrap in an inorganic acid, bringing the resulting solution into contact with an anionic exchange resin, followed by washing said anionic exchange resin with (a) a solution of 3 to 10 mol/l. of hydrofluoric acid or (b) a solution of strongly acidic medium containing 0.01 to 0.5 mol/l. of hydrofluoric acid and 1 to 6 mol/l. of a strong acid, and then washing the same with an aqueous solution of a mixture composed of hydrofluoric acid, aqueous ammonia and an ammonium salt.

REFERENCES:
patent: 2937072 (1960-05-01), McLean
Hague et al., "J. of Research, Bureau of Standards", vol. 62, 1959, pp. 11-19.
Bergstresser, "Analytical Chem.", vol. 31, 1959, pp. 1812-1814.
Kraus et al., "J. American Chem. Soc.", vol. 71, 1949, p. 3855.

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