Process for producing tantalum concentrates

Details Process for producing tantalum concentrates Process for producing tantalum concentrates

1980-06-11

1981-11-24

Lewis, Michael L.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75101R, 75115, 75121, 423 62, 423 66, 423 68, 423 82, C22B 300, C22B 3420

Patent

active

043022430

ABSTRACT:
In a process for producing tantalum concentrates from ores containing tantalum oxides, tantalic acid or its salts together with rutile type titanium dioxide in mixed crystals, the ores are treated in a sulfuric acid of a concentration not lower than 50% by weight with heating at a temperature from 200.degree. C. to the boiling point of said sulfuric acid, and then the above-treated products are treated with a reducing agent in an aqueous solution of sulfuric acid of a concentration lower than 50% by weight to dissolve the titanium component to thereby obtain tantalum concentrates as solid products.

REFERENCES:
patent: 2537316 (1951-01-01), Gjessing et al.
patent: 3003867 (1961-10-01), Lerner
patent: 3105755 (1963-10-01), Green
patent: 3107976 (1963-10-01), Koerner et al.
Mellor, J. W.; A Comprehensive Treatise on Inorganic and Theoretical Chemistry vol. 9, Longmans, Green and Co., pp. 840-843 (1929).
Fairbrother F., The Chemistry of Niobium and Tantalum Elserier Pub. Co. pp. 52-55, 64-67, 70-71 (1967).
Ehret, W. F., Smith's College Chemistry, 6th Edition D. Appleton--Century Co., Inc. pp. 288-289 (1946).
Chemical Abstracts vol. 54, No. 4292(u) (1960).

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