METHOD OF PRODUCTION OF TANTALUM AND NIOBIUM PENTOXIDE Russian patent published in 2000 - IPC

Abstract RU 2160709 C2

FIELD: production of high-purity products. SUBSTANCE: complex niobium and tantalum polymer compounds are used as starting material. They are treated with mixture of sulfuric acid and hydrogen peroxide for extraction of niobium and tantalum to aqueous phase. Niobium and tantalum are hydrolyzed diluting with water. Hydroxides thus obtained are molten together with mixture of sulfuric acid and ammonium sulfate and alloy is leached with water or acid solutions. End product is separated from solution by filtration, drying and heating of sediment. EFFECT: enhanced chemical purity of product; increased output; low cost. 2 ex

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RU 2 160 709 C2

Authors

Shul'Gin L.P.

Garmazov Ju.L.

Dates

2000-12-20Published

1996-04-01Filed