Solvent extraction of niobium(V) and tantalum(V) from fluorometallate acid solutions

Solvent extraction of niobium(V) and tantalum(V) from fluorometallate acid solutions

The addition of Ti and Si to fluoride solutions containing no other mineral acids improves Nb and Ta extraction markedly. According to their effect on Nb extraction these fluorometallate and mineral acids can be arranged in the following order: H 2SiF 6 ≥ HCl > H 2TiOF 4 ≥ H 2SO 4 >> HF. So...

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Veröffentlicht in:Hydrometallurgy 1996-05, Vol.41 (1), p.71-78
Hauptverfasser: Mayorov, V.G., Nikolaev, A.I.
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container_title Hydrometallurgy
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creator Mayorov, V.G.
Nikolaev, A.I.
description The addition of Ti and Si to fluoride solutions containing no other mineral acids improves Nb and Ta extraction markedly. According to their effect on Nb extraction these fluorometallate and mineral acids can be arranged in the following order: H 2SiF 6 ≥ HCl > H 2TiOF 4 ≥ H 2SO 4 >> HF. Solvent extraction from fluorotitanium solution was used to show the possibility of producing pure Nb and Ta compounds.
doi_str_mv 10.1016/0304-386X(95)00018-C
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title Solvent extraction of niobium(V) and tantalum(V) from fluorometallate acid solutions
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