Liquid-liquid extraction of vanadium(V) and niobium(V) with tris(2-ethylhexyl)phosphate: Mutual separation of vanadium(V), niobium(V), and tantalum(V), and analysis of steel samples
Journal Article
·
· Separation Science and Technology
- Institute of Science, Bombay (India)
Tris(2-ethylhexyl)phosphate (TEHP) dissolved in toluene is used for selective extraction of vanadium(V) and niobium(V) from hydrochloric and hydrobromic acid solution. Vanadium is determined spectrophotometrically after backextraction from TEHP, whereas unstripped niobium is determined in the TEHP phase with thiocyanate. The probable extractable species is VOCl{sub 3}{center_dot}2TEHP or NbOCl{sub 3}{center_dot}2TEHP/NbOBr{sub 3}{center_dot}2TEHP. The method permits mutual separation of vanadium(V), niobium(V), and tantalum(V), and provides analysis of vanadium and niobium in alloys with a high degree of accuracy and precision.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 146507
- Journal Information:
- Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 12 Vol. 30; ISSN 0149-6395; ISSN SSTEDS
- Country of Publication:
- United States
- Language:
- English
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