LIQUID-LIQUID-EXTRACTION OF VANADIUM(V) AND NIOBIUM(V) WITH TRIS(2-ETHYLHEXYL)PHOSPHATE - MUTUAL SEPARATION OF VANADIUM(V), NIOBIUM(V), ANDTANTALUM(V), AND ANALYSIS OF STEEL SAMPLES

Authors
GAUDH JS SHINDE VM
Citation
Js. Gaudh et Vm. Shinde, LIQUID-LIQUID-EXTRACTION OF VANADIUM(V) AND NIOBIUM(V) WITH TRIS(2-ETHYLHEXYL)PHOSPHATE - MUTUAL SEPARATION OF VANADIUM(V), NIOBIUM(V), ANDTANTALUM(V), AND ANALYSIS OF STEEL SAMPLES, Separation science and technology, 30(12), 1995, pp. 2573-2584
Citations number
19
Categorie Soggetti
Engineering, Chemical","Chemistry Analytical
Journal title
Separation science and technology → ACNP
ISSN journal
01496395
Volume
30
Issue
12
Year of publication
1995
Pages
2573 - 2584
Database
ISI
SICI code
0149-6395(1995)30:12<2573:LOVANW>2.0.ZU;2-7
Abstract
Tris(2-ethylhexyl)phosphate (TEHP) dissolved in toluene is used for se lective extraction of vanadium(V) and niobium(V) from hydrochloric and hydrobromic acid solution. Vanadium is determined spectrophotometrica lly after backextraction from TEHP, whereas unstripped niobium is dete rmined in the TEHP phase with thiocyanate. The probable extractable sp ecies is VOCl3 . 2TEHP or NbOCl3 . 2TEHP/NbOBr3 . 2TEHP. The method pe rmits mutual separation of vanadium(V), niobium(V), and tantalum(V), a nd provides analysis of vanadium and niobium in alloys with a high deg ree of accuracy and precision.