Anion exchange of chromium, molybdenum and tungsten species of various oxidation states, providing the basis for separation and purification in HCl solutions

T. Kékesi, Tamas I. Torok, Minoru Isshiki

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Anion exchange in HCl solutions has proved as a reliable and efficient tool for the purification of a number of transition metals. There is, however, little reliable information available concerning the anion exchange characteristics of the practically important elements in Group VIa of the Periodic Table (Cr, Mo and W). Therefore, a detailed study has been carried out to investigate the stability of the multiple oxidation states and the relevant anion exchange characteristics. Batch equilibrium results in HCl media have been verified by spectrophotometry, and new anion exchange sorption functions-indispensable for designing separations-have been proposed for the various species.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalHydrometallurgy
Volume77
Issue number1-2
DOIs
Publication statusPublished - Apr 2005

Fingerprint

Tungsten
Molybdenum
Chromium
tungsten
molybdenum
Purification
Anions
purification
chromium
ion exchange
Ion exchange
Negative ions
oxidation
Oxidation
Spectrophotometry
transition element
spectrophotometry
Transition metals
Sorption
sorption

Keywords

  • Anion exchange
  • Chromium
  • Hydrochloric acid
  • Light absorption spectra
  • Molybdenum
  • Oxidation states
  • Separation
  • Tungsten

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

Cite this

Anion exchange of chromium, molybdenum and tungsten species of various oxidation states, providing the basis for separation and purification in HCl solutions. / Kékesi, T.; Torok, Tamas I.; Isshiki, Minoru.

In: Hydrometallurgy, Vol. 77, No. 1-2, 04.2005, p. 81-88.

Research output: Contribution to journalArticle

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