Speciation of rhenium in chloride melts: Spectroscopic and electrochemical study / Danilov D.A., Volkovich V.A., Vasin B.D., Aleksandrov D.E., Polovov I.B., Griffiths T.R. // Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences. - 2008. - V. 63, l. 5-6. - P. 371-376.

ISSN:

09320784

Type:

Article

Abstract:

Speciation of rhenium in high-temperature alkali chloride-based melts was studied using electronic absorption and IR spectroscopy of molten salts and diffuse reflectance spectroscopy of quenched melts. Rhenium was added to the melts by anodic dissolution of the metal (at anodic current densities of 0.005-0.05 A/cm2), by reacting Re and ReO2 with Cl 2 and HCl, and by dissolving K2[ReCl6]. The melts included 3LiCl-2KCl and NaCl-2CsCl eutectics, an NaCl-KCl equimolar mixture, and pure NaCl, KCl and CsCl between 450 and 850 °C. Rhenium was present in the melts as Re(IV) hexachloro-ions, [ReCl6]2-; no evidence of species containing rhenium in oxidation states below four was obtained. The kinetics of [ReCl6]2- disproportionation in molten alkali chlorides were investigated, and the IR spectra of [ReO 4]- ions in molten CsCl-CsI and CsI were measured for the first time. © 2008 Verlag der Zeitschrift für Naturforschung, Tübingen.

Author keywords:

Chloride melts; Electronic absorption spectroscopy; Rhenium; Rhenium chlorides

Index keywords:

нет данных

DOI:

нет данных

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https://www.scopus.com/inward/record.uri?eid=2-s2.0-47149112548&partnerID=40&md5=9b2525f7aaa4b96eb4aa8760a14c399d

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-47149112548&partnerID=40&md5=9b2525f7aaa4b96eb4aa8760a14c399d
Affiliations	Department of Rare Metals, Ural State Technical University, 620002 Ekaterinburg, Russian Federation; Redston Trevor Consulting Limited, Leeds, LS17 8RF, United Kingdom
Author Keywords	Chloride melts; Electronic absorption spectroscopy; Rhenium; Rhenium chlorides
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Correspondence Address	Volkovich, V.A.; Department of Rare Metals, Ural State Technical University, 620002 Ekaterinburg, Russian Federation; email: volkovich@dpt.ustu.ru
Language of Original Document	English
Abbreviated Source Title	Z. Naturforsch. Sect. A J. Phys. Sci.
Source	Scopus