Tetrafluorobromates for urban mining of noble metals: A case study on iridium metal

Sergey Ivlev, Patrick Woidy, Florian Kraus, Ivan Gerin, Roman Ostvald

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Abstract

Iridium is used as a hardening agent in several alloys and as a new-generation catalyst. Therefore, its recycling is a high-priority challenge. The reactions of various tetrafluorobromates MBrF₄ (M = K, Rb, Cs) and M′(BrF₄)₂ (M′ = Ba) with Ir metal were investigated in order to transform the latter to an easily soluble form to facilitate the further recovery of the noble metal. The compositions of the obtained products were determined, corresponding reaction schemes are suggested, and proper conditions for the reactions were established. The reactions of iridium metal with alkali and alkaline earth metals was studied by using X-ray powder diffraction and thermal analyses. The investigations show that the respective hexafluoridoiridates(IV) are obtained.

Original language	English
Pages (from-to)	4984-4987
Number of pages	4
Journal	European Journal of Inorganic Chemistry
Issue number	28
DOIs	https://doi.org/10.1002/ejic.201300618
Publication status	Published - 1 Oct 2013

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Keywords

Alkali metals
Alkaline earth metals
Iridium
Oxidative fluorination
Tetrafluorobromate
Thermal analysis
X-ray diffraction

ASJC Scopus subject areas

Inorganic Chemistry

Cite this

Ivlev, S., Woidy, P., Kraus, F., Gerin, I., & Ostvald, R. (2013). Tetrafluorobromates for urban mining of noble metals: A case study on iridium metal. European Journal of Inorganic Chemistry, (28), 4984-4987. https://doi.org/10.1002/ejic.201300618

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abstract = "Iridium is used as a hardening agent in several alloys and as a new-generation catalyst. Therefore, its recycling is a high-priority challenge. The reactions of various tetrafluorobromates MBrF4 (M = K, Rb, Cs) and M′(BrF4)2 (M′ = Ba) with Ir metal were investigated in order to transform the latter to an easily soluble form to facilitate the further recovery of the noble metal. The compositions of the obtained products were determined, corresponding reaction schemes are suggested, and proper conditions for the reactions were established. The reactions of iridium metal with alkali and alkaline earth metals was studied by using X-ray powder diffraction and thermal analyses. The investigations show that the respective hexafluoridoiridates(IV) are obtained.",

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AU - Ostvald, Roman

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KW - Alkali metals

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Access to Document

10.1002/ejic.201300618