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

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

Keywords

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

ASJC Scopus subject areas

Inorganic Chemistry

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10.1002/ejic.201300618

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title = "Tetrafluorobromates for urban mining of noble metals: A case study on iridium metal",

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.",

keywords = "Alkali metals, Alkaline earth metals, Iridium, Oxidative fluorination, Tetrafluorobromate, Thermal analysis, X-ray diffraction",

author = "Sergey Ivlev and Patrick Woidy and Florian Kraus and Ivan Gerin and Roman Ostvald",

year = "2013",

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doi = "10.1002/ejic.201300618",

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T1 - Tetrafluorobromates for urban mining of noble metals

T2 - A case study on iridium metal

AU - Ivlev, Sergey

AU - Woidy, Patrick

AU - Kraus, Florian

AU - Gerin, Ivan

AU - Ostvald, Roman

PY - 2013/10/1

Y1 - 2013/10/1

N2 - 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.

AB - 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.

KW - Alkali metals

KW - Alkaline earth metals

KW - Iridium

KW - Oxidative fluorination

KW - Tetrafluorobromate

KW - Thermal analysis

KW - X-ray diffraction

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