Recovery of ruthenium from a solution containing platinum group metals

Hifumi Nagai; Etsuro Shibata; Takashi Nakamura

doi:10.2320/jinstmet.JE201606

Recovery of ruthenium from a solution containing platinum group metals

Hifumi Nagai, Etsuro Shibata, Takashi Nakamura

Institute of Multidisciplinary Research for Advanced Materials (IMRAM)

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The oxidation-distillation method was used to separate ruthenium (Ru) from a solution containing platinum group metals. In this method, Ru was oxidized to ruthenium tetraoxide (RuO₄). The RuO₄ was then distilled and recovered from a hydrochloric acid (HCl) solution. In this study, sodium bromate (NaBrO₃) was used as the oxidizer, and the amount of NaBrO₃ needed to convert Ru to RuO₄ was investigated. The Ru in the HCl solution was precipitated as an ammonium ruthenium complex salt by addition of ammonium chloride (NH₄Cl) under various conditions and temperatures. The relationship between the precipitation conditions and the properties of the precipitated salts was investigated. The purity of the Ru powder, obtained by pyrolysis of the precipitated salt, was also analyzed.

Original language	English
Pages (from-to)	178-185
Number of pages	8
Journal	Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume	81
Issue number	4
DOIs	https://doi.org/10.2320/jinstmet.JE201606
Publication status	Published - 2017

Keywords

Ammonium ruthenium complex salt
Extended X-ray absorption fine structure
Oxidation-distillation
Platinum group metals
Recycling
Ruthenium

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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10.2320/jinstmet.JE201606

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title = "Recovery of ruthenium from a solution containing platinum group metals",

abstract = "The oxidation-distillation method was used to separate ruthenium (Ru) from a solution containing platinum group metals. In this method, Ru was oxidized to ruthenium tetraoxide (RuO4). The RuO4 was then distilled and recovered from a hydrochloric acid (HCl) solution. In this study, sodium bromate (NaBrO3) was used as the oxidizer, and the amount of NaBrO3 needed to convert Ru to RuO4 was investigated. The Ru in the HCl solution was precipitated as an ammonium ruthenium complex salt by addition of ammonium chloride (NH4Cl) under various conditions and temperatures. The relationship between the precipitation conditions and the properties of the precipitated salts was investigated. The purity of the Ru powder, obtained by pyrolysis of the precipitated salt, was also analyzed.",

keywords = "Ammonium ruthenium complex salt, Extended X-ray absorption fine structure, Oxidation-distillation, Platinum group metals, Recycling, Ruthenium",

author = "Hifumi Nagai and Etsuro Shibata and Takashi Nakamura",

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AU - Shibata, Etsuro

AU - Nakamura, Takashi

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N2 - The oxidation-distillation method was used to separate ruthenium (Ru) from a solution containing platinum group metals. In this method, Ru was oxidized to ruthenium tetraoxide (RuO4). The RuO4 was then distilled and recovered from a hydrochloric acid (HCl) solution. In this study, sodium bromate (NaBrO3) was used as the oxidizer, and the amount of NaBrO3 needed to convert Ru to RuO4 was investigated. The Ru in the HCl solution was precipitated as an ammonium ruthenium complex salt by addition of ammonium chloride (NH4Cl) under various conditions and temperatures. The relationship between the precipitation conditions and the properties of the precipitated salts was investigated. The purity of the Ru powder, obtained by pyrolysis of the precipitated salt, was also analyzed.

AB - The oxidation-distillation method was used to separate ruthenium (Ru) from a solution containing platinum group metals. In this method, Ru was oxidized to ruthenium tetraoxide (RuO4). The RuO4 was then distilled and recovered from a hydrochloric acid (HCl) solution. In this study, sodium bromate (NaBrO3) was used as the oxidizer, and the amount of NaBrO3 needed to convert Ru to RuO4 was investigated. The Ru in the HCl solution was precipitated as an ammonium ruthenium complex salt by addition of ammonium chloride (NH4Cl) under various conditions and temperatures. The relationship between the precipitation conditions and the properties of the precipitated salts was investigated. The purity of the Ru powder, obtained by pyrolysis of the precipitated salt, was also analyzed.

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Recovery of ruthenium from a solution containing platinum group metals

Abstract

Keywords

ASJC Scopus subject areas

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