Significant Acceleration of PGMs Extraction with UCST-Type Thermomorphic Ionic Liquid at Elevated Temperature

Soma Kono, Hiroyuki Kazama, Takahiro Mori, Tsuyoshi Arai, Koichiro Takao

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Dependency of extraction behavior of inert platinum group metals (PGMs) like Ru(III) and Rh(III) on temperature has been investigated in a biphasic system consisting of HNO3(aq) and betainium bis(trifluoromethylsulfonyl)amide ([Hbet][Tf2N]) ionic liquid. The extraction reactions of Ru(III) and Rh(III) took 3.5 days and 113 days, respectively, at 298 K, while equilibrated within 1 and 3 h to reach 99.2% and 96.5% extraction at 353 K. Further mechanistic studies clarified that the complexation of these PGMs and [Hbet]+ is rate-determining in their extraction and that it is successfully accelerated and enhanced by elevating the temperature.

Original languageEnglish
Pages (from-to)1555-1559
Number of pages5
JournalACS Sustainable Chemistry and Engineering
Volume6
Issue number2
DOIs
Publication statusPublished - 2018 Feb 5

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Ionic Liquids
Platinum
platinum
Ionic liquids
Metals
metal
temperature
Temperature
Complexation
Amides
complexation
ionic liquid

Keywords

  • Betainium
  • Ionic liquid
  • Platinum group
  • Solvent extraction
  • Thermomorphism
  • Upper critical solution temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

Cite this

Significant Acceleration of PGMs Extraction with UCST-Type Thermomorphic Ionic Liquid at Elevated Temperature. / Kono, Soma; Kazama, Hiroyuki; Mori, Takahiro; Arai, Tsuyoshi; Takao, Koichiro.

In: ACS Sustainable Chemistry and Engineering, Vol. 6, No. 2, 05.02.2018, p. 1555-1559.

Research output: Contribution to journalArticle

Kono, Soma ; Kazama, Hiroyuki ; Mori, Takahiro ; Arai, Tsuyoshi ; Takao, Koichiro. / Significant Acceleration of PGMs Extraction with UCST-Type Thermomorphic Ionic Liquid at Elevated Temperature. In: ACS Sustainable Chemistry and Engineering. 2018 ; Vol. 6, No. 2. pp. 1555-1559.
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