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 language | English |
|---|---|
| Pages (from-to) | 1555-1559 |
| Number of pages | 5 |
| Journal | ACS Sustainable Chemistry and Engineering |
| Volume | 6 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2018 Feb 5 |
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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 journal › Article
}
TY - JOUR
T1 - Significant Acceleration of PGMs Extraction with UCST-Type Thermomorphic Ionic Liquid at Elevated Temperature
AU - Kono, Soma
AU - Kazama, Hiroyuki
AU - Mori, Takahiro
AU - Arai, Tsuyoshi
AU - Takao, Koichiro
PY - 2018/2/5
Y1 - 2018/2/5
N2 - 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.
AB - 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.
KW - Betainium
KW - Ionic liquid
KW - Platinum group
KW - Solvent extraction
KW - Thermomorphism
KW - Upper critical solution temperature
UR - http://www.scopus.com/inward/record.url?scp=85041470090&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85041470090&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.7b04447
DO - 10.1021/acssuschemeng.7b04447
M3 - Article
VL - 6
SP - 1555
EP - 1559
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
SN - 2168-0485
IS - 2
ER -