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Kinetic and Thermodynamic Requirements to Extend Solvent Compatibility in Thermal-Assisted Extraction of Inert Platinum Group Metals
Zhiwei Zheng, Tsuyoshi Arai, Koichiro Takao
Regional Environment Systems
The extraction behavior of inert platinum group metals (PGMs) like Ru(III) and Rh(III) has been investigated in a HNO3(aq)/1-octanol system with a pyridinediamide. As a result, low efficiency of Ru(III) extraction arose from its slow kinetics at 298 K, while the situation was not improved very much even at 356 K. Addition of a hydrophobic anion like Tf2N- increased Ru(III) extraction up to 95% within 3 h at 356 K, where a synergistic effect would be present. Extraction of a more inert PGM like Rh(III) was also enhanced up to 90% within 2 h at 356 K in the presence of Tf2N-. We have successfully demonstrated the rapid and efficient extraction of inert PGMs from HNO3(aq) to 1-octanol, which is one of the ordinary organic solvents.
ACS Sustainable Chemistry and Engineering
https://doi.org/10.1021/acssuschemeng.9b01622
Published - 2019 Jun 3
Hydrophobic anion
Ordinary organic solvent
Thermal-assistance
10.1021/acssuschemeng.9b01622
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platinum group Earth & Environmental Sciences 100%
Platinum-Group Metal Chemical Compounds 98%
Platinum Engineering & Materials Science 88%
Thermodynamics Engineering & Materials Science 64%
thermodynamics Earth & Environmental Sciences 58%
Metals Engineering & Materials Science 48%
kinetics Earth & Environmental Sciences 46%
metal Earth & Environmental Sciences 44%
Zheng, Z., Arai, T., & Takao, K. (2019). Kinetic and Thermodynamic Requirements to Extend Solvent Compatibility in Thermal-Assisted Extraction of Inert Platinum Group Metals. ACS Sustainable Chemistry and Engineering, 7(11), 9750-9753. https://doi.org/10.1021/acssuschemeng.9b01622
Kinetic and Thermodynamic Requirements to Extend Solvent Compatibility in Thermal-Assisted Extraction of Inert Platinum Group Metals. / Zheng, Zhiwei; Arai, Tsuyoshi; Takao, Koichiro.
In: ACS Sustainable Chemistry and Engineering, Vol. 7, No. 11, 03.06.2019, p. 9750-9753.
Zheng, Z, Arai, T & Takao, K 2019, 'Kinetic and Thermodynamic Requirements to Extend Solvent Compatibility in Thermal-Assisted Extraction of Inert Platinum Group Metals', ACS Sustainable Chemistry and Engineering, vol. 7, no. 11, pp. 9750-9753. https://doi.org/10.1021/acssuschemeng.9b01622
Zheng Z, Arai T, Takao K. Kinetic and Thermodynamic Requirements to Extend Solvent Compatibility in Thermal-Assisted Extraction of Inert Platinum Group Metals. ACS Sustainable Chemistry and Engineering. 2019 Jun 3;7(11):9750-9753. https://doi.org/10.1021/acssuschemeng.9b01622
Zheng, Zhiwei ; Arai, Tsuyoshi ; Takao, Koichiro. / Kinetic and Thermodynamic Requirements to Extend Solvent Compatibility in Thermal-Assisted Extraction of Inert Platinum Group Metals. In: ACS Sustainable Chemistry and Engineering. 2019 ; Vol. 7, No. 11. pp. 9750-9753.
@article{6af8228578eb462e935fc942d24fdd2a,
title = "Kinetic and Thermodynamic Requirements to Extend Solvent Compatibility in Thermal-Assisted Extraction of Inert Platinum Group Metals",
abstract = "The extraction behavior of inert platinum group metals (PGMs) like Ru(III) and Rh(III) has been investigated in a HNO3(aq)/1-octanol system with a pyridinediamide. As a result, low efficiency of Ru(III) extraction arose from its slow kinetics at 298 K, while the situation was not improved very much even at 356 K. Addition of a hydrophobic anion like Tf2N- increased Ru(III) extraction up to 95% within 3 h at 356 K, where a synergistic effect would be present. Extraction of a more inert PGM like Rh(III) was also enhanced up to 90% within 2 h at 356 K in the presence of Tf2N-. We have successfully demonstrated the rapid and efficient extraction of inert PGMs from HNO3(aq) to 1-octanol, which is one of the ordinary organic solvents.",
keywords = "Hydrophobic anion, Ordinary organic solvent, Platinum group metals, Solvent extraction, Thermal-assistance",
author = "Zhiwei Zheng and Tsuyoshi Arai and Koichiro Takao",
doi = "10.1021/acssuschemeng.9b01622",
journal = "ACS Sustainable Chemistry and Engineering",
T1 - Kinetic and Thermodynamic Requirements to Extend Solvent Compatibility in Thermal-Assisted Extraction of Inert Platinum Group Metals
AU - Zheng, Zhiwei
AU - Arai, Tsuyoshi
AU - Takao, Koichiro
N2 - The extraction behavior of inert platinum group metals (PGMs) like Ru(III) and Rh(III) has been investigated in a HNO3(aq)/1-octanol system with a pyridinediamide. As a result, low efficiency of Ru(III) extraction arose from its slow kinetics at 298 K, while the situation was not improved very much even at 356 K. Addition of a hydrophobic anion like Tf2N- increased Ru(III) extraction up to 95% within 3 h at 356 K, where a synergistic effect would be present. Extraction of a more inert PGM like Rh(III) was also enhanced up to 90% within 2 h at 356 K in the presence of Tf2N-. We have successfully demonstrated the rapid and efficient extraction of inert PGMs from HNO3(aq) to 1-octanol, which is one of the ordinary organic solvents.
AB - The extraction behavior of inert platinum group metals (PGMs) like Ru(III) and Rh(III) has been investigated in a HNO3(aq)/1-octanol system with a pyridinediamide. As a result, low efficiency of Ru(III) extraction arose from its slow kinetics at 298 K, while the situation was not improved very much even at 356 K. Addition of a hydrophobic anion like Tf2N- increased Ru(III) extraction up to 95% within 3 h at 356 K, where a synergistic effect would be present. Extraction of a more inert PGM like Rh(III) was also enhanced up to 90% within 2 h at 356 K in the presence of Tf2N-. We have successfully demonstrated the rapid and efficient extraction of inert PGMs from HNO3(aq) to 1-octanol, which is one of the ordinary organic solvents.
KW - Hydrophobic anion
KW - Ordinary organic solvent
KW - Platinum group metals
KW - Solvent extraction
KW - Thermal-assistance
U2 - 10.1021/acssuschemeng.9b01622
DO - 10.1021/acssuschemeng.9b01622
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering