Complexation-Distribution Separated Solvent Extraction Process Designed for Rapid and Efficient Recovery of Inert Platinum Group Metals
Zhiwei Zheng, Tsuyoshi Arai, Koichiro Takao
材料工学科
材料工学専攻
Previously, we have demonstrated that thermal-assisted techniques can accelerate the extraction of inert platinum group metals (PGMs), while they still have several concerns about difficulty of temperature control in actual extraction contactors and safety risks arising from heating organic solvents. In this study, we report a complexation-distribution separated extraction process for the accelerated extraction of inert PGMs. This extraction method includes two steps: (1) complexation of PGMs with extractants in aqueous solution and (2) distribution of the formed complex from the aqueous phase to organic one. We separately investigated the complexation and distribution processes for typical inert PGMs such as Ru(III) and Rh(III) in the presence of water-soluble N,N,N′,N′-tetra-alkylpyridinediamide ligands (PDA) and bis(trifluoromethylsulfonyl)amide (Tf2N-) counteranions. As a result, the water-soluble complexes of Ru(III) and Rh(III) with PDA can be formed in 0.5 M HNO3(aq) within 3 h under heating at 356 K. The formed complexes were extracted to the 1-octanol layer containing Tf2N- within 5 min at room temperature, where this hydrophobic anion plays an important role to promote extraction of PGMs as an anionic phase-transfer catalyst (PTC). Consequently, we successfully established and demonstrated the complexation-distribution separated extraction process for the accelerated extraction of inert PGMs using a water-soluble ligand and anionic PTC.
ACS Omega
https://doi.org/10.1021/acsomega.1c03565
化学 (全般)
化学工学(全般)
10.1021/acsomega.1c03565
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Complexation Engineering & Materials Science 100%
Solvent extraction Engineering & Materials Science 83%
Platinum-Group Metal Chemical Compounds 78%
Platinum Engineering & Materials Science 70%
Recovery Engineering & Materials Science 40%
Metals Engineering & Materials Science 38%
Phase-Transfer Catalyst Chemical Compounds 24%
Water Soluble Chemical Compounds 23%
Zheng, Z., Arai, T., & Takao, K. (2021). Complexation-Distribution Separated Solvent Extraction Process Designed for Rapid and Efficient Recovery of Inert Platinum Group Metals. ACS Omega, 6(33), 21809-21818. https://doi.org/10.1021/acsomega.1c03565
Complexation-Distribution Separated Solvent Extraction Process Designed for Rapid and Efficient Recovery of Inert Platinum Group Metals. / Zheng, Zhiwei; Arai, Tsuyoshi; Takao, Koichiro.
In: ACS Omega, Vol. 6, No. 33, 24.08.2021, p. 21809-21818.
Zheng, Z, Arai, T & Takao, K 2021, 'Complexation-Distribution Separated Solvent Extraction Process Designed for Rapid and Efficient Recovery of Inert Platinum Group Metals', ACS Omega, vol. 6, no. 33, pp. 21809-21818. https://doi.org/10.1021/acsomega.1c03565
Zheng Z, Arai T, Takao K. Complexation-Distribution Separated Solvent Extraction Process Designed for Rapid and Efficient Recovery of Inert Platinum Group Metals. ACS Omega. 2021 8月 24;6(33):21809-21818. doi: 10.1021/acsomega.1c03565
Zheng, Zhiwei ; Arai, Tsuyoshi ; Takao, Koichiro. / Complexation-Distribution Separated Solvent Extraction Process Designed for Rapid and Efficient Recovery of Inert Platinum Group Metals. In: ACS Omega. 2021 ; Vol. 6, No. 33. pp. 21809-21818.
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title = "Complexation-Distribution Separated Solvent Extraction Process Designed for Rapid and Efficient Recovery of Inert Platinum Group Metals",
abstract = "Previously, we have demonstrated that thermal-assisted techniques can accelerate the extraction of inert platinum group metals (PGMs), while they still have several concerns about difficulty of temperature control in actual extraction contactors and safety risks arising from heating organic solvents. In this study, we report a complexation-distribution separated extraction process for the accelerated extraction of inert PGMs. This extraction method includes two steps: (1) complexation of PGMs with extractants in aqueous solution and (2) distribution of the formed complex from the aqueous phase to organic one. We separately investigated the complexation and distribution processes for typical inert PGMs such as Ru(III) and Rh(III) in the presence of water-soluble N,N,N′,N′-tetra-alkylpyridinediamide ligands (PDA) and bis(trifluoromethylsulfonyl)amide (Tf2N-) counteranions. As a result, the water-soluble complexes of Ru(III) and Rh(III) with PDA can be formed in 0.5 M HNO3(aq) within 3 h under heating at 356 K. The formed complexes were extracted to the 1-octanol layer containing Tf2N- within 5 min at room temperature, where this hydrophobic anion plays an important role to promote extraction of PGMs as an anionic phase-transfer catalyst (PTC). Consequently, we successfully established and demonstrated the complexation-distribution separated extraction process for the accelerated extraction of inert PGMs using a water-soluble ligand and anionic PTC. ",
author = "Zhiwei Zheng and Tsuyoshi Arai and Koichiro Takao",
note = "Publisher Copyright: {\textcopyright} 2021 The Authors. Published by American Chemical Society.",
doi = "10.1021/acsomega.1c03565",
journal = "ACS Omega",
T1 - Complexation-Distribution Separated Solvent Extraction Process Designed for Rapid and Efficient Recovery of Inert Platinum Group Metals
AU - Zheng, Zhiwei
AU - Arai, Tsuyoshi
AU - Takao, Koichiro
N1 - Publisher Copyright: © 2021 The Authors. Published by American Chemical Society.
N2 - Previously, we have demonstrated that thermal-assisted techniques can accelerate the extraction of inert platinum group metals (PGMs), while they still have several concerns about difficulty of temperature control in actual extraction contactors and safety risks arising from heating organic solvents. In this study, we report a complexation-distribution separated extraction process for the accelerated extraction of inert PGMs. This extraction method includes two steps: (1) complexation of PGMs with extractants in aqueous solution and (2) distribution of the formed complex from the aqueous phase to organic one. We separately investigated the complexation and distribution processes for typical inert PGMs such as Ru(III) and Rh(III) in the presence of water-soluble N,N,N′,N′-tetra-alkylpyridinediamide ligands (PDA) and bis(trifluoromethylsulfonyl)amide (Tf2N-) counteranions. As a result, the water-soluble complexes of Ru(III) and Rh(III) with PDA can be formed in 0.5 M HNO3(aq) within 3 h under heating at 356 K. The formed complexes were extracted to the 1-octanol layer containing Tf2N- within 5 min at room temperature, where this hydrophobic anion plays an important role to promote extraction of PGMs as an anionic phase-transfer catalyst (PTC). Consequently, we successfully established and demonstrated the complexation-distribution separated extraction process for the accelerated extraction of inert PGMs using a water-soluble ligand and anionic PTC.
AB - Previously, we have demonstrated that thermal-assisted techniques can accelerate the extraction of inert platinum group metals (PGMs), while they still have several concerns about difficulty of temperature control in actual extraction contactors and safety risks arising from heating organic solvents. In this study, we report a complexation-distribution separated extraction process for the accelerated extraction of inert PGMs. This extraction method includes two steps: (1) complexation of PGMs with extractants in aqueous solution and (2) distribution of the formed complex from the aqueous phase to organic one. We separately investigated the complexation and distribution processes for typical inert PGMs such as Ru(III) and Rh(III) in the presence of water-soluble N,N,N′,N′-tetra-alkylpyridinediamide ligands (PDA) and bis(trifluoromethylsulfonyl)amide (Tf2N-) counteranions. As a result, the water-soluble complexes of Ru(III) and Rh(III) with PDA can be formed in 0.5 M HNO3(aq) within 3 h under heating at 356 K. The formed complexes were extracted to the 1-octanol layer containing Tf2N- within 5 min at room temperature, where this hydrophobic anion plays an important role to promote extraction of PGMs as an anionic phase-transfer catalyst (PTC). Consequently, we successfully established and demonstrated the complexation-distribution separated extraction process for the accelerated extraction of inert PGMs using a water-soluble ligand and anionic PTC.
U2 - 10.1021/acsomega.1c03565
DO - 10.1021/acsomega.1c03565
JO - ACS Omega
JF - ACS Omega