Liquid-liquid extraction to lithium isotope separation based on room-temperature ionic liquids containing 2,2‚binaphthyldiyl-17-crown-5
Open accessAbstract
A novel liquid–liquid extraction system was investigated for the selective separation of lithium isotopes using ionic liquids (ILs = C8mim+PF6−, C8mim+BF4−, and C8mim+NTf2−) as extraction solvent and 2,2′-binaphthyldiyl-17-crown-5 (BN-17-5) as extractant. The effects of the concentration of lithium salt, counter anion of lithium salt, initial pH of aqueous phase, extraction temperature, and time on the lithium isotopes separation were discussed. Under optimized conditions, the maximum single-stage separation factor α of 6Li/7Li obtained in the present study was 1.046 ± 0.002, indicating the lighter isotope 6Li was enriched in IL phase while the heavier isotope 7Li was concentrated in the solution phase. The formation of 1:1 complex Li(BN-17-5)+ in the IL phase was determined on the basis of slope analysis method. The large value of the free energy change (−ΔG° = 92.89 J mol−1) indicated the high separation capability of the Li isotopes by BN-17-5/IL system. Lithium in Li(BN-17-5)+ complex was stripped by 1 mol L−1 HCl solution. The extraction system offers high efficiency, simplicity, and green application prospect to lithium isotope separation.
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Systems employing ILs such as C8mim+PF6- combined with BN-17-5 allow for the enrichment of 6Li in the organic phase.
“Systems employing ILs, such as C8mim+PF6-, combined with agents, such as 2,2 ′ -binaphthyldiyl-17-crown-5 (BN-17-5), allow for the enrichment of 6 Li in the organic phase.”
From Pathways to Greener Primary Lithium Extraction for a Really Sustainable Energy Transition: Environmental Challenges and Pioneering Innovations (2024) · cites this paper as [165]
This method achieves a separation factor of 1.046 ± 0.002.
“This method achieves a separation factor of 1.046 ± 0.002, demonstrating its high efficiency in isotope extraction [165].”
From Pathways to Greener Primary Lithium Extraction for a Really Sustainable Energy Transition: Environmental Challenges and Pioneering Innovations (2024) · cites this paper as [165]
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Ruberti, M. (2024) · Sustainability · doi:10.3390/su17010160 · Cited by 28 · see citing works
- Authors
- Sun, X.-L., Zhou, W., Gu, L., Qiu, D., Ren, D.-H., Gu, Z.-G., & Li, Z.
- Affiliations
- Jiangnan University (CN)
- Corresponding author
- Gu, Zhi-Guo
- Venue
- Journal of Nuclear Science and Technology
- Publisher
- Informa UK Limited
- Published
- 2014-08-13
- Volume
- 52
- Issue
- 3
- Pages
- 332-341
- ISSN
- 0022-3131 (ISSN-L)
- 1881-1248
- OpenAlex
- W2048317341
- Cited by
- 43
- References
- 30
- Citations by year
- 2026: 1 · 2025: 6 · 2024: 9 · 2023: 6 · 2022: 3 · 2021: 5 · 2020: 5 · 2019: 2 · 2018: 4 · 2016: 2
- FWCI
- 0.78
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Nuclear Science and Technology (publishedVersion)
- Funders
- National Natural Science Foundation of China (21101078, 21176101, 21276105)
- Government of Jiangsu Province
- Natural Science Foundation of Jiangsu Province (BK2011143)
- Program for New Century Excellent Talents in University
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Extraction and Separation Processes
- Physical Sciences › Chemistry › Inorganic Chemistry › Radioactive element chemistry and processing
- Physical Sciences › Chemistry › Analytical Chemistry › Analytical chemistry methods development
- Keywords
- lithium isotope separation, liquid-liquid extraction, room temperature ionic liquids, lithium complexation, counterion effects, lithium stripping, green extraction
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