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Combining Selective Extraction and Easy Stripping of Lithium Using a Ternary Synergistic Solvent Extraction System through Regulation of Fe3+ Coordination

文献类型：期刊论文

作者Su, Hui2,3,4; Li, Zheng5; Zhang, Jian2,3,4; Liu, Wensen1; Zhu, Zhaowu2,3; Wang, Lina2,3; Qi, Tao2,3
刊名ACS SUSTAINABLE CHEMISTRY & ENGINEERING
出版日期2020-02-03
卷号8期号:4页码:1971-1979
关键词Ternary solvent extraction Lithium TBP P507 Stripping
ISSN号2168-0485
DOI10.1021/acssuschemeng.9b06432
英文摘要Lithium is becoming increasingly important due to its essential role in lithium-ion batteries. Over 70% of the global lithium resources are found in salt lake brines, where lithium is always accompanied by magnesium. The system of TBP (tributyl phosphate)/FeCl3 has been widely studied for selective lithium extraction from high Mg-containing salt lake brines. However, the system requires a high concentration of HCl for lithium stripping, which causes equipment corrosion, consumes large amounts of reagents, and requires careful neutralization of the organic phase for regeneration. In this study, we develop a novel ternary synergistic solvent extraction system of TBP/FeCl3/P507 (P507 is 2-ethylhexyl phosphonic acid mono 2-ethylhexyl) to significantly enhance the stripping of lithium while largely maintaining lithium extraction capacity. During lithium extraction from Mg-containing solutions, TBP and FeCl3 coordinate with lithium in the form of Li center dot 2TBP center dot FeCl4, while P507 is not involved in the coordination. When the loaded organic phase is contacted with water, P507 and TBP synergistically coordinate with Fe3+ in the form of FeCl2L center dot(HL)center dot 2TBP (HL denotes P507), leading to efficient stripping of lithium due to the breaking of the coordination structure of Li center dot 2TBP center dot FeCl4, and Fe3+ is maintained in the organic phase for the next extraction cycle. The efficient stripping of lithium using only water, instead of high concentration HCl, is a key step forward toward the sustainable extraction of lithium from brines.
WOS关键词SALT LAKE BRINE ; TRIBUTYL-PHOSPHATE ; HYDROCHLORIC-ACID ; ENERGY-STORAGE ; RECOVERY ; ION ; SEPARATION ; FECL3 ; RAMAN ; MAGNESIUM
资助项目National Key R&D Program of China[2018YFC1900500] ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences[QYZDJ-SSW-JSCO21] ; National Natural Science Foundation of China[51774260] ; National Natural Science Foundation of China[51804289] ; National Natural Science Foundation of China[51904286] ; National Natural Science Foundation of China[21908231] ; CAS Interdisciplinary Innovation Team ; Senior FWO Postdoctoral Fellowship[181203/12Z1920N]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Engineering
语种英语
WOS记录号WOS:000511244200031
出版者AMER CHEMICAL SOC
资助机构National Key R&D Program of China ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences ; National Natural Science Foundation of China ; CAS Interdisciplinary Innovation Team ; Senior FWO Postdoctoral Fellowship
源URL[http://ir.ipe.ac.cn/handle/122111/39243]  
专题中国科学院过程工程研究所
通讯作者Zhu, Zhaowu; Qi, Tao
作者单位1.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
2.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 101408, Peoples R China
5.Katholieke Univ Leuven, Dept Chem, Celestijnenlaan 200 F, B-3001 Heverlee, Belgium
推荐引用方式
GB/T 7714		 Su, Hui,Li, Zheng,Zhang, Jian,et al. Combining Selective Extraction and Easy Stripping of Lithium Using a Ternary Synergistic Solvent Extraction System through Regulation of Fe3+ Coordination[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2020,8(4):1971-1979.
APA Su, Hui.,Li, Zheng.,Zhang, Jian.,Liu, Wensen.,Zhu, Zhaowu.,...&Qi, Tao.(2020).Combining Selective Extraction and Easy Stripping of Lithium Using a Ternary Synergistic Solvent Extraction System through Regulation of Fe3+ Coordination.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,8(4),1971-1979.
MLA Su, Hui,et al."Combining Selective Extraction and Easy Stripping of Lithium Using a Ternary Synergistic Solvent Extraction System through Regulation of Fe3+ Coordination".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 8.4(2020):1971-1979.

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来源：过程工程研究所

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