中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Selective separation of lithium from the high magnesium brine by the extraction system containing phosphate-based ionic liquids

文献类型:期刊论文

作者Bai, Ruibing1,2,3; Wang, Junfeng1,2; Wang, Daoguang1,2; Zhang, Yanqiang1,2; Cui, Junjie1,2
刊名SEPARATION AND PURIFICATION TECHNOLOGY
出版日期2021-11-01
卷号274页码:11
ISSN号1383-5866
关键词Ionic liquid Solvent extraction Lithium Stripping High Mg brine
DOI10.1016/j.seppur.2021.119051
英文摘要The high acidity of stripping is one of the major problems that hinder the industrialization of the tributyl phosphate (TBP) + FeCl3 system for lithium extraction from the salt lake brines with high Mg/Li ratio. In this study, a novel solvent extraction system, trialkylmethylammonium di(2-ethylhexyl)orthophosphinate ([N1888] [P507]) + TBP + FeCl3, was developed to significantly reduce the difficulty of stripping and simplify the extraction process. The conditions of extraction and stripping were systematically studied in the present work. The results showed that Li+ extraction efficiency could reach 61% under the optimal extraction parameters and Li+ stripping ratio was 90% with a relative mild conditions of O/A = 10:1, [HCl]aq = 1.5 mol.L-1. Also, combined with experimental results, FT-IR analysis, and UV analysis, the possible mechanisms of lithium extraction and stripping were put forward. Li+ was extracted from the aqueous phase through the formation of [Li.2TBP][FeCl4] adduct, meanwhile [N1888][P507] was just slightly involved in the extraction step. In the stripping procedure, the interaction between [FeCl4]- and [Li.2TBP]+ might be destroyed, and new possible complexes, [Li.2TBP]+, and [FeCl4.TBP.P507]2-/[FeCl4.P507]2- were formed in the organic phase. Additionally, the extraction efficiency of Li+ remained above 70% while the organic phase was reused for six cycles. Compared with the traditional system, the addition of [N1888][P507] resulted in a slight decrease of Li+ extraction efficiency (about 5%), the stripping acidity significantly reduced from 6 mol.L-1 HCl to 1.5 mol.L-1 HCl. This new extraction system showed a promising performance in selective extracting and easy stripping in lithium separation from the salt lake brines with high Mg/Li ratio.
WOS关键词SALT LAKE BRINE ; SOLVENT-EXTRACTION ; RATIO BRINES ; RECOVERY ; KEROSENE
资助项目National Natural Science Foundation of China[21978302] ; National Natural Science Foundation of China[U20A20149] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM2020DB05] ; State Key Laboratory of Multiphase Complex Systems[MPCS2019D15]
WOS研究方向Engineering
语种英语
出版者ELSEVIER
WOS记录号WOS:000668929400008
资助机构National Natural Science Foundation of China ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; State Key Laboratory of Multiphase Complex Systems
源URL[http://ir.ipe.ac.cn/handle/122111/49403]  
专题中国科学院过程工程研究所
通讯作者Wang, Junfeng
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Bai, Ruibing,Wang, Junfeng,Wang, Daoguang,et al. Selective separation of lithium from the high magnesium brine by the extraction system containing phosphate-based ionic liquids[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2021,274:11.
APA Bai, Ruibing,Wang, Junfeng,Wang, Daoguang,Zhang, Yanqiang,&Cui, Junjie.(2021).Selective separation of lithium from the high magnesium brine by the extraction system containing phosphate-based ionic liquids.SEPARATION AND PURIFICATION TECHNOLOGY,274,11.
MLA Bai, Ruibing,et al."Selective separation of lithium from the high magnesium brine by the extraction system containing phosphate-based ionic liquids".SEPARATION AND PURIFICATION TECHNOLOGY 274(2021):11.

入库方式: OAI收割

来源:过程工程研究所

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