文献类型：期刊文献

英文题名：Recovery of lithium from salt-lake brine by liquid-liquid extraction using TBP-FeCl3 based mixture solvent

作者：Qiao, Linju[1,2,3];Chen, Hang[1,2,3];Yu, Jianguo[1,2,3]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Resource Proc Engn, Minist Educ, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Joint Int Lab Potassium & Lithium Strateg Resourc, Shanghai, Peoples R China

年份：2023

卷号：101

期号：4

起止页码：2139

外文期刊名：CANADIAN JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20223612680293);WOS:【SCI-EXPANDED(收录号:WOS:000847506200001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 22078101; Shanghai Chen Guang project, Grant/Award Number: 19CG34

语种：英文

外文关键词：extraction efficiency; high lithium brine; separation factor; solvent extraction

摘要：In this study, a complete cyclic process was developed for the lithium extraction from high-concentration salt-lake brine by using a high flash point, low water solubility, and low toxicity diluent mixed with the TBP-FeCl3-based organic solvent. The process was composed of four sections, including extraction, scrubbing, stripping, and regeneration. The optimal conditions for each section were determined first. Then, a 13-stage cyclic extraction process was designed and validated experimentally for the high lithium concentration brine, which reached 8.612 g/L. By using the diluent at the optimized conditions, the overall recovery of lithium was higher than 96%. The stripping liquid contained 38.87 g/L Li+, while all the ratios of impurities of sodium, potassium, and magnesium to lithium were less than 0.1. The aims of enrichment and purification of Li+ from the complicated brine system were achieved by the developed extraction process with little Fe loss, which provided the technical support for the development of the salt-lake lithium resource.