文献类型：期刊文献

英文题名：Selective lithium recovery from lithium precipitation mother liquor by using a diketone-based solvent

作者：Zhao, Jixing[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 200237, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Resource Proc Engn, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Joint Int Lab Potassium & Lithium Strateg Resourc, Shanghai 200237, Peoples R China

年份：2024

卷号：591

外文期刊名：DESALINATION

收录：;EI(收录号：20243316882816);WOS:【SCI-EXPANDED(收录号:WOS:001297520700001)】；

基金：We would like to acknowledge the financial support from the National Natural Science Foundation of China 22078101, Shanghai Rising-Star Program supported by Science and Technology Commission of Shanghai Municipality (23QA1402000) , "Chen Guang" project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation (19CG34) .

语种：英文

外文关键词：Lithium recovery; High Na/Li ratio; Solvent extraction; Lithium precipitation mother liquor; beta-Diketone

摘要：Lithium recovery from lithium precipitation mother liquor is an important point for improving lithium resource utilization efficiency. In this study, a modified beta-diketone based organic solvent was developed. DBM was selected as extractant, which has the advantage of low cost compared to fluor-diketones. Organic phosphate TBP was used instead of traditional alkylphosphine oxide as co-extractant. The results show that TBP has the ability to inhabit the extraction of sodium so that it is positive for separation factor of lithium to sodium. Simultaneously, TBP plays the role of diluent, thus improving two-phase separation performance significantly. The phase separation time is only tens of seconds, which is much less than that of alkylphosphine oxide co-extraction system. Besides, low cost and low viscosity properties of TBP avoid the limitation of additive amount, which means that it has the industrial feasibility to improve the extraction performance by increasing TBP concentration. The developed extraction solvent has the combination sequence of H+ > > Li+ > > Na+. By using optimized solvent of 0.4 mol/L DBM and 1.2 mol/L TBP dissolved in sulfonated kerosene, single-stage lithium extraction rate is 99.96 % and separation factor of lithium to sodium reaches >160,000 at the O/A phase ratio of 1:1.