文献类型：期刊文献

英文题名：Boron extraction from lithium-rich brine using mixed alcohols

作者：Guo, Jie[1];Yang, Ying[1];Gao, Xinyi[1];Yu, Jianguo[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Resources Proc Engn, Minist Educ, Shanghai 200237, Peoples R China

年份：2020

卷号：197

外文期刊名：HYDROMETALLURGY

收录：;EI(收录号：20203909225834);WOS:【SCI-EXPANDED(收录号:WOS:000581073700008)】；

基金：The authors wish to acknowledge the financial support from the National Natural Science Foundation of China (No. U1707601).

语种：英文

外文关键词：Salt lake brine; Boric acid; Solvent extraction; TMPD; Extraction process

摘要：Boron removal from lithium-rich brine was systematically investigated by solvent extraction using 2,2,4-trimethyl-1,3-pentanediol (TMPD) dissolved in 2-ethylhexanol and sulfonated kerosene. The extraction parameters were determined, including the concentration of mixed alcohols, lithium and solvents loss. During the extraction, a single TMPD molecule reacted with a single boric acid molecule to form a complex with two C-O-B ester bonds. The mechanism was also verified using density functional theory (DFT). The overall extraction efficiency reached 99.95% by a two-stage countercurrent extraction. NaOH (0.2 mol/L) with an O/A phase ratio of 1:2 was used to strip the loaded organic phase with 99.99% stripping efficiency. The feasible industrial application of this boron extraction method was validated.