文献类型：期刊文献

英文题名：Solubility of LiOH·H2O in KOH Solutions from 333.15 to 353.15 K: Pitzer Modeling and Optimized Evaporative Crystallization for Lithium Recovery

作者：Zhao, Yu-Fei[1]; Chen, Zhuo-Fan[1]; Jiang, You-Fa[1]; Yang, Ying[1,2]; Liu, Cheng-Lin[1,2]

机构：[1] National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237, China; [2] Joint International Laboratory for Potassium and Lithium Strategic Resources, East China University of Science and Technology, Shanghai, 200237, China

年份：2026

卷号：71

期号：3

起止页码：1427

外文期刊名：Journal of Chemical and Engineering Data

收录：EI(收录号：20261120259971)

语种：英文

外文关键词：Evaporation - Evaporative cooling systems - Heat transfer - Lithium batteries - Lithium compounds - Recovery - Solubility - Temperature - Ternary systems

摘要：Lithium hydroxide monohydrate (LiOH·H2O) is a critical alkaline lithium salt for battery applications. The solubility behavior of LiOH·H2O in KOH solutions and its evaporative crystallization process were systematically investigated in this study. Solubility was measured from 333.15 to 353.15 K, and a Pitzer model was developed for this system, demonstrating an excellent correlation with the experimental data. In the LiOH–KOH–H2O ternary system, LiOH·H2O solubility increased with temperature but decreased with KOH concentration at fixed temperatures. During evaporative crystallization experiments, the effects of mixing intensity of the solution, heat-transfer temperature difference, evaporation temperature, and mother-liquor KOH concentration on both the purity of LiOH·H2O and lithium recovery rate were systematically examined. Optimized conditions (evaporation temperature: 343.15 K, heat-transfer temperature difference: 15.0 K, stirring rate: 300 rpm, and KOH concentration in mother liquor: 30 wt %) yielded a lithium recovery rate of 55.6% and product purity of 98.3%. This study provides thermodynamic insights and process guidelines for the efficient separation and purification of lithium hydroxide from alkaline solutions. ? 2026 American Chemical Society