Lithium hydroxide monohydrate (LiOH⋅H₂O) is a crucial precursor for the production of lithium-ion battery cathode material. In this work, a process for LiOH⋅H₂O production using barium hydroxide (Ba(OH)₂) from lithium sulfate (Li₂SO₄) (leachate of lithium mineral ores) solution is developed. The effect of operating parameters including reagent type, initial reactant concentration and reaction temperature are investigated. Under the best conditions, more than 90% of the lithium in the initial concentrated Li₂SO₄ solution is converted to solid LiOH⋅H₂O with 99.6% purity in a one-step sonication assisted process. Additional lithium recovery and purification steps are proposed to improve this process. The by-product of the process is barium sulfate (BaSO₄), which can be directly sold or used to reproduce the initial Ba(OH)₂ reagent and is proved to be feasible in this study. Technoeconomic analysis of the process indicates that it is economically viable. It is expected this study would help the lithium industry improve the production of high quality LiOH⋅H₂O from lithium resources in a sustainable and efficient manner.

一水氢氧化锂 (LiOH⋅H ₂ O) 是生产锂离子电池正极材料的关键前体。在这项工作中，开发了一种使用氢氧化钡 (Ba(OH) ₂ ) 从硫酸锂 (Li ₂ SO ₄ )（锂矿物浸出液）溶液生产LiOH·H ₂ O的工艺。研究了包括试剂类型、初始反应物浓度和反应温度在内的操作参数的影响。在最佳条件下，初始浓缩 Li ₂ SO ₄溶液中90% 以上的锂转化为固体 LiOH⋅H ₂O 在一步超声辅助过程中具有 99.6% 的纯度。建议额外的锂回收和纯化步骤来改进这个过程。该过程的副产品是硫酸钡 (BaSO ₄ )，它可以直接出售或用于再生最初的 Ba(OH) ₂试剂，在本研究中被证明是可行的。该过程的技术经济分析表明它在经济上是可行的。预计这项研究将帮助锂行业以可持续和有效的方式提高从锂资源中生产高质量 LiOH·H ₂ O 的能力。