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Green and efficient synthesis of lithium acetate by electrodialysis metathesis

Authors： WEI Xinlai, LI Xu, WU Ke, WANG Yan

Units： 1.School of Biology, Food and Environment, Hefei University, Hefei 230601, China; 2. Anhui Key Laboratory of Sewage Purification and Eco-restoration Materials, Hefei 230088, China.

KeyWords： lithium acetate; electrodialysis metathesis; green production

ClassificationCode：TQ028；X703

year,volume(issue):pagination： 2024,44(3):115-123

Abstract：

Lithium acetate is a commonly utilized ingredient in the fabrication and formulation of lithium-ion batteries, biopharmaceuticals, and ceramic glass, among other applications. Nevertheless, the conventional technique for manufacturing lithium acetate poses significant environmental contamination challenges. Thus, it is crucial to devise an eco-friendly and effective green approach for producing lithium acetate. The one-step electrodialysis metathesis (EDM) process used to produce lithium acetate from the primary lithium salt, lithium sulphate. The study investigated the effects of initial sodium acetate concentration, operating voltage, and initial lithium sulfate concentration on EDM performance. Furthermore, the research assessed the quality of the lithium acetate produced and conducted an economic analysis. The experimental results indicated that increasing the initial concentration of sodium acetate can enhance the concentration of lithium acetate product. Raising the operating voltage can reduce the reaction time, but it did not appear to affect the concentration of lithium acetate product. A significant rise in the ultimate concentration of lithium acetate product and an increase in the system's capacity can be achieved by elevating the initial concentrations of lithium sulfate and sodium acetate concurrently. The cost to produce lithium acetate was roughly 5590 ¥/t CH?COOLi, with an operating voltage of 20 V, 0.6 mol/L of sodium acetate and 0.3 mol/L of lithium sulfate. EDM's electrodialysis process provided obvious advantages, including simple process flow, low energy consumption and environmental safety. These benefits played a significant role in the application of electrically driven membrane separation in the manufacturing and preparation of lithium salts.

Funds：

国家重点研发计划（2020YFC1908601），合肥学院人才科研基金项目（21-22RC31）。

AuthorIntro：

卫新来（1983- ），男，安徽六安，博士，高级实验师，研究方向为膜分离和水处理技术。

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