膜科学与技术

镁锂分离纳滤膜的研究进展

作者：赵国珂，潘国元，张杨，于浩，赵慕华，唐功庆，刘轶群

单位：中石化（北京）化工研究院有限公司，北京 100013

关键词：镁锂分离；纳滤膜；荷正电；膜分离；盐湖提锂

出版年,卷(期):页码： 2023,43(1):154-164

摘要：

随着锂电池行业的快速发展和广泛应用，全球锂资源消耗量逐年增大，节能高效的提锂技术日益受到关注。Mg2+和Li+的分离是盐湖卤水提锂工艺中最具难度的环节，纳滤膜可有效降低盐湖卤水中的镁锂比，在盐湖卤水提锂领域具有良好的应用前景。本文总结了近年来商品纳滤膜用于镁锂分离的研究进展，梳理了操作参数对膜性能的影响，深入讨论针对镁锂分离的荷正电纳滤膜的设计与制备，在此基础上，提出该领域的核心问题和发展方向，旨在为推动膜法盐湖提锂的实际应用提供参考。

The global consumption of lithium resources has increased significantly with the rapid development and extensive application of lithium-ion batteries. Great efforts have been devoted to develop efficient and sustainable lithium recovery technologies. The separation of Mg2+ and Li+ is the most challenging step in the whole lithium recovery process. Nanofiltration (NF) has promising application prospects in the field of salt-lake brine lithium extraction owing to the good Mg2+/Li+ selectivity, low energy consumption and small footprint. The review summarizes the investigations on commercial NF membranes for Mg2+/Li+ separation and discusses the effects of operation parameters on the separation performance. The rational design and fabrication of positively charged NF membranes for Mg2+/Li+ separation is discussed. The critical challenges are analyzed and the potential research directions are proposed, aiming at promoting the practical applications of NF technologies for lithium recovery from salt-lake brine.

第一作者简介：赵国珂（1995-），女，河南南阳人，工程师，博士，研究方向为分离膜材料，E-mail：zhaogk.bjhy@sinopec.com

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