CIESC Journal ›› 2017, Vol. 68 ›› Issue (5): 1899-1905.DOI: 10.11949/j.issn.0438-1157.20161727

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Lithium recovery from Qarham brine using adsorption-membrane separation hybrid system

MENG Qingwei, ZHANG Feng, CHEN Lu, XIA Yongsheng, JU Shengui, XING Weihong   

  1. National Engineering Research Center for Special Separation Membrane, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China
  • Received:2016-12-09 Revised:2017-02-15 Online:2017-05-05 Published:2017-05-05
  • Supported by:

    supported by the National Natural Science Foundation of China(U1407122) and State Key Laboratory of Materials-Oriented Chemical Engineering(ZK201313).

离子筛吸附与陶瓷膜耦合用于盐湖卤水提锂

孟庆伟, 张峰, 陈璐, 夏永生, 居沈贵, 邢卫红   

  1. 南京工业大学化工学院, 国家特种分离膜工程技术研究中心, 江苏 南京 210009
  • 通讯作者: 邢卫红
  • 基金资助:

    国家自然科学基金项目(U1407122);材料化学工程国家重点实验室自主课题项目(ZK201313)。

Abstract:

Lithium uptake from brine has attracted great interest in recent years. An adsorption and membrane separation coupling system used for recovery lithium from brine with high ratio of magnesium to lithium. Lithium ion sieve H1.6Mn1.6O4(HMO) was obtained from o-LiMnO2 which was prepared by one-step hydrothermal synthesis and its adsorption property in Qarham brine was studied. The results showed that the particle size of HMO was between 100 to 500 nm and its adsorption capacity of Li+ in brine reached 31.44 mg·g-1. Ceramic membrane with pore size of 50 nm showed the highest permeation flux (150 L·m-2·h-1) and 100% rejection of lithium ion sieves. During the adsorption-membrane continue process, the extraction rate of lithium was more than 97%, and backflushing could effectively enhance the membrane filtration process. The fouled ceramic membrane was recovered with HCl and H2O2 solution. The results implied that the adsorption-membrane separation hybrid system could be used for lithium extraction from brine with high Mg/Li ratio, and had a good application prospect.

Key words: ceramic membrane, ion sieve, adsorption, separation of lithium and magnesium, brine

摘要:

将锰系离子筛吸附与陶瓷膜耦合,用于高镁锂比盐湖卤水的提锂研究。采用水热法制备了高效锂离子筛H1.6Mn1.6O4,考察离子筛用于卤水提锂效果和陶瓷膜的分离性能。结果表明:制备的离子筛粉体粒径分布在100~500 nm之间,平均粒径为160 nm,用于察尔汗盐湖卤水中对Li+吸附容量达到31.44 mg·g-1;孔径50 nm的陶瓷膜对离子筛的截留率达到100%,膜渗透通量大于150 L·m-2·h-1;反冲操作可有效维持吸附-膜分离过程的稳定性,吸附与陶瓷膜的耦合过程对盐湖卤水中的锂提取率超过97%,盐酸和双氧水清洗可有效恢复膜渗透通量。研究结果为高镁锂比盐湖卤水提锂提供了新方法。

关键词: 陶瓷膜, 离子筛, 吸附, 镁锂分离, 盐湖卤水

CLC Number: