膜科学与技术

一种提锂杂化膜的制备及其提锂性能研究

作者：解利昕，²，陈小棉¹，²

单位： 1. 天津大学化工学院化学工程研究所, 天津 300072; 2. 天津市膜科学与海水淡化技术重点实验室, 天津 300072

关键词： :Li1.6Mn1.6O4; 聚氯乙烯; 杂化膜; 提锂

出版年,卷(期):页码： 2013,33(3):103-107

摘要：

将提锂吸附剂前驱体尖晶石型锰氧化物(Spinel-type Manganese Oxide, SMO)Li1.6Mn1.6O4与聚氯乙烯(PVC)杂化, 采用溶剂法成功制备了用于海水提锂的平板膜. 该杂化膜用酸处理抽出其中的锂得到具有提锂性能的膜, 对膜进行了一系列提锂性能测试.实验结果表明, 酸洗处理后的膜对富锂溶液中锂的吸附约6 h达平衡,最大吸附量为29 mg•g-1, 之后采用0.5 M HCl溶液脱锂约1 h锂的脱出基本达到平衡, Li+的脱附率在95 %左右, 锰的溶损率在3.5 %左右. 该膜在含有Li+、Na+、K+、Mg2+、Ca2+离子的竞争吸附过程中对Li+表现出很好的选择性, 同时重复实验也表明这种提锂杂化膜具有很好的稳定性.

Spinel-type manganese oxide (SMO) Li1.6Mn1.6O4 was mixed with PVC, and then a new type of flat membrane was successfully prepared for recovering lithium from lithium-containing waters by a solvent exchange method. After the hybrid membrane was treated with an HCl solution, the membrane can uptake lithium, a series of experiments were given. As results showed, after the membrane was treated with an HCl solution it showed a good performance in adsorption capacity with a maximum adsorption of 29 mg•g-1 in six hours. When the adsorbed lithium was eluted by 0.5 M HCl, the lithium extraction reached the balance and about 95% lithium was extracted, and the rate of manganese dissolution is 3.5 %. The membrane showed good selectivity for Li+ in the competitive adsorption with Na+、K+、Mg2+、Ca2+. Repeated experiments showed that this new membrane had a good stability.

参考文献：

[1] Grady H R. Lithium metal for the battery industry [J]. Journal of Power Sources, 1980, 5(1):127-135.
[2] Garrett D E. Lithium. Handbook of Lithium and Natural Calcium Chloride [M]. Oxford: Academic Press, 2004, l-235.
[3] Chen Y C, Kenneth J H. Exploitation of Lithium in Brines by Hsu’s Method. Paradoxes in Geology [M]. Amsterdam: Elsevier Science B.V, 2001, 421- 428.
[4] Shiu J Y, Lin J R, Lee D C, et al. Method for adsorbing lithium ions from a lithium-containing aqueous solution by a granular adsorbent [P]. US patent, 2003231996. 2003.
[5] Umeno A, Miyai Y, Takagi N, et al. Preparation and Adsorptive Properties of Membrane-Type Adsorbents for Lithium Recovery from Seawater [J]. Industrial & Engineering Chemistry Research, 2002, 41(17): 4281- 4287.
[6] Chung K S, Lee J C, Kim W K, et al. Inorganic Adsorbent Containing Polymeric Membrane Reservoir for the Recovery of Lithium from Seawater [J]. Journal of Membrane Science, 325(2008): 503-508.
[7] Chitrakar R, Kanoh H, Miyai Y, et al. A New Type of Manganese Oxide (MnO2.0.5H2O) Derived from Li1.6Mn1.6O4 and Its Lithium Ion-Sieve Properties [J]. Chemistry of Materials, 2000, 12 (10): 3151- 3157.
[8] 纪志永,袁俊生,李鑫钢. 锂吸附剂的合成及其吸附性能 [J]. 化学工程, 2007, 35(8): 9- 13.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com