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Selective Solid-Liquid and Liquid-Liquid Extraction of Lithium Chloride Using Strapped Calix4pyrroles

机译:束缚杯4吡咯的选择性固液和液液萃取氯化锂

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摘要

LiCl is a classic "hard" ion salt that is present in lithium-rich brines and a key component in end-of-life materials (that is, used lithium-ion batteries). Its isolation and purification from like salts is a recognized challenge with potential strategic and economic implications. Herein, we describe two ditopic calix[4]pyrrole-based ion-pair receptors (2 and 3), that are capable of selectively capturing LiCl. Under solid-liquid extraction conditions, using 2 as the extractant, LiCl could be separated from a NaCl/KCl salt mixture containing as little as 1% LiCl with circa 100% selectivity, while receptor 3 achieved similar separations when the LiCl level was as low as 200 ppm. Under liquid-liquid extraction conditions using nitrobenzene as the nonaqueous phase, the extraction preference displayed by 2 is KC1 > NaCl > LiCl. In contrast, 3 exhibits high selectivity towards LiCl over NaCl and KC1, with no appreciable extraction being observed for the latter two salts.
机译:LiCl是一种经典的“硬”离子盐,存在于富含锂的盐水中,并且是报废材料(即废旧锂离子电池)中的关键成分。从类似的盐中分离和纯化是公认的挑战,具有潜在的战略和经济意义。在这里,我们描述了两个基于对位杯[4]吡咯的离子对受体(2和3),它们能够选择性地捕获LiCl。在固液萃取条件下,使用2作为萃取剂,LiCl可以从含有低至1%LiCl的NaCl / KCl盐混合物中分离出来,选择性约为100%,而当LiCl含量低时,受体3可以实现类似的分离为200 ppm。在使用硝基苯作为非水相的液-液萃取条件下,由2显示的萃取优先级为KCl> NaCl> LiCl。相反,3对NaCl和KCl表现出对LiCl的高选择性,对于后两种盐没有观察到明显的萃取。

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  • 会议地点 Strasbourg(FR)
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    University of Texas at Austin, Office of Technology Commercialization, 3925 West Braker Lane, West Pickle Research Building, Suite 1.9A, Austin, TX 78759 USA;

    University of Texas at Austin, Department of Chemistry, 105 East 24th Street A5300, Austin, TX 78712 USA;

    University of Texas at Austin, Department of Chemistry, 105 East 24th Street A5300, Austin, TX 78712 USA;

    University of Texas at Austin, Department of Chemistry, 105 East 24th Street A5300, Austin, TX 78712 USA;

    University of Texas at Austin, Department of Chemistry, 105 East 24th Street A5300, Austin, TX 78712 USA;

    University of Texas at Austin, Department of Chemistry, 105 East 24th Street A5300, Austin, TX 78712 USA;

    Gyeongsang National University, Research Institute of Natural Science and Department of Chemistry, Jinju, 660-701 South Korea;

    Oak Ridge National Laboratory, Chemical Sciences Division, Oak Ridge, TN 37830 USA;

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  • 正文语种 eng
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