Removal of Na+ from ionic liquids by zeolite for high quality electrolyte manufacture
Date
2013
Authors
Cho, W.J.
Seo, Y.
Jung, S.J.
Lee, W.G.
Kim, B.C.
Mathieson, G.
Yu, K.H.
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Journal article
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Bulletin of the Korean Chemical Society, 2013; 34(6):1693-1697
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Abstract
This study develops a novel method to remove the free cations created during the synthesis of ionic liquid. The cations are removed from the ionic liquid by size-selective adsorption onto chemically surface-modified Zeolite. The porous crystal nano-structure of Zeolite has several electron-rich Al sites to attract cations. While large cations of an ionic liquid cannot access the Zeolite nano-structure, small cations like Na+ have ready access and are adsorbed. This study confirms that: Na+ can be removed from ionic liquid effectively using Zeolite; and, in contrast to the conventional and extensively applied ion exchange resin method or solvent extraction methods, this can be done without changing the nature of the ionic liquid.
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Copyright 2013 Korean Chemical Society