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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 6
BKCSDE 34(6)
June 20, 2013 

 
Title
Removal of Na+ from Ionic Liquids by Zeolite for High Quality Electrolyte Manufacture
Author
Won-Je Cho, Yongseong Seo, Soon Jae Jung, Won Gil Lee, Byung Chul Kim, Grant Mathieson, Kook-Hyun Yu*
Keywords
Ionic liquids, Purification, 1-Ethyl-3-methylimidazolium tetrafluoroborate, Electrolyte, Zeolite
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.
Page
1693 - 1697
Full Text
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