Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Removal of Na+ from Ionic Liquids by Zeolite for High Quality Electrolyte Manufacture

  • Cho, Won-Je (Department of Chemistry, Dongguk University-Seou) ;
  • Seo, Yongseong (Department of Chemistry, Dongguk University-Seou) ;
  • Jung, Soon Jae (Department of Chemistry, Dongguk University-Seou) ;
  • Lee, Won Gil (Department of Chemistry, Dongguk University-Seou) ;
  • Kim, Byung Chul (Department of Chemistry, Dongguk University-Seou) ;
  • Mathieson, Grant (The Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes Campus) ;
  • Yu, Kook-Hyun (Department of Chemistry, Dongguk University-Seou)
  • Received : 2013.02.09
  • Accepted : 2013.03.14
  • Published : 2013.06.20
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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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