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KMID : 0385520110240060477
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Analytical Science & Technology
2011 Volume.24 No. 6 p.477 ~ p.483
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The analytical study on synthesis and purification of high purity ionic liquid, 1-ethyl-3-methylimidazolium tetrafluoroborate
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Yang Kyung-Chul
Lee Young-Hwan
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Abstract
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This work is on the synthesis of EMI-BF4 (1-ethyl-3-methylimidazolium tetrafluoroborate) and purification of spectroscopic grade using aluminium oxide method, activated charcoal method, and liquid/liquid fractional extraction method in order to make supercapacitor finally. But the aluminum oxide method and the activated charcoal method were not suitable for obtaining high-purity ionic liquids. The liquid/liquid fractional distillation method turned out that as the concentration of solvent (H2O) was increased, the higher purity of EMI-BF4 was obtained and the electrical capacity of this compound was increased to higher value. When the solvent was changed to from methylene chloride to 1,2-dichloroethane, the higher purity of EMI-BF4 was obtained.
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KEYWORD
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ionic liquids, supercapacitor, 1-Ethyl-3-methylimidazolium tetrafluoroborate,
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