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Updated: Jun 16, 2026

Separation of Aldehydes and Reactive Ketones from Mixtures Using a Bisulfite Extraction Protocol
Published on: April 2, 2018
Selective removal of acetylenes from olefin mixtures through specific physicochemical interactions of ionic liquids
Jung Min Lee1, Jelliarko Palgunadi, Jin Hyung Kim
1Department of Chemistry and Research Institute of Basic Science, Kyung Hee University, 1 Hoegi-dong, Dongdaemoon-gu, Seoul 130-701, Rep. of Korea.
Abstract:
Imidazolium-based ionic liquids (ILs) bearing an alkylphosphite anion, were highly efficient for the selective removal of acetylenes in olefins. Comparison of solubility data at 313 K and at atmospheric pressure shows that the solubilities of acetylene and propyne in 1,3-dimethylimidazolium methylphosphite ([DMIM][MeHPO(3)]) are about 45 and 20 times higher than those of ethylene and propylene, respectively. Computational and (1)H NMR results clearly demonstrate that there are substantial interactions between the acidic hydrogen atom or atoms of acetylenes and the phosphite anion.
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