Selective removal of acetylenes from olefin mixtures through specific physicochemical interactions of ionic liquids with acetylenes.
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.
Department of Chemistry and Research Institute of Basic Science, Kyung Hee University, 1 Hoegi-dong, Dongdaemoon-gu, Seoul 130-701, Rep. of Korea.
Jung Min
JM
Lee
Jelliarko
J
Palgunadi
Jin Hyung
JH
Kim
Srun
S
Jung
Young-seop
YS
Choi
Minserk
M
Cheong
Hoon Sik
HS
Kim