SEARCH Articles Figures Tables 1 -Butyl-3-methylimidazolium Ionic liquid , l-Butyl-3-methylimidazolium tetrafluoroborate L- -3-methylimidazolium L-Butyl-3-methylimidazolium-based ionic liquids L-Butyl-5- L-butyl-3-methylimidazolium Methylimidazolium