Isobaric vapor-liquid equilibrium(VLE) data for the methanol-dimethyl carbonate system containing ionic liquids(ILs) have been measured at 101.32 kPa using a modified Othmer still.The ionic liquids employed were 1-ethyl-3-methylimidazolium tetrafluoroborate(BF4) and 1-octyl-3-methylimidazolium tetrafluoroborate(BF4).The vapor-liquid equilibrium curves of the ionic liquid-containing systems deviate from that of the IL-free system and the deviation increases with increasing amount of IL.The IL shows a salt ef...