Effect of ionic liquid 1-methylimidazolium chloride on the vapour liquid equilibrium of water, methanol, ethanol, and {water + ethanol} mixture

► Vapour pressure data for three binary systems and a ternary system were measured. ► Water, ethanol, methanol, and 1-methylimidazolium chloride were studied. ► The vapour pressure data can be well correlated by the NRTL model. ► The isobaric (vapour + liquid) equilibria were predicted by the NRTL model. ► The salt effect of ILs on the VLE of {water + ethanol} mixture was investigated.