Isobaric vapor–liquid equilibria for the binary systems 2-propanol+water, 2-propanol+1-ethyl-3-methylimidazolium dicyanamide ([emim][DCA]), and water+[emim][DCA] as well as the vapor–liquid equilibria for the 2-propanol+water+[emim][DCA] ternary system have been obtained at 100kPa using a recirculating still. The electrolyte nonrandom two-liquid (e-NRTL) model was used for fitting successfully the experimental data. The effect of [emim][DCA] on the 2-propanol+water system has been compared with that produced by other ionic liquids reported in the literature. From the results, [emim][DCA] appears as a good entrainer for the extractive distillation of this solvent mixture, causing the azeotrope to disappear at 100kPa when the ionic liquid mole fraction is greater than 0.085.