Density, refraction index and vapor-liquid equilibria of N-methyl-2-hydroxyethylammonium butyrate plus (methyl acetate or ethyl acetate or propyl acetate) at several temperatures

► Densities, refraction indices and VLE were measured for ester + m-2-HEAB mixtures. ► VE, apparent molar volumes and thermal expansion coefficients were calculated. ► Peng-Robinson EoS + Wong-Sandler mixing rule + COSMO-SAC predicted the data.