Vapor-Liquid Equilibrium for Methyl Isobutyl Ketone (MIBK) + (1-Propanol or 2-Propanol) Binary Mixtures

Isothermal vapor-liquid equilibrium (VLE) data for 1-propanol + methyl isobutyl ketone at 338.15, 353.15, and 368.15 K and 2-propanol + methyl isobutyl ketone were measured at 323.15, 338.15, and 353.15 K. All the measurements were undertaken on a recirculating VLE glass still operated at isothermal conditions. The experimental VLE data for all the measured binary systems were correlated with the Wilson and NRTL activity coefficient models using the gamma-phi approach (γ-Φ) with the Hayden and O'Connell correlation employed for calculating the second virial coefficients that are used in accounting for nonidealities in the vapor phase. The models provided satisfactory correlation of the measured alcohol-ketone-binary mixtures at all the temperatures reported. The thermodynamic consistency of the data was checked using the point test method of Van Ness et al. (Van Ness, H. C., Byer, S. M., and Gibbs, R. E. AIChE J. 1973, 19, 238-244) as well as the more rigorous direct test of Van Ness (Van Ness, H. C. Pure Appl. Chem. 1995, 67, 859-872). (Graph Presented).