Isobaric Vapor−Liquid Equilibria in the Systems Methyl 1,1-Dimethylethyl Ether + Octane and Heptane + Octane

Vapor−liquid equilibrium at 94 kPa has been determined for the binary systems methyl 1,1-dimethylethyl ether (MTBE) + octane and heptane + octane. Both binary systems deviate slightly from ideal behavior, and neither system presents an azeotrope. The system MTBE + octane behaves like a regular solution. The activity coefficients and boiling points of both binary systems were well correlated with its composition by the Redlich−Kister, Wohl, Wilson, UNIQUAC, NRTL, and Wisniak−Tamir equations.