Vapor–liquid equilibria for the binary system 2,2−dimethylbutane + 1,1−dimethylpropyl methyl ether (TAME) at 298.15, 318.15, and 338.15 K

Vapor–liquid equilibrium (VLE) data are reported for the binary mixtures formed by 2,2-dimethylbutane and the branched ether 1,1-dimethylpropyl methyl ether (tert-amyl methyl ether or TAME). A Gibbs-van Ness type apparatus was used to obtain total vapor pressure measurements as a function of composition at 298.15, 318.15, and 338.15 K. Deviations from Raoult’s law are positive and very small. These VLE data are analyzed together with excess enthalpy (HmE) data previously reported at 298.15 K using the UNIQUAC model. The modified UNIFAC (Dortmund) model is used to predict VLE data.