Vapor–liquid equilibria for the binary systems decane + 1,1-dimethylethyl methyl ether (MTBE) and decane + 1,1-dimethylpropyl methyl ether (TAME) at 308.15, 318.15 and 328.15 K

Vapor–liquid equilibrium (VLE) data are reported for the binary mixtures formed by decane and the branched ethers 1,1-dimethylpropyl methyl ether (tert-amyl methyl ether or TAME) and 1,1-dimethylethyl methyl ether (tert-butyl methyl ether or MTBE). A Gibbs–Van Ness type apparatus was used to obtain total vapor pressure measurements for the decane+MTBE and decane+TAME systems as a function of composition at 308.15, 318.15 and 328.15 K. Both systems show a nearly ideal behavior. VLE data are analyzed together with excess enthalpy (HmE) data previously obtained at 298.15 K for these mixtures. The UNIQUAC model is used to correlate VLE and HmE data and the original UNIFAC group contribution model and the modified UNIFAC (Dortmund model) are used to predict VLE and HmE data for the binary systems decane+MTBE and decane+TAME.