Vapor–liquid equilibria of propan-1-ol + 1,1-dimethylethyl methyl ether (MTBE) mixtures. Experimental results and modeling

Abstract

Vapour–liquid equilibrium (VLE) data are reported for the binary mixtures formed by propan-1-ol and the branched ether 1,1-dimethylethyl methyl ether (tert-butyl methyl ether or MTBE). A Gibbs–van Ness type apparatus was used to obtain total vapour pressure measurements as a function of composition at 298.15, 318.15 and 338.15 K. The system shows positive and relatively large deviations from Raoult's law. The UNIQUAC, ERAS and modified UNIFAC (Dortmund) models are used to analyse these VLE data together with the VLE data at 313.15 K, the negative excess volume data at 298.15 K and the endothermic excess enthalpy data at 298.15 and 313.15 K previously reported for propan-1-ol + MTBE mixtures.