Vapor-liquid equilibria and vapor pressure data for the systems ethyl tert-butyl ether plus ethanol and ethyl tert-butyl ether plus water

Accurate isothermal vapor-liquid equilibrium data for the systems ethyl tert-butyl ether + ethanol at 24.8, 50, 65, and 90 degrees C and ethyl tert-butyl ether + water at 25.1 and 40 degrees C as well as pure component vapor pressures for ethyl tert-butyl ether were measured using a computer-operated static apparatus. Activity coefficients at infinite dilution and azeotropic compositions for the different temperatures were derived from the experimental P-x data. The data were simultaneously correlated together with published data with the help of either the UNIQUAC, NRTL, or Wilson model. However, the new data for the system ethyl tert-butyl ether + ethanol are in disagreement with some of the older data by Peng and Chao (Peng, C.-L.; Chao, K.-C. DIPPR Data Ser. 1994, 2, 23-27) and the pure component vapor pressure data for ethyl tert-butyl ether by Daubert (Daubert, T. E. AIChE Data Ser. 1991, 1, 80-88).