Phase Equilibrium and Excess Enthalpy Data for the System Methanol + 2,2‘-Diethanolamine + Water

Isothermal vapor−liquid equilibrium (VLE) data are reported for the binary systems methanol + 2,2‘-diethanolamine and water + 2,2‘-diethanolamine and for the ternary system methanol + 2,2‘-diethanolamine + water. Moreover, excess enthalpies ( H E ) were measured for both binary systems with 2,2‘-diethanolamine. The data were measured by means of a computer operated static apparatus and isothermal flow calorimetry, respectively. For the pure component 2,2‘-diethanolamine, also vapor pressure data were measured using the dynamic ebulliometric method. The experimental binary data were correlated using linear or even quadratic temperature-dependent NRTL interaction parameters. The ternary data were used to validate the capability of g E models such as NRTL for the prediction of multicomponent mixtures on the basis of binary information.