Journal of Chemical Thermodynamics, Vol.43, No.1, 17-21, 2011
Phase equilibrium properties of binary aqueous solutions of benzylamine, 1,2-bis(2-aminoethoxy)ethane, or 2-[2-(dimethylamino)ethoxy]ethanol
The vapour pressures of (benzylamine + water) (1 2-bis(2-aminoethoxy)ethane + water) or (2-[2-(dimethylamino)ethoxy]ethanol + water} binary mixtures and pure 2-[2-(dimethylamino)ethoxy]ethanol component were measured by means of two static devices at temperatures between (283 15 and 363 15 (or 323 15)) K The data were correlated with the Antoine equation From these data excess Gibbs functions (G(E)) were calculated for several constant temperatures and fitted to a fourth-order Redlich-Kister equation using the Barker s method The (benzylamine + water) binary mixture exhibits positive deviations in G(E) for (303 15 < T/K < 323 15) and a sinusoidal shape in G(E) for T > 323 15 K over the whole composition range The aqueous 1 2-bis(2-aminoethoxy)ethane or {2-[2-(dimethylamino)ethoxy]ethanol + water} solutions exhibit negative deviations in GE for all investigated temperatures over the whole composition range (C) 2010 Elsevier Ltd All rights reserved