Article ID Journal Published Year Pages File Type
216346 The Journal of Chemical Thermodynamics 2011 6 Pages PDF
Abstract

The vapour pressures of {ethanediamine (EDA) + water}, {1,2-diaminopropane (1,2-DAP) + water}, {1,3-diaminopropane (1,3-DAP) + water} or {1,4-diaminobutane (1,4-DAB) + water} binary mixtures, and of pure EDA, 1,2-DAP, 1,3-DAP, 1,4-DAB, and water components were measured by means of two static devices at temperatures between (293 and 363) K. The data were correlated with the Antoine equation. From these data, the excess Gibbs function (GE) was calculated for several constant temperatures and fitted to a fourth-order Redlich–Kister equation using the Barker’s method. The {ethanediamine (EDA) + water}, and {1,2-diaminopropane (1,2-DAP) + water} binary systems show negative azeotropic behaviour. The aqueous solutions of EDA, 1,2-DAP, or 1,3-DAP exhibit negative deviations in GE for all investigated temperatures over the whole composition range whereas the (1,4-DAB + water) binary mixture shows negative GE for temperatures (293.15 < T/K < 353.15) and a sinusoidal shape for GE at T = 363.15 K.

Research highlights► Vapour pressures of ethanediamine (EDA), 1,2-diaminopropane, 1,3-diaminopropane (1,3-DAP), or 1,4-diaminobutane (1,4-DAB) aqueous solutions are reported between (293 and 363) K. ► The two first mixtures show negative azeotropic behaviour. ► The aqueous solutions of EDA, 1,2-DAP, or 1,3-DAP exhibit negative GE whereas the one containing 1,4-DAB shows either negative GE or sinusoidal shape for GE.

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Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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