(222p) Vapor-Liquid Equilibria and Excess Gibbs Energies of the Binary Systems (3,3'-diaminodipropylamine + water), (1,3-diaminopentane + water), Or (1,5-diamino-2-methylpentane + water) At Several Temperatures

Amines are an important class of compounds used in different fields of industry, they represent a particularly interesting family of molecules for the purpose of testing group-contribution models, and analyze of the intramolecular effects, especially the proximity effect.

The present paper is part of a research program on thermodynamic properties of aqueous solutions of amines. The purpose of this work is to investigate vapor-liquid equilibria (VLE) of (3,3'-diaminodipropylamine + water), (1,3-diaminopentane + water),or (1,5-diamino-2-methylpentane + water) binary mixtures with a view to use the results to determine the interaction parameters for predictive group contribution methods. a survey of the literature shows that thereis no data available in the literature.

The vapor pressures of the three binary mixtures and of all the pure components were measured by means of two static devices at temperatures between 263 and 363 K. The data were correlated with the Antoine equation. From these data, excess Gibbs functions were calculated for several constant temperatures and fitted to a fourth-order Redlich-Kister equation using Barker’s metho.

The NRTL and UNIQUAC models have also been used and good results were obtained in the prediction of the total pressure using.