Density, refraction index and vaporaliquid equilibria of N-methyl-2-hydroxyethylammonium butyrate plus (methyl acetate or ethyl acetate or propyl acetate) at several temperatures

• Published in: The Journal of chemical thermodynamics Vol. 62; pp. 130 - 141
• Main Authors: Alvarez, V H, Mattedi, S, Aznar, M
• Format: Journal Article
• Language: English
• Published: 01-07-2013
• Subjects: Acetates; Binary systems; Density; Deviation; Ethyl acetate; Mathematical models; Molar volume; Refraction
• ISSN: 0021-9614
• DOI: 10.1016/j.jct.2013.02.022

This paper reports the densities, refraction indices, and vapor liquid equilibria for binary systems ester + N-methyl-2-hydroxyethylammonium butyrate (m-2-HEAB): methyl acetate (1) + m-2-HEAB (2), ethyl acetate (1) + m-2-HEAB and propyl acetate (1) + m-2-HEAB (2). The excess molar volumes, deviations in the refraction index, apparent molar volumes, and thermal expansion coefficients for the binary systems were fitted to polynomial equations. The PengaRobinson equation of state, coupled with the WongaSandler mixing rule, is used to describe the experimental data. Since the predictive activity coefficient model COSMO-SAC is used in the WongaSandler mixing rule, the resulting thermodynamic model is a completely predictive one. The prediction results for the density and for the vaporaliquid equilibria have a deviation lower than 1.0% and 1.1%, respectively.