Study of the Dependence on Temperature and Composition of the Volumic Properties of Ethane-1,2-diol + 2-Methoxyethanol + 1,2-Dimethoxyethane + Water Solvent System and Graphical Representation in the Quaternary Domain |
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Authors: | Alessandro Ulrici Marina Cocchi Giorgia Foca Matteo Manfredini Daniela Manzini Andrea Marchetti Simona Sighinolfi Lorenzo Tassi |
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Institution: | (1) Department of Agricultural Sciences, University of Modena and Reggio Emilia, via J. F. Kennedy, 17, 42100 Reggio Emilia, Italy;(2) Department of Chemistry, University of Modena and Reggio Emilia, via G. Campi 183, 41100 Modena, Italy;(3) INSTM, UdR of Modena University, via B. Varchi 59, 50132 Firenze, Modena, Italy |
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Abstract: | In this paper, the temperature and composition dependencies of the volumetric behavior are studied for the ethane-1,2-diol
+ 2-methoxyethanol + 1,2-dimethoxyethane + water quaternary system. Density data were collected at different temperatures
ranging from −10 to 80 ∘C and at atmospheric pressure over the whole composition range, 0≤ xi(i = 1, 2, 3, 4)≤ 1. Moreover, we also made use of the results on the six binary (ij) and four ternary (kij) subsystems studied previously. The excess molar volume (VE) data have been fitted to an equation derived from the well-known Redlich–Kister equation and some interesting correlations
were found. Furthermore, in order to represent in an effective way the behavior of the VE = VE(xi) function (and of the derived partial molar quantities) in the quaternary domain, a new algorithm has been developed, which
gives 3D plots where the dependent function is depicted by means of “colored slices” of the tetrahedron corresponding to the
investigated composition quaternary domain. |
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Keywords: | Quaternary solvent systems nonelectrolytic liquid mixtures density ethane-1 2-diol 2-methoxyethanol 1 2-dimethoxyethane water backward selection procedure quaternary plots |
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