R. Martínez, J. González, and Isaías García de la Fuente
Sep 9, 2000
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0
Influential Citations
36
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Journal
Journal of Chemical & Engineering Data
Abstract
Liquid−liquid equilibria (LLEs) data are reported for 2-(2-ethoxyethoxy)ethanol + hexane, heptane, octane, decane, dodecane, and hexadecane mixtures between 274.5 K and the upper critical solution temperatures (UCSTs). The coexistence curves were determined visually. They have a rather horizontal top, and their symmetry depends on the size of the alkane. For systems with dodecane or hexadecane, they are skewed to the region of higher mole fractions of 2-(2-ethoxyethoxy)ethanol. An opposite behavior is observed when hexane or heptane is involved. The (x1, T) data were fitted to the equation T = Tc + k|y − yc|m, where y = αx1/[1 + x1(α − 1)] and yc = αx1c/[1 + x1c(α − 1)]. Tc and x1C are the coordinates of the critical points fitted together with k, m, and α. Results are briefly discussed on the basis of the existence of inter- and intramolecular H-bonds as well as of dipole interactions, which occur in solutions containing hydroxyethers.