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oai:riubu.ubu.es:10259/47052024-11-05T11:01:49Zcom_10259_4393com_10259_5086com_10259_2604col_10259_4394

Thermodynamics of Mixtures Containing Amines. XV. Liquid–Liquid Equilibria for Benzylamine + CH3(CH2)nCH3 (n = 8, 9, 10, 12, 14) Alonso Tristán, Cristina González López, Juan Antonio García de la Fuente, Isaías Cobos, José Carlos . Coexistence curves for the liquid−liquid equilibria (LLE) of 1-phenylmethanamine (benzylamine) + CH3(CH2)nCH3 (n = 8, 9, 10, 12, 14) have been determined using the critical opalescence method by means of a laser scattering technique. All of the LLE curves show an upper critical solution temperature (UCST), which increases with increasing n. For systems including a given n-alkane, the UCST decreases in the sequence aniline > 2-methylaniline (o-toluidine) > benzylamine > N-methylaniline > pyridine. This means that amine−amine interactions become weaker in the same order. Most of the DISQUAC interaction parameters for the aliphatic/amine (a,n) and aromatic/ amine (b,n) contacts previously determined for solutions with aniline, o-toluidine, or N-methylaniline have been used for the representation of the LLE data. Only the first dispersive interaction parameter of the (a,n) contact has been modified. The coordinates of the critical points are correctly represented by the model. 2018-01-17T09:33:38Z 2018-01-17T09:33:38Z 2018-01-17T09:33:38Z 2014-06 info:eu-repo/semantics/article 0021-9568 http://hdl.handle.net/10259/4705 10.1021/je500283s eng Journal of Chemical and Engineering Data. 2014, V. 59, n. 6, p. 2101–2105 https://doi.org/10.1021/je500283s info:eu-repo/semantics/openAccess American Chemical Society