Thermodynamics of Mixtures Containing Amines. XV. Liquid鈥揕iquid Equilibria for Benzylamine + CH3(CH2)nCH3 (n = 8, 9, 10, 12, 14)

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• 作者：Cristina Alonso-Trist谩n ; Juan Antonio Gonz谩lez ; Isa铆as Garc铆a de la Fuente ; Jos茅 Carlos Cobos
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2014
• 出版时间：June 12, 2014
• 年：2014
• 卷：59
• 期：6
• 页码：2101-2105
• 全文大小：248K
• 年卷期：v.59,no.6(June 12, 2014)
• ISSN：1520-5134

文摘

Coexistence curves for the liquid鈥搇iquid 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鈥揳mine 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.