(Liquid plus liquid) equilibria for (acetonitrile plus a carboxylic acid plus cyclohexane) at T=298.15 K

被引：9

作者：

Letcher, TM ^{[1
]}

Redhi, GG

机构：

[1] Univ Natal, Sch Chem & Appl Chem, ZA-4014 Durban, South Africa

[2] ML Sultan Technikon, Dept Chem, ZA-4000 Durban, South Africa

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2001年 / 33卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

(liquid plus liquid equilibria); acetonitrile; acetic acid; propanoic acid; butanoic acid; 2-methylpropanoic acid; pentanoic acid; 3-methylbutanoic acid; cyclohexane; NRTL; UNIQUAC;

D O I：

10.1006/jcht.2000.0763

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

(Liquid + liquid) equilibrium data are presented for (acetonitrile + acetic acid, or propanoic acid, or butanoic acid, or 2-methylpropanoic acid, or pentanoic acid, or 3-methylbutanoic acid + cyclohexane) at T = 298.15 K. The relative mutual solubility of each of the carboxylic acids is higher in the acetonitrile layer than in the hydrocarbon layer. The influence of 3-methylbutanoic acid, pentanoic acid, 2-methylpropanoic acid, and butanoic acid on the solubility of the hydrocarbons in acetonitrile is greater than that of acetic acid and propanoic acid. Three there-parameter equations have been fitted to the binodal curve data. These equations are compared and discussed in terms of statistical consistency. The NRTL and UNIQUAC models were used to correlate the experimental tie-lines and to calculate the phase compositions of the ternary systems. The NRTL equation fitted the experimental data far better than the UNIQUAC equation. Selectivity values for solvent separation efficiency were derived from the tie-line data. (C) 2001 Academic Press.

引用

页码：1643 / 1653

页数：11

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