Liquid-liquid equilibria of lactam containing binary systems

被引：21
作者：
Alcalde, Rafael [1 ]
Aparicio, Santiago [1 ]
Davila, Maria J. [1 ]
Garcia, Begona [1 ]
Leal, Jose M. [1 ]
机构：
[1] Univ Burgos, Dept Chem, Burgos 09001, Spain
来源：
FLUID PHASE EQUILIBRIA | 2008年 / 266卷 / 1-2期
关键词：
lactam; pyrrolidone; liquid-liquid equilibria; equations of state; SAFT; PC-SAFT;
D O I：
10.1016/j.fluid.2008.02.008
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this work, we report a study on the liquid-liquid phase equilibria for N-methyl-2-pyrrolidone (NMP)+ hydrocarbon (n-hexane, n-octane, n-clecane, cyclohexame, cyclooctane, 2-methylpentane, 3-methylpentane, isooctane, 2,2-dimethylbutane and 2,3-dimethylbutane) and N-cyclohexyl-2-pyrrolidone (NCP) + water binary mixtures at ambient pressure. The studied systems, except NCP + water, present miscibility curves with upper critical solutions temperatures (UCSTs). The results for NMP+hydrocarbon mixtures are correlated using two different approaches: (i) NRTL and UNIQUAC semiempirical models and (ii) molecular-based equations of state (statistical associating fluid theory (SAFT) and perturbed-chain statistical associating fluid theory (PC-SAFT)). Accurate correlations are inferred for NRTL and UNIQUAC models whereas for SAFT and PC-SAFT EOS complex mixing rules are required to obtain accurate results. (C) 2008 Elsevier B.V. All rights reserved.
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页码：90 / 100
页数：11
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