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.

引用

页码：90 / 100

页数：11

共 39 条

[1] STATISTICAL THERMODYNAMICS OF LIQUID-MIXTURES - NEW EXPRESSION FOR EXCESS GIBBS ENERGY OF PARTLY OR COMPLETELY MISCIBLE SYSTEMS [J].