化学工程Issue(12)：34-38,5.DOI:10.3969/j.issn.1005-9954.2014.12.008
环己烷-正庚烷-N，N-二甲基甲酰胺体系液液相平衡测定与关联
Measurement and correlation of liquid-liquid equilibria for cyclohexane-heptane -N,N-dimethylformamide ternary system
张吕鸿 1陈云 1王世强 2肖晓明 1姜斌1
作者信息
- 1. 天津大学 化工学院，天津300072
- 2. 天津大学 精馏技术国家工程研究中心，天津300072
- 折叠
摘要
Abstract
Liquid-liquid equilibrium (LLE) data were measured for ternary system (n-heptane-cyclohexane-N,N-dimethylformamide) at atmospheric pressure and different temperatures (30, 40, 50 ℃).The experimental data were correlated using the Bachman and the Othmer-Tobias correlation , and the results showed a good correlation . Complete phase diagrams were obtained by tie-line data and determining solubility .The universal quasichemical activity coefficient ( UNIQUAC) and the non-random two-liquid equation ( NRTL) were used to predict the phase equilibrium in the system by the interaction parameters from the experimental data .It shows that UNIQUAC and NRTL used for LLE can provide a good correlation .The separation factors , distribution coefficients and selectivity were obtained according to the experimental data .关键词
环己烷/正庚烷/N,N-二甲基甲酰胺/液液相平衡Key words
heptane/cyclohexane/N, N-dimethylformamide/liquid-liquid equilibria分类
化学化工引用本文复制引用
张吕鸿,陈云,王世强,肖晓明,姜斌..环己烷-正庚烷-N，N-二甲基甲酰胺体系液液相平衡测定与关联[J].化学工程,2014,(12):34-38,5.
