101.3 kPa 下异丙醇-异丁醇-正丁醇汽液平衡的测定与关联-

第28卷第1期高校化学工程学报No.1 V ol.28 2014 年 2 月 Journal of Chemical Engineering of Chinese Universities Feb. 2014文章编号：1003-9015(2014)01-0015-06

101.3 kPa下异丙醇-异丁醇-正丁醇汽液平衡的测定与关联

王娟, 包宗宏

(南京工业大学化学化工学院, 江苏南京 210009)

摘要：用改进的Rose釜测定了101.3 kPa下异丙醇-异丁醇、异丙醇-正丁醇、异丁醇-正丁醇3个二元体系及异丙醇-

异丁醇-正丁醇1个三元体系的汽液平衡数据。3组两元汽液平衡数据均通过了Herington热力学一致性检验，三元汽

液平衡数据也通过了McDermett-Ellis热力学一致性检验。分别用Wilson、 NRTL和UNIQUAC方程对二元汽液平衡

数据进行了关联，得到了相应的模型参数及关联偏差。对于3个二元体系而言，Wilson和UNIQUAC模型方程比NRTL

模型方程的关联效果好。最后运用关联得到的Wilson二元交互作用参数预测了三元体系的汽液平衡数据，平衡温度的

平均绝对偏差为0.52℃，异丙醇的汽相摩尔组成平均绝对偏差为0.0057，异丁醇的汽相摩尔组成平均绝对偏差为

0.0048，实验值与预测值基本吻合。

关键词：异丙醇；异丁醇；正丁醇；汽液平衡

中图分类号：O642.42 文献标识码：A DOI：10.3969/j.issn.1003-9015.2014.01.002

Measurement and Correlation of Vapor-Liquid Equilibrium Data for

2-Propanol+Isobutanol+1-Butanol System at 101.3 kPa

WANG Juan, BAO Zong-hong

(College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China)

Abstract: Isobaric vapor-liquid equilibrium (VLE) data for 2-propanol+isobutanol, 2-propanol+ 1-butanol, isobutanol+1-butanol and 2-propanol+isobutanol+1-butanol were measured at 101.3 kPa by an improved Rose still. All the binary VLE data have passed the thermodynamic consist test proposed by Herington. The ternary VLE data also have passed the McDermett-Ellis thermodynamic consist test. The parameters and regression deviations for the Wilson, NRTL and UNIQUAC equations were obtained by correlating the binary VLE data. For the above three pairs of binary system, it was found that the correlation results of the Wilson and UNIQUAC equations are better than that of NRTL equation. At last, a prediction for the ternary VLE system was given by the correlated Wilson binary parameters. The average absolute deviation for equilibrium temperature is 0.52℃; the average absolute deviations for vapor-phase mole fraction of 2-propanol and isobutanol are 0.0057 and 0.0048, respectively. So the ternary data of the prediction agree well with the experiment data.

Key words: 2-propanol; isobutanol; 1-butanol; vapor-liquid equilibrium

1前言

随着国际油价的不断上涨，国内石油资源的日渐匮乏，当前煤制混合醇生产在国内掀起热潮，通过新型的煤化工合成技术，以煤为原料在一套装置内同时生产C1～C8的混合醇，已经开始加速推进国内的产业化进程[1]。

把混合醇进行多级分馏，可得到甲醇、乙醇、正丙醇、异丙醇等一系列单醇。然而进行精馏设计与计算的基础条件是具备分离体系的汽液平衡数据。上述混合醇中，大部分体系之间的汽液平衡数据已有

收稿日期：2012-10-29；修订日期：2013-02-27。

作者简介：王娟(1987-)，女，山东泰安人，南京工业大学硕士生。通讯联系人：包宗宏，E-mail：zhbao@https://www.360docs.net/doc/d911261385.html,