VAPOR-LIQUID-EQUILIBRIUM OF ETHANOL WATER N,N-DIMETHYLFORMAMIDE

被引：13

作者：

SHEALY, GS ^{[1
]}

HAGEWIESCHE, D ^{[1
]}

SANDLER, SI ^{[1
]}

机构：

[1] UNIV DELAWARE,DEPT CHEM ENGN,NEWARK,DE 19716

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 1987年 / 32卷 / 03期

关键词：

ORGANIC COMPOUNDS - WATER - Measurements;

D O I：

10.1021/je00049a024

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The low-pressure isothermal vapor-liquid equillibrium of ethanol/water/N,N-dimethylformamide (DMF) at 85 and 90 degree C has been measured. The main finding is that the addition of DMF breaks the ethanol/water azeotrope. In ethanol-rich mixtures containing 30-70 mol% DMF, the lowest relative volatility of ethanol to water is 1. 3 and this occurs at infinite dilution of water in ethanol. This suggests that ethanol and water can easily be separated by extractive distillation using DMF. A comparison with our ternary data is made of the predictions of the UNIFAC and a recently proposed solute aggregation activity coefficient model using parameters obtained from binary data.

引用

页码：366 / 369

页数：4

共 12 条

[1]

BRANDT HW, 1982, Patent No. 3038497

[2] GROUP-CONTRIBUTION ESTIMATION OF ACTIVITY-COEFFICIENTS IN NONIDEAL LIQUID-MIXTURES [J].