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

被引：12
|
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
收藏
页码：366 / 369
页数：4
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