Ideal Entrainer Using Heterogeneous Azeotropic Distillation

Although benzene is a more favorable entrainer for this separation or similar ethanol dehydration process, its use is prohibited because of the carcinogenic nature of this entrainer. Having insight into what constitutes a good entrainer will help to identify other potential candidates as entrainers. 

The best ideal entrainer for the separation using heterogeneous azeotropic distillation is one that only forms one additional minimum-boiling heterogeneous azeotrope with water. 

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