azeotropy

The energy consumption of azeotropy distillation was low but its energy-saving effects were inferior to that by multiple-effects extraction distillation.

法能耗低,节能效果不如多效萃取,和多效萃取都需塔压进行控制;

Energy-saving ethanol dehydration techniques to produce dehydrated alcohol mainly included four measures as azeotropy distillation, extraction distillation, absorptive process and membrane separation.

摘要节能型乙醇脱水制备无水乙醇的方法主要有4种：法、萃取法、吸附法和膜分离法。