To produce anhydrous alcohol by using azeotropic distillation have lots of merits such as continuous operation, less investment, lower energy consumption, high purity of product and so on. now It is the most popular process in anhydrous alcohol preparation. But in practical azeotropic distillation operations, a small fluctuation of operation process parameter may have great effect to the distillation's stability which would make the azeotropic point deflected and break the working conditions of azeotropy required.

采用共沸精馏法生产无水乙醇具有生产连续、投资少、消耗能源品位低,产品纯度高等优点,该生产工艺目前还是工业化生产工业无水乙醇的主要方法。