Study On Sperating Ethanol-Water System By New Dehydration Process With Azeotropic Distillation

Azeotropic distillation is one of important methods in chemical industry, which was widely used in the separation of azeotrope. On the basis of summarizing separation methods of ethanol-water system, it was found that the method of azeotropic distillation to produce anhydrous alcohol has lots of advantages such as continuous operation, higher yield and purity of product, lower energy consumption and so on. At present it is the important way and the most popular process of industrial processing of anhydrous alcohol.In the production technology of anhydrous alcohol with azeotropic distillation, entrainers which commonly used are benzene , cyclohexane and pentane etc. Benzene is a traditional kind of entrainer and has been widely used, but it can't be used to produce anhydrous alcohol that applied in cosmetics pharmaceutical, national defence and so on because of its toxicity. In this article, cyclohexane was selected as an entrainer for its less toxicity. In practical azeotropic distillation operations, a small fluctuation of operation process parameter may has great effect on the distillations stability which would make the azeotropic point deflected and result in the product...