In this paper, the performances characteristics of small refrigerating system using non azeotropic mixtures are introduced.

Pervaporation, as one of high efficient and economic membrane separation methods, is capable of separating azeotropic and near-boiling point mixtures.

Owning to the predominant advantages in separating azeotropic and close-boiling point mixtures, batch azeotropic distillation is being paid more and more attention.