The permeation vaporization separation process is not limited by vapor-liquid equilibrium, and therefore has unique advantages in the separation of azeotropes that are difficult to separate by traditional methods, as well as trace water removal. Pervaporation technology has the following advantages: 1) High efficiency; 2) Low operating costs, low energy consumption, generally saving 1/2 to 2/3 more energy than conventional distillation, with an investment only 50 to 60% of that for distillation operations; 3) Good product quality; 4) Green and environmentally friendly; 5) Simple process, easy operation, convenient for scaling up and integration; 6) Can separate near-boiling compounds, azeotropes, and azeotropic mixtures.