osmotic distillation;  thermodynamics;  Dynamics;  Application

Pervaporation distillation is a new membrane separation technology that combines osmotic process and distillation process, which has the advantages of saving investment and low energy consumption, and is especially suitable for the separation of heat-sensitive materials. The thermodynamics and kinetic principles of osmotic distillation process, and their application in food, medicine, biochemistry, chemical industry and other fields are briefly reviewed. At present, osmotic distillation has attracted widespread attention from scientific and technological workers in the extraction of natural substances. Due to the slow rate of pervaporation distillation process, for economic efficiency, ultrafiltration or reverse osmosis is generally used to initially concentrate the treated material, and then it is highly concentrated by pervaporation distillation, and the combined process is more effective.