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Technology with pervaporation dehydration or separation of organic compounds, highlighting the advantages of energy saving, environmental protection, simple operation, be able to replace distillation, extraction, adsorption, separation and other traditional methods, and implementation of these conventional methods is difficult or impossible to achieve the separation requirements, or in organic matter kinds of components in a mixture of a small amount of organic material or the removal of trace water on a more obvious advantages, can be widely used in pharmaceutical, fine chemicals, electronics and other industries in the recycling of the solvent, ethanol production, can also be and coupled chemical reactions such as esterification, and continuously removing reaction products, improve conversion rates, are the most advanced liquid separation methods. Pervaporation because the separation process in the distillation method, as not all the same material vaporized, but only will be required to separate components (such as water) evaporation, pervaporation therefore more energy-saving, environmental protection.