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2019

Why is pervaporation membrane attracting attention?

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I don't know if you are familiar with pervaporation membranes. In short, pervaporation is an emerging membrane separation technology. Among them, membrane materials are the key to achieving energy conservation and efficiency in the PV process. What is a pervaporation membrane and its characteristics? Today, the editor will help you summarize relevant knowledge.
The pervaporation membrane evaporation process (referred to as PV) is the process of selectively absorbing and decomposing components in a mixed solution and the diffusion rate of each component in the membrane to separate or enrich a portion of an organic mixture. Its outstanding advantages: it can achieve separation tasks that traditional methods such as distillation, extraction, and adsorption are difficult to complete, with low energy consumption, and is particularly suitable for near boiling point, constant boiling point mixtures, and the same detonation structure. It is difficult or impossible to separate through ordinary rectification. And separate compounds with poor thermal stability. The removal of trace amounts of water in organic solvents and mixed solvents, as well as the separation of small amounts of organic pollutants in wastewater, has significant economic and technological advantages. It has been widely used in many industrial fields such as petroleum, chemical, pharmaceutical, and environmental protection.
Characteristics and classification of pervaporation membranes
1. The characteristics of pervaporation membranes are compared with traditional separation technologies such as distillation and reverse osmosis membranes, which have the following characteristics:
(1) Choose high efficiency, high separation factor, approximately twice that of reverse osmosis.
(2) Compared with azeotropic distillation, it has low energy consumption and saves 12-1/3 of energy.
(3) The process is simple, the additional process is small, and the operation is convenient.
(4) This process does not introduce other reagents, and the product and environment are not contaminated; (6) Easy to expand, integrate, and integrate with other processes.