Pervaporation membranes can be used in a wide range of applications, and the production strength of Chinese enterprises continues to increase.

Pervaporation membrane, also called pervaporation membrane, is a homogeneous membrane, asymmetric membrane, and composite membrane made of organic polymers. The working principle of the pervaporation membrane is to use the different dissolution and diffusion rates of the separated substances by the membrane to form a vapor pressure difference on both sides of the membrane. The components soluble in the membrane are permeated, and the components that are insoluble in the membrane are intercepted, thus achieve the purpose of separation.

According to the “Pervaporation Membrane Industry In-depth Market Research and Investment Strategy Suggestions Report 2022-2026” released by the Industrial Research Center, permeation The vaporized membrane has the advantages of simple operation, strong adaptability, easy adjustment, low energy consumption, high separation efficiency, can achieve molecular level separation, and is not restricted by gas-liquid balance. It is a new energy-saving and environmentally friendly membrane separation technology. Pervaporation membranes can be used to separate azeotropes, near-boilers, volatiles and other substances that are difficult to separate by traditional separation methods. Therefore, they have attracted attention and can be widely used in aerospace, petroleum, chemical industry, medicine, food, industrial wastewater treatment and other fields. .

Pervaporation membranes can be made of natural polymer compounds and synthetic polymers. Since the selectivity, solubility and diffusivity of a pervaporation membrane directly affect the separation efficiency of the membrane, the selection of its manufacturing materials is extremely important. Therefore, synthetic polymers with better comprehensive properties are mainly used as raw materials. At present, the main materials used to manufacture pervaporation membranes include polyvinyl alcohol, polyacrylonitrile, cellulose acetate, polydimethylsiloxane, etc. The products have different hydrophilicity and hydrophobicity and can be used in different scenarios.

In overseas markets, countries such as Japan, Germany, the United Kingdom, France, and the United States started early in the field of pervaporation membranes. Representative companies include the German GFT Company, the German Lurgi Company, the American DuPont, and the Japanese Mitsui Chemicals. Among them, the pervaporation membrane produced by the German GFT company was the first to achieve industrial application in the 1980s and was used in the Brazilian anhydrous ethanol production line. In addition to the German GFT Company, Japan’s Mitsui Chemicals also has strong competitiveness in the global pervaporation membrane market.

my country’s pervaporation membrane industry started late and only began to develop in the 1990s. Benefiting from the rapid growth in demand for separation membranes in industry, environmental protection and other fields, my country’s separation membrane industry has developed rapidly. The number of related scientific research institutes and production companies has continued to increase, which has promoted the continuous improvement of industry technology and production capabilities, and the product types have become increasingly diverse. At the same time, the Chinese government is paying increasing attention to the pervaporation membrane industry. In the “Made in China 2025” strategy, pervaporation membrane products are included. Benefiting from this, my country’s pervaporation membrane industry has gradually developed and grown.

Industry analysts said that the representative companies in my country’s pervaporation membrane industry mainly include Jiangsu Jiutian High-tech Co., Ltd., Jiangsu Jiutian Wu Hi-Tech Co., Ltd., etc. In 2019, Jiangsu Jiutian High-Tech Co., Ltd. took the lead in realizing the industrialization of NaA molecular sieve pervaporation membranes in China, with a market share of 90%. In order to achieve energy conservation and emission reduction, the demand for separation membranes in my country’s industrial field continues to grow. In the fields of ethanol dehydration, isopropyl alcohol dehydration and other fields, the permeability of pervaporation membranes continues to increase. From this point of view, the industry has good development prospects.