Driven by the rapid development of the polysulfone resin market, the demand for dichlorodiphenylsulfone continues to increase

Dichlorodiphenyl sulfone, whose chemical name is 4,4′-dichlorodiphenyl sulfone, is a chemical substance with the molecular formula C12H8CL2O2S. It appears as white crystal, insoluble in water and slightly soluble in ethanol. Dichlorodiphenyl sulfone is an important chemical raw material and intermediate for medicines, pesticides, and dyes. It is used in the preparation of leprosy drug 4,4′-diaminodiphenyl sulfone and the synthesis of polysulfone, polysulfone, polyethersulfone, and polyamide. , polyetheretherketone and other engineering plastics play an important role.

Dichlorodiphenyl sulfone is mainly prepared through chemical synthesis methods, including sulfuric acid method, chlorosulfonic acid method, phosphorus oxychloride method, pyrosulfate method, etc., and the production methods are relatively diverse. The sulfuric acid method refers to the process of synthesizing dichlorodiphenyl sulfone through batch or continuous methods using industrial sulfuric acid and chlorobenzene as raw materials; the chlorosulfonic acid method refers to using chlorobenzene, chlorosulfonic acid, and aluminum trichloride as raw materials. The process of refining dichlorodiphenyl sulfone through chemical reactions, condensation and other links; the phosphorus oxychloride method refers to using chlorobenzene, chlorosulfonic acid, and phosphorus oxychloride as raw materials, and catalyzing the reaction of ferric chloride to generate dichlorodiphenyl sulfone. The process of phenyl sulfone; the pyrosulfate method refers to the process of using sulfur trioxide, dimethyl sulfate, chlorobenzene, etc. as raw materials to generate dichlorodiphenyl sulfone through chemical reactions.

Dichlorodiphenyl sulfone is an important raw material for polysulfone resins. Driven by the rapid development of the polysulfone resin market, the demand for dichlorodiphenyl sulfone is increasing. Polysulfone resin is an important type of engineering plastics and is widely used in aerospace, electronics and electrical, food processing, medical equipment, automobile manufacturing and other fields. Taking polyethersulfone as an example, its domestic market size will reach 750 million yuan in 2022, a year-on-year increase of 6.2%. In this context, according to the “China Dichlorodiphenyl Sulfone Industry Market Monitoring and Future Development Prospects Research Report 2023-2027” released by the Industrial Research Center It shows that dichlorodiphenyl sulfone, as a key raw material for the production of polysulfone, will have a domestic production capacity of approximately 18,000 tons in 2022.

Affected by the low level of localization of downstream polysulfone resins, there are currently only a small number of domestic dichlorodiphenyl sulfone companies. The main companies include Hebei Xulong Chemical, Henan New Tianjie Industrial, Fuhai Group, Jinhai New Energy Technology, and Guangdong Youju Advanced New materials, Jiujiang Zhongxing Pharmaceutical and Chemical Industry, etc. At present, compared with leading international chemical companies such as Germany’s BASF, Belgium’s Solvay, Japan’s Sumitomo, and India’s Galmai Chemicals, local dichlorodiphenyl sulfone companies have a large gap in technology, scale, product quality, etc. In the future, local companies still need to Accelerate the improvement of competitiveness.

Industry analysts said that dichlorodiphenyl sulfone is a key raw material for the production of polysulfone resins and is currently used in terminal electronics, food, Driven by the rapid development of automobiles, medical and other fields, the market scale of polysulfone resins continues to expand, which in turn drives the demand for dichlorodiphenyl sulfone to increase, and the industry shows good development prospects. At the same time, against the background of the current accelerating domestic substitution process in the domestic polysulfone market, the demand for dichlorodiphenyl sulfone is continuously increasing, which is beneficial to the development of the domestic industry.