Difluoroethane has good prospects in the field of organic synthesis, and integrated development enterprises have greater potential.

Difluoroethane, also known as 1,1-difluoroethane, abbreviated as R152a, HFC-152a, has a molecular formula of C2H4F2. It appears as a colorless gas with a slight ether-like odor and low toxicity. Difluoroethane is stable, insoluble in water, and soluble in organic solvents such as ethanol and ether. It is easy to burn. When mixed with air, there is a danger of explosion when exposed to open flames or high heat. It will react violently when in contact with oxidants. The thermal decomposition product is toxic hydrogen fluoride gas. .

There are three main preparation processes for difluoroethane: one is to use acetylene generated by the reaction of calcium carbide and water as raw material, and react with hydrogen fluoride in the presence of sulfonyl fluoride; the other is to use 1,1-dichloroethane and hydrogen fluoride as the raw material It is obtained by reacting raw materials; the third one is synthesized by using vinyl chloride as raw material. In the Chinese market, due to the easy availability of raw materials and low cost, the acetylene method has a higher application rate. The acetylene method includes two routes: liquid phase method and gas phase method. The domestic liquid phase method takes longer to produce and the technology is more mature, but the gas phase method The method has more advantages in production costs, waste emissions, etc.

Difluoroethane can be used in refrigerants, foaming agents, aerosol propellants, aircraft propellants and other fields. Difluoroethane is a third-generation hydrofluorocarbon (HFCs) refrigerant with an ODP (ozone depletion potential) of zero. It is more environmentally friendly than the first- and second-generation refrigerants. The physical, chemical and thermodynamic properties of difluoroethane are close to those of the first-generation refrigerant R12, and the cooling capacity per unit volume and energy efficiency ratio are higher. Therefore, it is an excellent substitute for R12 and can also be compounded with other refrigerants to form a mixture. Refrigerants are widely used in automobile air conditioners, refrigerators and freezers, and other fields.

According to the “2021-2025 Difluoroethane Industry In-depth Market Research and Investment Strategy Suggestions Report” released by the Industrial Research Center, Difluoroethane has a high GWP (global warming potential) and is flammable and explosive. It has limited development space in the field of refrigerants and will eventually be replaced by fourth-generation refrigerants in the future. Difluoroethane can also be used as a raw material for organic synthesis to prepare R142b (1,1-difluoro-1-chloroethane). R142b can produce vinylidene fluoride (VDF) monomer, which is used to synthesize polyvinylidene fluoride (VDF). PVDF) is an important raw material. In the preparation process of polyvinylidene fluoride, my country mainly uses the R142b production method, so difluoroethane has more development prospects in the field of organic synthesis in the future.

Industry analysts said that polyvinylidene fluoride is an engineering plastic with excellent comprehensive properties and can be used in a wide range of downstream applications. It is produced in my country The number of enterprises continues to increase. Since the raw material R142b is a second-generation refrigerant and has poor environmental protection, the government is promoting its accelerated withdrawal. Production quotas will be issued every year. However, its use as a raw material is not subject to this restriction. However, new R142b production capacity must be matched with polyvinylidene fluoride production capacity, so R152a -R142b-Enterprises with a complete upstream and downstream expansion of the PVDF industry chain have greater development potential. The main manufacturers of difluoroethane in my country include Yonghe Co., Ltd. and Lianchuang Co., Ltd. Both Yonghe Co., Ltd. and Lianchuang Co., Ltd. are planning to build polyvinylidene fluoride production lines and have good future development prospects.