Preparation method of 1, 2-dimethoxy-1, 1, 2, 2-tetrafluoroethane

The invention discloses a novel preparation method of 1, 2-dimethoxy-1, 1, 2, 2-tetrafluoroethane, and belongs to the technical field of organic fluorine chemical industry. According to the method, 1, 1-difluoro-2, 2-dichloroethane (R132a) and hydrogen fluoride are taken as initial raw materials, and the 1, 2-dihydroxy-1, 1, 2, 2-tetrafluoroethane is prepared through fluorination, chlorination and substitution reaction. The synthesis route of the 1, 2-dimethoxy-1, 1, 2, 2-tetrafluoroethane is expanded, and the synthesis route is low in raw material cost and high in purity. The raw material 1, 1-difluoro-2, 2-dichloroethane (R132a) is a high-boiling residue in the production process of industrial 1, 1-difluoro-1-monochloroethane and is obtained through separation and purification, the utilization rate of the raw material is increased, and the production cost is reduced. 一种1,2-二甲氧基-1,1,2,2-四氟乙烷的制备新方法，属于有机氟化工技术领域。以1,1-二氟-2,2-二氯乙烷（R132a）和氟化氢为起始原料，经过氟化、氯化，取代反应制备1,2-二羟基-1,1,2,2-四氟乙烷的方法。本发明拓展了1,2-二甲氧基-1,1,2,2-四氟乙烷合成