Preparation method of 1,1-difluoro-2-chloroethylene

The invention discloses a method for preparing 1,1-difluoro-2-chloroethylene by carrying out dehydrochlorination on dichlorodifluoroethane in presence of a catalyst; the catalyst is prepared from a main catalyst-inorganic base and a cocatalyst-phase transfer catalyst. The method provided by the invention does not need to use an organic solvent, and has the advantages of being high in reaction yield, mild in technology, simple in operation, less in by-products, small in amount of the three wastes, environmentally-friendly, and the like. 本发明公开了种在催化剂作用下、二氯二氟乙烷脱氯化氢制备得到1,1-二氟-2-氯乙烯的方法，所述催化剂包括主催化剂无机碱和助催化剂相转移催化剂。本发明提供的方法无需使用有机溶剂，具有反应收率高、工艺温和、操作简单、副产物少、三废量少和绿色环保等优点。