| 摘要 |
PURPOSE: To readily obtain the subject compound which has been hard to industrially produce on an industrial scale by reacting difluoroethylene with dichorofluoromethane in the presence of a Lewis acid catalyst and then fluorinating the resultant product with hydrogen fluoride. CONSTITUTION: This method for producing 1,1,1,3,3-pentafluoropropane is to initially react 1,1-difluoroethylene (hereinafter referred to as 2F) with dichlorofluoromethane (hereinafter referred to as R21) in the presence of a Lewis acid catalyst (preferably BF3 , AlCl3 , etc.), provide 1,2,2- trihydrodichlorotrifluoropropane and then fluorinate the resultant compound with hydrogen fluoride. The addition reaction of the F2 with R21 is preferably carried out in the liquid phase at -10 to +100 deg.C under a slight pressure to 10kg/cm<2> (gauge pressure). The fluorinating reaction is preferably conducted in the liquid phase at 20-150 deg.C according to a continuous reactional method. Furthermore, SbF5 , NbCl5 , etc., are preferred as the fluorinating catalyst used for the fluorination in the liquid phase. |
