EPOXIDATION OF TETRAFLUOROETHYLENE AND CHLOROTRIFLUOROETHYLENE

摘要

1413361 Epoxidation process E I DU PONT DE NEMOURS & CO 30 May 1963 [31 May 1972] 25890/73 Heading C2C Tetrafluoroethylene and chlorotrifluoroethylene are epoxidized by (a) activating a composition containing at least 60% by weight of silica by contacting the composition with oxygen and tetrafluoroethylene and chlorotrifluoroethylene respectively at 190‹ to 300‹ C.; and (b) contacting the activated composition with the tetrafluoroethylene or trichloroethylene and oxygen at -10‹ to 120‹ C. Preferably the "composition" contains at least 95% by weight of silica and may be, for example, silica gel, soft glass, quartz glass, various other glasses or sand.