| 摘要 |
PURPOSE:To prepare the titled substance useful as a synthetic raw material of various fluorine compounds, by carrying out the catalytic isomerization reaction of hexafluoropropylene epoxide in the presence of a fluorinated chromium oxide catalyst having high activity and extremely high durability. CONSTITUTION:The titled substance is prepared by the catalytic isomerization reaction of hexafluoropropylene epoxide using a catalyst composed mainly of fluorinated chromium oxide. The fluorine content of the catalyst is preferably 5-45wt% (expecially 5-30wt%), and the catalyst can be prepared by contacting chromium oxide (Cr2O3) with a fluorinating agent (e.g. HF, etc.) at 100-400 deg.C. The catalyst is heat-treated at 150-400 deg.C before use, and the isomerization reaction is carried out at room temperature -300 deg.C. EFFECT:The catalyst keeps high activity for a long period even without using a deactivation preventing means comprising the addition of oxygen gas to the reaction system. |
