| 摘要 |
PURPOSE:To provide the present substance, by pyrolyzing octafluoroisobutyl alkyl, aryl or benzyl ether or heptafluoroisobutenyl alkyl, aryl or benzyl ether in the presence of oxygen and an active carbon catalyst. CONSTITUTION:The present substance is provided by pyrolyzing octafluoro isobutyl alkyl, aryl or benzyl ether or a heptafluoroisobutenyl ether derived therefrom at 50-600 deg.C (preferably 150-300 deg.C) in the presence of oxygen and an active carbon catalyst. As the active carbon, one having an arbitrary shape such as powder, granular or honeycomb shape can be employed, but the granu lar active carbon having a surface area of 20-200m<2>/g is particularly prefer able. The starting substance is produced from octafluoroisobutene which is a by-product in the production of hexafluoropropene that is a kind of the raw material for fluorine-containing copolymers. |
