F[C:2](F)(F)C1(F)OC1(F)F.[F:11][C:12]([F:20])([F:19])[C:13]([C:15]([F:18])([F:17])[F:16])=O>>[F:11][C:12]([F:20])([F:19])[C:13](=[CH2:2])[C:15]([F:18])([F:17])[F:16]In the form of the present invention starting from hexafluoropropylene oxide, a vapor stream of hexafluoropropylene oxide is fed at any convenient flow rate, e.g., in the range of about 0.04 to about 0.06 g-mole/hr to a reactor maintained at a temperature in the range of about 400° to about 650° C. and containing a fluorinated catalyst (hereinafter described) for a residence time sufficient to for a vapor stream comprising hexafluoroacetone which is not isolated but forwarded directly to a heating zone of the reactor for conversion to hexafluoroisobutylene.
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