Patent ID: 7786333

Claim:
A process for producing a fluorinated olefin having from three to six carbon atoms and a degree of halogen substitution of N, the process comprising the steps of: (a) converting, in at least two reaction stages, a fluorinated olefin having a degree of halogen substitution of N+1 to at least one fluorinated alkane having a degree of halogen substitution of N+1; and (b) converting said fluorinated alkane to a fluorinated olefin having a degree of halogen substitution of N and substantially the same number of carbon atoms as the fluorinated olefin starting material; wherein the first of said at least two reaction stages provides a conversion of said fluorinated olefin starting material of from about 10% to about 60%, and the second of said at least two reaction stages provides a conversion of said fluorinated olefin starting material at a conversion rate that is greater than the conversion in said first stage.