Patent ID: 7612242

Claim:
A process for preparing perfluoroalkylvinylethers having the general formula: R f O—CF═CF 2 (IA) wherein R f is a C 1 -C 3 , perfluorinated substituent; comprising the following steps: 1) reaction of a hypofluorite of formula R f OF, wherein R f is as above, with an olefin selected from the group consisting of: trichloroethylene; 1,2-dichloroethylene; and 1,1-dichloroethylene; 2) dehalogenation or dehydrohalogenation of the fluorohalogenethers obtained in step 1) and obtainment of vinyl ethers of formula: R f O—CY I ═CY II F (IV) wherein Y I and Y II are selected from the group consisting of H, Cl, and Br with the proviso that one of Y I and Y II is H; 3) fluorination with fluorine of the vinyl ethers (IV) and obtainment of fluorohalogenethers of formula: R f O—CFY 1 —CF 2 Y II (I) wherein Y I , Y II and R f are as above; and 4) dehydrohalogenation of the fluorohalogenethers of formula (I) and obtainment of vinyl ethers of formula: R f O—CF═CF 2 (IA).