Patent ID: 7601878

Claim:
A method for producing a perfluoroalkyl iodide telomer by a telomerization reaction of a perfluoroalkyl iodide with tetrafluoroethylene catalyzed with a solid catalyst containing copper particles, which comprises: drawing a slurry containing the perfluoroalkyl iodide telomer and the catalyst from a reaction system; classifying the catalyst in the drawn slurry by a wet-type centrifugal classifier to give a high-concentration slurry having a catalyst weight concentration higher than that of the drawn slurry and a low-concentration slurry having a catalyst weight concentration lower than that of the drawn slurry; and recycling the high-concentration slurry to the reaction system, wherein activity of the catalyst in the high-concentration slurry is higher than the activity of the catalyst in the drawn slurry.