Patent ID: 9249260
Filing Date: 2016-02-02
CPC Classification: C08G

Claim Text:
1. A continuous process for preparing perfluoropolyethers of formula wherein: T is a functional end group selected from the group consisting of —CF z=0 or 1; R comprising the reduction of peroxidic perfluoropoly-ethers comprising one or more of the following fluorooxyalkylene repeating units: (CF by using gaseous hydrogen in the presence of a catalyst in the form of pellets or powder comprising one or more metals of the VIII group supported on graphitic materials, wherein the graphitic materials consist essentially of graphic carbon, and wherein the reduction comprises continuously feeding the peroxidic perfluoropolyethers and gaseous hydrogen into a reactor and continuously removing HF formed during the reduction of the peroxidic perfluoropolyethers from the reactor for at about 50 hours.