Low Temperature Fluorination of Aerosol Suspensions of Hydrocarbons Utilizing Elemental Fluorine. Aerosol Direct Fluorination-Syntheses of Perfluoroketones.

摘要

The extension of aerosol direct fluorination techniques to the syntheses of perfluoroketones from their hydrocarbon analogs is described. This continuous flow direct fluorination process is fluorine efficient, causes minimal fragmentation and produces high purity products. The purity of F-3-pentanone, F-3-heptanone, and F-4-heptanone direct from the reactor were 71%, 59% and 92% by weight respectively. Physical losses of feed hydrocarbon, which can be recovered, reduce single pass yields to 13%, 13% and 23% of total feed. Attempted fluorination of cyclopentanone produced F-pentanoyl fluoride in 61% purity and single pass yield of 24%. No evidence for F-cyclopentanone was found. (Author)