Patent ID: 6818796
Filing Date: 2004-11-16
Classification: C07C

Abstract:
A process for the preparation of a fluorinated ketone of general formula: wherein:R1 and R2, which are identical or different, represent a hydrocarbon group containing 1 to 40 carbon atoms, with the further proviso that: at least one of the R1 and R2 groups does not comprise hydrogen atoms on the carbon atom at position &agr; with respect to the carbonyl group, and at least one of the R1 and R2 groups comprises one or more fluorine atoms, said process comprising the steps of:(a) reacting in gaseous phase a carboxylic acid of Formula (II): wherein R1 is as defined above, and a carboxylic acid of formula (III): wherein R2 is as defined above,in the presence of a catalyst comprising at least one oxide of a metallic element which is a rare earth, thorium, titanium or aluminum; and (b) recovering the ketone of general formula (I) from step (a).