Patent ID: 8829236
Filing Date: 2014-09-09
Classification: C07C

Abstract:
1. A process for preparing a halogenoacetyl fluoride, the process comprising: step 1)—preparing a halogenoacetyl halide by photooxidation of a chlorinated or brominated ethylenic compound under conditions such that said chlorinated or brominated ethylenic compound is converted to said halogenoacetyl halide with a conversion of at most equal to 80%, resulting in a reaction mixture comprising said halogenoacetyl halide and excess chlorinated or brominated ethylenic compound, wherein the halogenoacetyl in said halogenoacetyl halide is selected from the group consisting of chloroacetyls and bromoacetyls, and wherein the halide in said halogenoacetyl halide is a chloride or a bromide; step 2)—partially fluorinating said reaction mixture obtained by said step 1) by reaction of said reaction mixture with hydrofluoric acid, to obtain a mixture of halogenoacetyl fluoride and said excess chlorinated or brominated ethylenic compound, wherein the halogenoacetyl in said halogenoacetyl fluoride is selected from the group consisting of chloroacetyls and bromoacetyls; and step 3)—separating said halogenoacetyl fluoride from said excess chlorinated or brominated ethylenic compound.