Patent ID: 6166252
Filing Date: 2000-12-26
Classification: C07C,Y02P

Abstract:
A process for preparing dichlorofluoroacetylfluoride (CFCl.sub.2 COF) comprising the following steps:a) fluorinating trichloroacetyl halide with hydrofluoric acid in a fixed bed or a fluidized tubular bed reactor, filled with fluorination catalysts based on chromium oxide and optionally containing small amounts of iron, cobalt, aluminum, zirconium, manganese, bismuth, thorium and/or nickel oxide, having a temperature profile between the reactant input and the reaction product output, in a range of 175.degree. C. to 275.degree. C.;b) distilling the reactant products with recycle of trichloroacetyl fluoride and recovering a mixture formed by HF and CFCl.sub.2 COF;c) separating the compounds of the HF/CFCl.sub.2 COF mixture by cooling at temperature lower than -10.degree. C., and optionally the HF recycle.