Verfahren zur Herstellung von Dichlorfluoracetylhalogeniden

摘要

Process for preparing dichlorofluoroacetylfluoride (CFCl2COF) comprising the following steps: a) fluorination with hydrofluoric acid (HF) of the trichloroacetyl halide in a fixed or fluidized tubular bed reactor, filled with fluorination catalysts and having a temperature profile between the inlet of the reactants and the outlet of the reaction products, in the range from 175 DEG C to 275 DEG C. b) distillation of the reaction products with trichloroacetylfluoride recycle and recovery of a mixture formed by HF and CFCl2COF; c) separation of the HF/CFCl2COF mixture components by cooling at temperatures lower than -10 DEG C, and optionally the HF recycle.