Hydrofluorination of chlorinated hydrocarbons

Details Hydrofluorination of chlorinated hydrocarbons Hydrofluorination of chlorinated hydrocarbons

C - Chemistry, Metallurgy

07

C

C07C 17/20 (2006.01) C07C 17/00 (2006.01) C07C 17/21 (2006.01) C07C 19/08 (2006.01) C07C 19/10 (2006.01) C07C 21/18 (2006.01)

Patent

CA 2321892

The invention concerns improved catalytic hydrofluorination of saturated or unsaturated organic compounds corresponding to the general formula C¿w?H¿x?Cl¿y?F¿z? (I) wherein w is an integer ranging between 1 and 6, x is an integer ranging between 0 and (2w+1) or between 0 and (2w-1), y is an integer ranging between 1 and (2w+1) or between 1 and (2w-1), z is an integer ranging between 0 and (2w+1) or between 0 and (2w-1) and the sum (x + y + z) has the value (2w + 2) comprising a continuous supply of hydrogen chloride. The invention also concerns a method for preparing 1,1,1,3,3-pentachloropropane starting with 1,1,1,3,3-pentachloropropane comprising two catalytic reaction steps whereby preferably hydrogen chloride is continuously supplied into the reaction medium for at least one of the two reaction steps.

Procédé amélioré d'hydrofluoration catalytique de composés organiques saturés ou insaturés répondant à la formule générale C w H x Cl y F z (I) dans laquelle w est un nombre entier compris entre 1 et 6, x est un nombre entier compris entre 0 et (2w + 1) ou entre 0 et (2w - 1), y est un nombre entier compris entre 1 et (2w + 1) ou entre 1 et (2w - 1), z est un nombre entier compris entre 0 et (2w + 1) ou entre 0 et (2w - 1) et la somme (x + y + z) a la valeur (2w + 2), comprenant une alimentation continue en chlorure d'hydrogène. Procédé pour la préparation du 1,1,1,3,3-pentafluoropropane au départ de 1,1,1,3,3-pentachloropropane comprenant deux étapes réactionnelles catalytiques, dans lequel on effectue de préférence une alimentation continue en chlorure d'hydrogène dans le milieu réactionnel d'au moins une des deux étapes réactionnelles.

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