Patent ID: 6291728
Filing Date: 2001-09-18
Classification: C07C

Abstract:
A manufacturing method for 1,1,1,3,3-pentafluoropropane, wherein 1,1,1,3,3-pentafluoropropane is obtained by reacting halogenated propane, which is represented by the general formula:CX.sub.3 CH.sub.2 CHX.sub.2wherein, in the general formula, X is fluorine atom or chlorine atom, and all of X can not be fluorine atoms at the same time, with anhydrous hydrofluoric acid under the presence of antimony catalyst consisting of pentavalent antimony, or a mixture of pentavalent antimony and trivalent antimony where antimony pentafluoride is used in a concentration of not more than 10 mol % to the amount of anhydrous hydrofluoric acid, wherein the pentavalent antimony, when used alone, being in a concentration of not more than 1 mol % to the amount of the anhydrous hydrofluoric acid, andwherein, when the mixture of pentavalent antimony and trivalent antimony is used and the concentration of antimony pentafluoride is from 1 to 10 mol % to the amount of anhydrous hydrofluoric acid, the ratio of antimony pentafluoride to antimony trifluoride is not more than 1 at molar ratio.