A process is disclosed for the manufacture of 1,1,1,3,3,3-hexafluoropropane (HFC-236fa) and at least one 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) and 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea). The process involves (a) reacting HF, Cl.sub.2, and at least one halopropene of the formula CX.sub.3CCl=CX.sub.2 (where each X is independently F or Cl) to produce a product including both CF.sub.3CCl.sub.2CF.sub.3 and CF.sub.3CClFCClF.sub.2; (b) reacting CF.sub.3CCl.sub.2CF.sub.3 and CF.sub.3CClFCClF.sub.2 produced in (a) with hydrogen to produce a product comprising CF.sub.3CH.sub.2CF.sub.3 and at least one compound selected from the group consisting of CHF.sub.2CHFCF.sub.3, and CF.sub.3CHFCF.sub.3; and (c) recovering from the product produced in (b), CF.sub.3CH.sub.2CF.sub.3 and at least one compound selected from the group consisting of CHF.sub.2CHFCF.sub.3 and CF.sub.3CHFCF.sub.3. In (a), the CF.sub.3CCl.sub.2CF.sub.3 and CF.sub.3CClFCClF.sub.2 are produced in the presence of a chlorofluorination catalyst including a ZnCr.sub.2O.sub.4/crystalline .alpha.-chromium oxide composition, a ZnCr.sub.2O.sub.4/crystalline .alpha.-chromium oxide composition which has been treated with a fluorinating agent, a zinc halide/.alpha.-chromium oxide composition and/or a zinc halide/.alpha.-chromium oxide composition which has been treated with a fluorinating agent.