Abstract: A method for producing 1,1,1,3,3-pentafluoropropane, which comprises reducing at least one chlorofluorohydrocarbon selected from the group consisting of CF.sub.3 CClXCClF.sub.2 wherein X is a H atom or a Cl atom, and CF.sub.3 CCl.dbd.CF.sub.2, with hydrogen in the presence of a reduction catalyst comprising, as a first component, at least one metal selected from the group consisting of Ru, Rh, Pd and Pt, and, as a second component, at least one metal selected from the group consisting of Ni, Co, La, Re, W, Ta, Nb, Ti, Zr, Mo, Cu, Ag and Au.

Abstract: A method for producing a polyfluoropropionyl halide, which is characterized by oxidizing at least one dichloropentafluoropropane selected from 3,3-dichloro-1,1,1,2,2-pentafluoropropane and 1,3-dichloro-1,1,2,2,3-pentafluoropropane by oxygen under irradiation with light and in the presence of chlorine.The polyfluoropropionyl halide can be obtained from the dichloropentafluoropropane industrially advantageously in good yield. Further, in a gas phase reaction, the polyfluoropropionyl halide can be obtained in a very high reaction yield without decomposition of the desired product and without corrosion of the material for the reactor or the glass for the light source portion even in a reaction for a long period of time.

Abstract: A process for preparing 1,1,1,3,3-pentafluoropropane, which comprises reacting 1,1-difluoroethylene with dichlorofluoromethane in the presence of a Lewis acid catalyst to form 1,2,2-trihydrodichlorotrifluoropropane and fluorinating the 1,2,2-trihydrodichlorotrifluoropropane with hydrogen fluoride.

Abstract: A process for producing a hydrogen-containing 2,2-difluoropropane of the following formula (2), which comprises subjecting a 2,2-difluoropropane of the following formula (1) to hydrogen reduction:C.sub.3 H.sub.a Cl.sub.b F.sub.c (1)C.sub.3 H.sub.a+x Cl.sub.b-y F.sub.c-z (2)wherein a, b, c, x, y and z are integers satisfying the following conditions:a.gtoreq.0, b.gtoreq.1, c.gtoreq.2, x.gtoreq.1, y.gtoreq.0, z.gtoreq.0, a+b+c=8, x=y+z b-y.gtoreq.0, and c-z.gtoreq.2.

Abstract: A method for producing a dichloropentafluoropropane, which comprises reacting dichlorofluoromethane (R21) with tetrafluoroethylene (4F) in the presence of a Lewis acid catalyst for addition reaction to obtain dichloropentafluoropropane, wherein a halide containing at least one element selected from the group consisting of Sb, Nb, Ta, B, Ga, In, Zr, Hf and Ti, or AlBr.sub.3, or AlI.sub.3, is used as the Lewis acid.

Abstract: A process for producing a 2,2-difluoropropane of the following formula (2), which comprises fluorinating a chlorine-containing 2,2-halogenopropane of the following formula (1) by hydrogen fluoride or a fluorinating agent:C.sub.3 H.sub.a Cl.sub.b F.sub.c (1)C.sub.3 H.sub.a Cl.sub.b-x F.sub.c+x (2)wherein a, b, c and x are integers satisfying the following conditions:a.gtoreq.0, b.gtoreq.1, c.gtoreq.0, x.gtoreq.1, a+b+c=8.

Abstract: A method for producing a dichloropentafluoropropane, which comprises reacting dichlorofluoromethane (R21) with tetrafluoroethylene (4F) in the presence of a Lewis acid catalyst for addition reaction to obtain dichloropentafluoropropane, wherein a halide containing at least one element selected from the group consisting of Sb, Nb, Ta, B, Ga, In, Zr, Hf and Ti, or AlBr.sub.3, or AlI.sub.3, is used as the Lewis acid.

Abstract: A method for producing a dichloropentafluoropropane, which comprises reacting dichlorofluoromethane (R21) with tetrafluoroethylene (4F) in the presence of a Lewis acid catalyst for addition reaction to obtain dichloropentafluoropropane, wherein a halide containing at least one element selected from the group consisting of Sb, Nb, Ta, B, Ga, In, Zr, Hf and Ti, or AlBr.sub.3, or AlI.sub.3, is used as the Lewis acid.