A process is disclosed for making CF.sub.3CF═CHF. The process involves reacting CF.sub.3CClFCCl.sub.2F with H.sub.2 in a reaction zone in the presence of a catalyst to produce a product mixture comprising CF.sub.3CF═CHF. The catalyst has a catalytically effective amount of palladium supported on a support selected from the group consisting of alumina, fluorided alumina, aluminum fluoride and mixtures thereof and the mole ratio of H.sub.2 to CF.sub.3CClFCCl.sub.2F fed to the reaction zone is between about 1:1 and about 5:1. Also disclosed are azeotropic compositions of CF.sub.3CClFCCl.sub.2F and HF and azeotropic composition of CF.sub.3CHFCH.sub.2F and HF.

A halogenated alkene compound and a fluorinated alkyne compound are obtained at a high conversion rate and high selectivity by employing any of the following methods (1) to (4): (1) a halogenated butane compound represented by CX.sup.1X.sup.2X.sup.3CHX.sup.4CFHCX.sup.5X.sup.6X.sup.7, wherein X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.5, X.sup.6, and X.sup.7 are the same or different and each is a halogen atom, to a dehydrofluorination reaction; (2) a halogenated butene compound represented by CX.sup.1X.sup.2X.sup.3CX.sup.4═CHCX.sup.5X.sup.6X.sup.7, wherein X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.5, X.sup.6, and X.sup.7 are as defined above, to a dehydrohalogenation reaction; (3) a halogenated alkane compound represented by CHX.sup.8A.sup.1CHX.sup.9A.sup.2, wherein A.sup.1 and A.sup.2 are each a fluorine atom or a perfluoroalkyl group, and X.sup.8 and X.sup.9 are the same or different and each is a halogen atom, to a dehydrohalogenation reaction in the presence of a catalyst in a gas phase; and (4) a halogenated alkene compound represented by CX.sup.8A.sup.1=CHA.sup.2, wherein A.sup.1, A.sup.2, and X.sup.8 are as defined above, to a dehydrohalogenation reaction in the presence of a catalyst.

A halogenated alkene compound and a fluorinated alkyne compound are obtained at a high conversion rate and high selectivity by employing any of the following methods (1) to (4): (1) a halogenated butane compound represented by CX.sup.1X.sup.2X.sup.3CHX.sup.4CFHCX.sup.5X.sup.6X.sup.7, wherein X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.5, X.sup.6, and X.sup.7 are the same or different and each is a halogen atom, to a dehydrofluorination reaction; (2) a halogenated butene compound represented by CX.sup.1X.sup.2X.sup.3CX.sup.4═CHCX.sup.5X.sup.6X.sup.7, wherein X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.5, X.sup.6, and X.sup.7 are as defined above, to a dehydrohalogenation reaction; (3) a halogenated alkane compound represented by CHX.sup.8A.sup.1CHX.sup.9A.sup.2, wherein A.sup.1 and A.sup.2 are each a fluorine atom or a perfluoroalkyl group, and X.sup.8 and X.sup.9 are the same or different and each is a halogen atom, to a dehydrohalogenation reaction in the presence of a catalyst in a gas phase; and (4) a halogenated alkene compound represented by CX.sup.8A.sup.1=CHA.sup.2, wherein A.sup.1, A.sup.2, and X.sup.8 are as defined above, to a dehydrohalogenation reaction in the presence of a catalyst.

Provided is a process for making 2-chloro-1,1,1,2-tetrafluoropropane. The process has the step of hydrofluorinating 2-chloro-3,3,3-trifluoropropene in the presence of a catalyst selected from the group consisting of SbCl.sub.3, SbCl.sub.5, SbF.sub.5, TiCl.sub.4, SnCl.sub.4, Cr.sub.2O.sub.3, and fluorinated Cr.sub.2O.sub.3.

Provided is a process for making 2-chloro-1,1,1,2-tetrafluoropropane. The process has the step of hydrofluorinating 2-chloro-3,3,3-trifluoropropene in the presence of a catalyst selected from the group consisting of SbCl.sub.3, SbCl.sub.5, SbF.sub.5, TiCl.sub.4, SnCl.sub.4, Cr.sub.2O.sub.3, and fluorinated Cr.sub.2O.sub.3.

Provided is a process for making 2-chloro-1,1,1,2-tetrafluoropropane. The process has the step of hydrofluorinating 2-chloro-3,3,3-trifluoropropene in the presence of a catalyst selected from the group consisting of SbCl.sub.3, SbCl.sub.5, SbF.sub.5, TiCl.sub.4, SnCl.sub.4, Cr.sub.2O.sub.3, and fluorinated Cr.sub.2O.sub.3.

An object of the present disclosure is to provide a method for producing HCFC-142, which is a target product, with high yield and high efficiency, by preventing the decomposition of starting materials, such as HCC-140 and HCO-1130. A method for producing HCFC-142, comprising bringing a chlorine-containing compound into contact with hydrogen fluoride in the presence of a stabilizer to perform at least one fluorination reaction, thus obtaining a reaction gas containing HCFC-142, hydrogen chloride, and hydrogen fluoride.

An object of the present disclosure is to provide a method for producing HCFC-142, which is a target product, with high yield and high efficiency, by preventing the decomposition of starting materials, such as HCC-140 and HCO-1130. A method for producing HCFC-142, comprising bringing a chlorine-containing compound into contact with hydrogen fluoride in the presence of a stabilizer to perform at least one fluorination reaction, thus obtaining a reaction gas containing HCFC-142, hydrogen chloride, and hydrogen fluoride.

This disclosure relates to processes which involve: contacting a mixture comprising at least one fluoroolefin and at least one impurity with at least one zeolite to reduce the concentration of the at least one impurity in the mixture; and the at least one zeolite is selected from the group consisting of zeolites having pore opening of at least 4 Angstroms and no more than about 5 Angstroms, zeolites having pore opening of at least about 5 Angstroms and Sanderson electronegativity of no more than about 2.6, and mixtures thereof; provided that the at least one zeolite is not zeolite 4A. This disclosure also relates to processes for making at least one hydrotetrafluoropropene product selected from the group consisting of CF.sub.3CF═CH.sub.2, CF.sub.3CH═CHF, and mixtures thereof; and relates to processes for making at least one hydrochlorotrifluoropropene product selected from the group consisting of CF.sub.3CCl═CH.sub.2, CF.sub.3CH═CHCl, and mixtures thereof.

This disclosure relates to processes which involve: contacting a mixture comprising at least one fluoroolefin and at least one impurity with at least one zeolite to reduce the concentration of the at least one impurity in the mixture; and the at least one zeolite is selected from the group consisting of zeolites having pore opening of at least 4 Angstroms and no more than about 5 Angstroms, zeolites having pore opening of at least about 5 Angstroms and Sanderson electronegativity of no more than about 2.6, and mixtures thereof; provided that the at least one zeolite is not zeolite 4A. This disclosure also relates to processes for making at least one hydrotetrafluoropropene product selected from the group consisting of CF.sub.3CF═CH.sub.2, CF.sub.3CH═CHF, and mixtures thereof; and relates to processes for making at least one hydrochlorotrifluoropropene product selected from the group consisting of CF.sub.3CCl═CH.sub.2, CF.sub.3CH═CHCl, and mixtures thereof.