A method for producing methyl fluoride, comprising the steps of: (1) pyrolyzing a starting compound in a gas phase to thereby obtain a mixed gas containing methyl fluoride and acid fluoride; and (2) rectifying the mixed gas obtained in step (1) to thereby obtain methyl fluoride.

A method for producing methyl fluoride, comprising the steps of: (1) pyrolyzing a starting compound in a gas phase to thereby obtain a mixed gas containing methyl fluoride and acid fluoride; and (2) rectifying the mixed gas obtained in step (1) to thereby obtain methyl fluoride.

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 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 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.

Disclosed is a process for the synthesis of fluorinated olefins, and in particularly preferred embodiments tetrafluorinated olefins having F on an unsaturated, non-terminal carbon, such as 2,3,3,3-tetrafluoropropene. The preferred processes of the present invention in accordance with one embodiment generally comprise: (a) reacting a compound of formula (I)

X.sup.1X.sup.2  (I)

with a compound of formula (II)

CX.sup.1X.sup.2X.sup.3CX.sup.1═CX.sup.1X.sup.2  (II)

to produce a reaction product comprising a compound of formula (III)

CF.sub.3CHX.sup.1CH.sub.2X.sup.2  (III), and (b) exposing said compound of formula (III) to reaction conditions effective to convert said compound of formula (III) to a compound of formula (IV)

CF.sub.3CZ═CH.sub.2  (IV)

wherein X.sup.1, X.sup.2, and X.sup.3 are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine and iodine, provided that X.sup.1 and X.sup.2 in formula (I) are not both hydrogen and Z is Cl, I, Br, or F.

Disclosed is a process for the synthesis of fluorinated olefins, and in particularly preferred embodiments tetrafluorinated olefins having F on an unsaturated, non-terminal carbon, such as 2,3,3,3-tetrafluoropropene. The preferred processes of the present invention in accordance with one embodiment generally comprise: (a) reacting a compound of formula (I)

X.sup.1X.sup.2  (I)

with a compound of formula (II)

CX.sup.1X.sup.2X.sup.3CX.sup.1═CX.sup.1X.sup.2  (II)

to produce a reaction product comprising a compound of formula (III)

CF.sub.3CHX.sup.1CH.sub.2X.sup.2  (III), and (b) exposing said compound of formula (III) to reaction conditions effective to convert said compound of formula (III) to a compound of formula (IV)

CF.sub.3CZ═CH.sub.2  (IV)

wherein X.sup.1, X.sup.2, and X.sup.3 are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine and iodine, provided that X.sup.1 and X.sup.2 in formula (I) are not both hydrogen and Z is Cl, I, Br, or F.

An azeotropic cleaning solvent composition has from about 96 to about 98 weight percent 1,1,1,3,3,3-hexafluoro-2-methoxypropane (“HFMOP”) and from about 2 to about 4 weight percent acetone, for example, about 97 weight percent HFMOP and about 3 weight percent acetone. Another composition of the invention has a weight ratio of HFMOP to acetone of about 24 to about 99, for example, about 24 to 49. Conventional additives such as surfactants, lubricants and co-solvents may be present in an amount not to exceed about 10 weight percent of the composition. A method of the invention comprises contacting an article of manufacture with the solvent composition in order to clean the article of manufacture and then removing the solvent composition from the article of manufacture.

An azeotropic cleaning solvent composition has from about 96 to about 98 weight percent 1,1,1,3,3,3-hexafluoro-2-methoxypropane (“HFMOP”) and from about 2 to about 4 weight percent acetone, for example, about 97 weight percent HFMOP and about 3 weight percent acetone. Another composition of the invention has a weight ratio of HFMOP to acetone of about 24 to about 99, for example, about 24 to 49. Conventional additives such as surfactants, lubricants and co-solvents may be present in an amount not to exceed about 10 weight percent of the composition. A method of the invention comprises contacting an article of manufacture with the solvent composition in order to clean the article of manufacture and then removing the solvent composition from the article of manufacture.

Provided are a method for producing a fluoroethane, which is the desired product, with high selectivity; and a method for producing a fluoroolefin. The production method according to the present disclosure comprises obtaining a product comprising a fluoroethane represented by CX.sup.1X.sup.2FCX.sup.3X.sup.4X.sup.5 (wherein X.sup.1, X.sup.2, X.sup.3, X.sup.4, and X.sup.5 are the same or different and each represents a hydrogen atom, a fluorine atom, or a chlorine atom; and at least one of X.sup.1, X.sup.2, X.sup.3, X.sup.4, and X.sup.5 represents a hydrogen atom) from a fluoroethylene by a reaction in the presence of at least one catalyst in at least one reactor. The reaction is performed by introducing a starting material gas comprising the fluoroethylene into the reactor, and the water content in the starting material gas is 150 ppm by mass or less based on the total mass of the starting material gas.