Method for modifying fluorine distribution in a hydrocarbon compound

A process for modifying the fluorine distribution in a hydrocarbon compound, comprising a step of making contact between said hydrocarbon compound and a catalytic composition comprising a chromium-based catalyst in a reactor, said reactor made of a material comprising a base layer made of a material M1, wherein M1 comprises at least 70% by weight of iron on the basis of the total weight of the material M1, and an inner layer made of a material M2, wherein M2 comprises at least 40% by weight of nickel on the basis of the total weight of the material M2, said base layer and said inner layer being laid against each other by bonding wherein the material M2 is in contact with the hydrocarbon compound and has an elongation greater than that of the material M1, wherein the rate of corrosion of the material M2, measured according to ASTM D 2328-65 T, is less than 1 mm/year.

A process for modifying the fluorine distribution in a hydrocarbon compound, comprising a step of making contact between said hydrocarbon compound and a catalytic composition comprising a chromium-based catalyst in a reactor, said reactor made of a material comprising a base layer made of a material M1, wherein M1 comprises at least 70% by weight of iron on the basis of the total weight of the material M1, and an inner layer made of a material M2, wherein M2 comprises at least 40% by weight of nickel on the basis of the total weight of the material M2, said base layer and said inner layer being laid against each other by bonding wherein said inner layer has a thickness of between 0.05 and 10 mm, said thickness of said inner layer being less than that of said base layer, wherein the rate of corrosion of the material M2, measured according to ASTM D 2328-65 T, is less than 1 mm/year.