Vapor phase process for producing hydroflourocarbons from perchl

Details Vapor phase process for producing hydroflourocarbons from perchl Vapor phase process for producing hydroflourocarbons from perchl

1995-08-30

1996-10-29

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

570119, 570166, 570169, C07C 1708, C07C 1742

Patent

active

055697941

ABSTRACT:
An improved process for producing hydrofluorocarbons and hydrochlorofluorocarbons by reacting anhydrous hydrogen fluoride in the vapor phase and in the presence of a fluorination catalyst with an admixture of perchloroethylene and a phenolic inhibitor. The phenolic component is effective to inhibit the formation of an oxidation product in the perchloroethylene while not substantially degrading the fluorination catalyst during the fluorination process. In another embodiment, substantially all of any oxidation inhibitor is removed from the perchloroethylene in-line prior to reacting the hydrogen fluoride with the perchloroethylene.

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patent: 5091601 (1992-02-01), Carmello et al.
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