Ineos Fluor Holdings Limited

Michael Anthony Davies

Richard Llewellyn Powell

Paul Nicholas Ewing

Christopher John Skinner

An improved process for the manufacture of CF CHF by contacting 1,2-dichloro-1,1,2-trifluoroethane (CClF CHClF) or 1-chloro-1,1,2,2-tetrafluoroethane (CHF CClF ) or mixtures of CF CHCl and CClF CHClF or mixtures of CF CHClF and CHF CClF with HF in the presence of a Cr O catalyst prepared by pyrolysis of ammonium dichromate, the reaction being conducted under controlled conditions whereby the production of CF CHF is maximized, and the formation of chloropentafluoroethane (CF CClF ) and other perhalo derivatives is minimized. The subject hydrogen-containing compound is useful as a blowing agent, propellant, refrigerant, fire extinguishing agent, or sterilant carrier gas.

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Runcorn, United Kingdom

Michael Anthony Davies