Process for purifying fluoroxy compounds
AssigneeAir Products and Chemicals, Inc.
InventorsRobert George Syvret, Philip Bruce Henderson, Donald Elson Fowler, Beth Ann Campion
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Abstract
This invention relates generally to a improvement in a process for the purification of fluoroxy compounds, such as bis(fluoroxy)difluoromethane and fluoroxytrifluoromethane produced by the fluorination of carbon oxides. The improvement in effecting purification of the fluoroxy compounds is effected by initially selectively removing the fluorine by contacting with a crystalline zeolite and then removing the carbon oxide by selective adsorption.
Claims15
In a process for the purification of a fluoroxy compound present in a gaseous reaction product produced by the fluorination of carbon oxide, said gaseous reaction product containing fluorine, fluoroxy compound, and carbon oxide, the improvement for effecting purification of said fluoroxy compound which comprises:
- (a) contacting the gaseous reaction product with a crystalline zeolite under conditions for selectively removing the fluorine from the gaseous reaction product, and (b) removing the carbon oxide, whereby an essentially pure fluoroxy compound is recovered as a product of the process.
In a process for the purification of a bis(fluoroxy)difluoromethane present in a gaseous reaction product produced by the fluorination of carbon oxide, said gaseous reaction product containing fluorine, bis(fluoroxy)difluoromethane, and carbon oxide the improvement for effecting purification of said bis(fluoroxy)difluoromethane which comprises:
- (a) contacting the gaseous reaction product under conditions with a crystalline zeolite for selectively removing the fluorine from the gaseous reaction product, and (b) removing the carbon oxides, whereby an essentially pure bis(fluoroxy)difluoromethane compound is recovered as a product of the process.
In a process for the purification of fluoroxytrifluoromethane present in a gaseous reaction product produced by the fluorination of a carbon oxide, said gaseous reaction product containing fluorine, fluoroxytrifluoromethane, and carbon oxide the improvement for effecting purification of said fluoroxytrifluoromethane which comprises:
- (a) contacting the gaseous reaction product with a crystalline zeolite under conditions for selectively removing the fluorine from the gaseous reaction product, and (b) removing the carbon oxides, whereby an essentially pure fluoroxytrifluoromethane compound is recovered as a product of the process.
Dependencies are inferred from the claim text.