Process for the isomerization of hexafluoropropylene oxide to hexafluoroacetone
AssigneeE. I. Du Pont de Nemours and Company
InventorEdward N. Squire
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Abstract
A continuous process for the isomerization of hexafluoropropylene oxide to hexafluoroacetone comprises passing hexafluoropropylene oxide in contact with liquid antimony pentafluoride adsorbed on a solid support under conditions which substantially prevent loss of antimony pentafluoride from the reactor in which the isomerization is carried out and removing the hexafluoroacetone product at about the same rate as that at which it is formed. Hexafluoroacetone is an important industrial monomer, which can be copolymerized, for example, with ethylene and tetrafluoroethylene to a product that finds use in coating electrical wires.
Claims10
A process for the isomerization of hexafluoropropylene oxide to hexafluoroacetone comprising contacting in a reactor, at a temperature of about 10.degree.-200.degree. C., a stream of gaseous hexafluoropropylene oxide at an absolute pressure of about 0.103-13.79 MPa with a catalyst consisting essentially of liquid antimony pentafluoride adsorbed on a solid support;
- hexafluoroacetone being removed from the reactor at essentially the same rate as it is formed;
- and a portion of the reactor close to the hexafluoroacetone removal point being cooled to prevent loss of antimony pentafluoride.
Dependencies are inferred from the claim text.