Process for preparing perhaloacyl chlorides
AssigneeE. I. Du Pont de Nemours and Company
InventorsStephen E. Jacobson, Wayne B. Ely
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Abstract
A process for preparing perhaloacyl chlorides such as trifluoroacetyl chloride by oxidizing lower perfluoroalkyl and monochloroperfluoroalkyl dichloromethane within the supercritical region and in the absence of water.
Claims6
A process for preparing perhaloacyl chlorides of the formula X(CF.sub.2).sub.n COCl comprising contacting compounds of formula X(CF.sub.2).sub.n CHCl.sub.2 with oxygen in the absence of water within the supercritical region of said compounds
- wherein
- X=F or Cl and
- n=1-4.
A continuous process for preparing trifluoroacetyl chloride comprising oxidizing 1,1 dichloro-2,2,2-trifluoroethane with dry air as a source of oxygen in a pipeline reactor at a temperature of 220.degree.-300.degree. C., at a total pressure of 700-1400 psig and a time of 3-15 minutes in the absence of water, wherein the 1,1-dichloro-2,2,2-trifluoroethane to oxygen stoichiometric ratio is 1.0/0.5 to 1.0/1.0.
Dependencies are inferred from the claim text.