Patents Examined by J. F. Evans
  • Process for preparing chlorofluorocarbons via an in situ generated activated aluminum trichloride catalyst and products resulting therefrom
    Patent number: 4925993
    Abstract: A process of isomerizing a chlorofluorocarbon of the formula: ##STR1## wherein X is chlorine or fluorine to the compound of the formula: ##STR2## The process comprises contacting the chlorofluorocarbon with an activated aluminum trichloride catalyst. The catalyst is prepared by contacting the chlorofluorocarbon with anhydrous aluminum trichloride in the presence of a metal. The metal is selected from the group consisting of stainless steel, chromium, manganese, molybdenum, tungsten and combinations thereof.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: May 15, 1990
    Assignee: Dixie Chemical Company
    Inventor: Robert C. Zawalski