Replacing Halogen With Hydrogen Patents (Class 570/176)
  • Preparation of 1-chloro-1,2,2,2-tetrafluoroethane
    Patent number: 4745237
    Abstract: A method for the preparation of 1-chloro-1,2,2,2-tetrafluoroethane which comprises treating 1,1-dichloro-1,2,2,2-tetrafluoroethane, optionally in the form of an isomer mixture, with an alkali metal amalgam in an active hydrogen containing liquid medium which includes a solvent for the dichlorotetrafluoroethane.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: May 17, 1988
    Assignee: Imperial Chemical Industries PLC
    Inventors: Denis G. H. Ballard, Jeffrey Farrar, Dale A. Laidler
  • Process for the preparation of fluorinated products
    Patent number: 4478760
    Abstract: The process for making a fluorinated product comprising reacting a perfluoroalkyl iodide and an olefin in the presence of a finely divided zinc and an acidic solvent.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: October 23, 1984
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Hubert Blancou, Auguste Commeyras, Robert Teissedre