Patents Represented by Law Firm Bell, Boyd & Llyod
  • Process for purification of hydrochlorofluoroethanes
    Patent number: 5951830
    Abstract: To remove the olefinic impurities from a hydrochlorofluoroethane of formula: CF.sub.3 --CHClX (X=H, F, or Cl), it is subjected to a photochlorination stage.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: September 14, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Rene Bertocchio, Andre Lantz, Daniel Roland, Bertrand Collier