Patents Represented by Law Firm Bell, Bond & Lloyd
  • Synthesis of difluoromethane
    Patent number: 5900514
    Abstract: The invention relates to the manufacture of difluoromethane by catalytic gas-phase fluorination of methylene chloride.The operation is carried out in the presence of oxygen at a temperature of between 330 and 450.degree. C. and with a bulk or supported chromium catalyst.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: May 4, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Benoit Requieme, Eric Lacroix, Andre Lantz