Patents Examined by G. R. Andrews
  • Process for preparing fluorine by electrolysis of calcium fluoride
    Patent number: 4802970
    Abstract: A process for producing fluorine from calcium fluoride in which calcium fluoride is dissolved in a molten salt electrolyte containing an alkali metal tetrafluoroborate and the melt is electrolyzed at a temperature below 400.degree. C.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: February 7, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gleb Mamantov