Patents Assigned to Kabushiki Kaisha Musashino Kagaku Kenkyusho
  • Method of regenerating cation exchange membrane by treatment with strong acid at above 110.degree. C.
    Patent number: 4526904
    Abstract: A method for regenerating a perfluorinated cation exchange polymer membrane which can give only a low current efficiency as a result of being used as a diaphragm in an electrolytic cell or an electrodialyzer, said method comprising maintaining said perfluorinated cation exchange polymer membrane at a temperature of at least 110.degree. C. while keeping it in contact with an aqueous solution of a strong acid having a pH at ordinary temperature of not more than 1.0.
    Type: Grant
    Filed: July 15, 1983
    Date of Patent: July 2, 1985
    Assignee: Kabushiki Kaisha Musashino Kagaku Kenkyusho
    Inventors: Konosuke Kishida, Masaru Hirokawa