Patents Assigned to Nobel Chemicals AB
  • Method of preparing substituted cyclic carboxylic acids
    Patent number: 4866204
    Abstract: A method is disclosed for preparing a substituted cyclic carboxylic acid from a corresponding substituted cyclic hydrocarbon. The hydrocarbon is oxidized in oxygen or air in a liquid phase in an organic solvent under alkaline conditions, in the presence of a catalyst selected from the group consisting of metal tetraphenylporphins, metal acetylacetonates, metal phthalocyanines and mixtures thereof. The oxidation is capable of proceeding generally at room temperature and atmospheric pressure.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: September 12, 1989
    Assignee: Nobel Chemicals AB
    Inventor: Nils A. Svensson