Patents Represented by Attorney Norman H. Stepno, Esq.

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  • Co/Cr catalyzyed oxidation of cyclohexane
    Patent number: 6147256
    Abstract: Carboxylic acids, e.g., adipic acid, are more selectively prepared by oxidizing cyclohexane with oxygen or an oxygen-containing gas, in liquid phase, in a solvent reaction medium which comprises a polar protic or aprotic solvent, and also in the presence of a catalytically effective amount of catalyst values dissolved in said solvent reaction medium, the catalyst values comprising at least one solvent-soluble cobalt compound and at least one solvent-soluble chromium compound.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: November 14, 2000
    Assignee: Rhodia Fiber and Resin Intermediates
    Inventors: Michel Costantini, Eric Fache