Patents Represented by Attorney H. Z. Friedlander

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  • Sulfuric acid catalyst and process therefor
    Patent number: 4184980
    Abstract: A sulfuric acid catalyst is made by passing sulfur dioxide gas into an aqueous mixture of vanadium oxide, sulfuric acid, and a potassium salt compatible with the reducing reaction in situ, until a clear blue solution is obtained, wetting diatomaceous earth with this solution, drying and then calcining to provide an active supported catalyst. The process eliminates the necessity for activating the catalyst prior to use by exposure to a gas-stream containing sulfur dioxide and sulfur trioxide.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: January 22, 1980
    Assignee: Stauffer Chemical Company
    Inventors: Fawzy G. Sherif, W. Novis Smith