Patents Assigned to Aristech Chemical Corportion
  • Crystalline magnesia-silica composites and process for producing same
    Patent number: 4721827
    Abstract: Novel aromatic alkylation catalysts are manufactured by an extended hydrothermal treatment of the precipitation product of a magnesium salt with sodium silicate in the presence of tetrapropylammonium bromide or related compound.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: January 26, 1988
    Assignee: Aristech Chemical Corportion
    Inventors: Leonard A. Cullo, Edward F. Restelli, Jr., Francis J. Shiring, III