Patents by Inventor Johannes H. Tebben

Johannes H. Tebben has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Nickel catalyst
    Patent number: 4014819
    Abstract: The invention is directed to precipitating soluble nickel salts onto catalyst carriers by the addition of urea and reducing the insoluble nickel salt to the free metal to form catalyst-carrier compositions of high specific metal catalyst area wherein the amount of urea added satisfies the following equationU = f .sqroot.Ni (1)where:U = urea concentration in grams per liter;Ni = nickel ions concentration in grams per liter of water;f = a factor varying between 75/pH and 175/pH, in which pH = the pH value of the suspension of the silica in the water.
    Type: Grant
    Filed: November 26, 1974
    Date of Patent: March 29, 1977
    Assignee: Stamicarbon B.V.
    Inventors: Johannes H. Tebben, Cornelis A. M. Weterings
  • High surface area catalyst compositions
    Patent number: 4014818
    Abstract: For high-surface area hydrogenation nickel catalyst compositions, a silica carrier obtained by subjecting an alkali water glass to neutralization with sulfuric acid and spray-drying to form the silica carrier which has substantially no tendency to coalesce when used in processes requiring precipitation of an insoluble nickel compound onto the carrier.
    Type: Grant
    Filed: November 26, 1974
    Date of Patent: March 29, 1977
    Assignee: Stamicarbon B.V.
    Inventors: Johannes H. Tebben, Cornelis A. M. Weterings