Patents by Inventor Mark Donal Ryan

Mark Donal Ryan 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).

  • Stable highly active supported copper based catalysts
    Patent number: 6472561
    Abstract: Stable highly active supported copper based catalysts of copper oxide or elemental copper crystallites supported on mechanically stable aluminum oxide are disclosed. These catalysts are characterized by high surface area, small copper crystallite size, and high metal loading. The average crystallite size of the copper compound is from about 20 to about 300 Å, the copper loading is from about 10 to about 35 weight percent, the average particle diameter is from about 0.1 mm to about 10 mm, and the total surface area is from about 20 to about 400 square meters per gram. The catalysts are useful for hydration of nitrites to amides, especially hydration of acrylonitrile to acrylamide. The catalysts are distinguished by high mechanical stability, extended lifetime, and excellent resistance to hydration and copper leaching.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: October 29, 2002
    Assignee: Cytec Technology Corp
    Inventors: Mark Donal Ryan, John Bradley Roucis, James Donald Carruthers
  • Stable highly active supported copper based catalysts
    Publication number: 20020040161
    Abstract: Stable highly active supported copper based catalysts of copper oxide or elemental copper crystallites supported on mechanically stable aluminum oxide are disclosed. These catalysts are characterized by high surface area, small copper crystallite size, and high metal loading. The average crystallite size of the copper compound is from about 20 to about 300 A, the copper loading is from about 10 to about 35 weight percent, the average particle diameter is from about 0.1 mm to about 10 mm, and the total surface area is from about 20 to about 400 square meters per gram. The catalysts are useful for hydration of nitrites to amides, especially hydration of acrylonitrile to acrylamide. The catalysts are distinguished by high mechanical stability, extended lifetime, and excellent resistance to hydration and copper leaching.
    Type: Application
    Filed: September 28, 2001
    Publication date: April 4, 2002
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Mark Donal Ryan, John Bradley Roucis, James Donald Carruthers
  • Stable highly active supported copper based catalysts
    Patent number: 6306795
    Abstract: Stable highly active supported copper based catalysts are comprised of copper oxide or elemental copper crystallites supported on mechanically stable aluminum oxide and are characterized by high surface area, small copper crystallite size, and high metal loading. The average crystallite size of the copper compound is from about 20 to about 300 Å, the copper loading is from about 10 to about 35 weight percent, the average particle diameter is from about 0.1 mm to about 10 mm, and the total surface area is from about 20 to about 400 square meters per gram. The catalysts are useful for hydration of nitriles to amides, especially hydration of acrylonitrile to acrylamide. The catalysts are distinguished by high mechanical stability, extended lifetime, and excellent resistance to hydration and copper leaching.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: October 23, 2001
    Assignee: Cytec Technology Corp.
    Inventors: Mark Donal Ryan, John Bradley Roucis, James Donald Carruthers