Patents by Inventor W. Patrick Dennler

W. Patrick Dennler 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).

  • Reaction process in hybrid reactor for propylene ammoxidation
    Patent number: 6649130
    Abstract: A hybrid reactor arrangement provides a reactive design that achieves higher acrylonitrile yield and lower catalyst circulating rate. The hybrid reactor design first passes a mixture of reactants and catalyst through a circulating bubbling bed reaction section. Heat exchange coils or other cooling medium in the bubbling bed reactor section maintain temperature in a range that will maximize the selectivity of reactants to the acrylonitrile product. The bubbling bed reactor section provides the initial conversion of the reactant. A circulating fluidized bed reaction zone finishes the conversion of reactants to a high yield under conditions that reduce the occurrence of secondary reactions that could otherwise produce unwanted by-products. The circulating fluidized bed reactor section maintains nearly plug flow conditions that allow continued conversion of unreacted feed components through primary reactions while limiting the time for secondary reactions to continue and diminish the final yield of products.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: November 18, 2003
    Assignee: UOP LLC
    Inventors: Robert L. Zhou, W. Patrick Dennler, Anil R. Oroskar, Bipin V. Vora, Hayim Abrevaya, Laurence O. Stine
  • Reaction process in hybrid reactor for propylene ammoxidation
    Patent number: 6143915
    Abstract: A hybrid reactor arrangement provides a reactive design that achieves higher acrylonitrile yield and lower catalyst circulating rate. The hybrid reactor design first passes a mixture of reactants and catalyst through a circulating bubbling bed reaction section. Heat exchange coils or other cooling medium in the bubbling bed reactor section maintain temperature in a range that will maximize the selectivity of reactants to the acrylonitrile product. The bubbling bed reactor section provides the initial conversion of the reactant. A circulating fluidized bed reaction zone finishes the conversion of reactants to a high yield under conditions that reduce the occurrence of secondary reactions that could otherwise produce unwanted by-products. The circulating fluidized bed reactor section maintains nearly plug flow conditions that allow continued conversion of unreacted feed components through primary reactions while limiting the time for secondary reactions to continue and diminish the final yield of products.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: November 7, 2000
    Assignee: UOP LLC
    Inventors: Lubo Zhou, W. Patrick Dennler, Anil R. Oroskar, Bipin V. Vora, Hayim Abrevaya, Laurence O. Stine