Patents by Inventor David Chapamn

David Chapamn 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).

  • Sulfur resistant cladded titania—alumina supports
    Patent number: 9409149
    Abstract: The present invention is directed to a method of forming titania clad high surface area alumina suitable as a support for forming noble metal catalysts. The resultant catalysts exhibit resistance to poisoning by sulfurous materials and, therefore, are useful in applications directed to internal combustion engine emission conversion and the like. The present invention provides a commercially feasible and cost effective method of forming a highly desired support for noble metal catalyst application. The process comprises forming a slurry of porous alumina particulate suitable as a catalyst support for the intended application, mixing said slurry with a solution of titanyl sulfate having a pH of about 1, increasing the pH of the mixed slurry/solution at a slow rate of from 0.05 to 0.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: August 9, 2016
    Assignee: W. R. GRACE & CO.-CONN.
    Inventors: Manoj Mukund Koranne, David Chapamn
  • SULFUR RESITANT CLADDED TITANIA-ALUMINA SUPPORTS
    Publication number: 20120190541
    Abstract: The present invention is directed to a method of forming titania clad high surface area alumina suitable as a support for forming noble metal catalysts. The resultant catalysts exhibit resistance to poisoning by sulfurous materials and, therefore, are useful in applications directed to internal combustion engine emission conversion and the like. The present invention provides a commercially feasible and cost effective method of forming a highly desired support for noble metal catalyst application. The process comprises forming a slurry of porous alumina particulate suitable as a catalyst support for the intended application, mixing said slurry with a solution of titanyl sulfate having a pH of about 1, increasing the pH of the mixed slurry/solution at a slow rate of from 0.05 to 0.
    Type: Application
    Filed: October 1, 2010
    Publication date: July 26, 2012
    Inventors: Manoj Mukund Koranne, David Chapamn