Patents Examined by Raymong Covington
  • Process for preparing a catalyst, the catalyst, and a use of the catalyst
    Patent number: 7538235
    Abstract: A process for preparing an epoxidation catalyst comprising silver and a high-selectivity dopant on a support, which process comprises depositing a base having a pKb of at most 3.5 when measured in water at 25° C., on the support prior to depositing silver on the support, and depositing silver and a high-selectivity dopant on the support; the epoxidation catalyst; and a process for preparing an olefin oxide by reacting an olefin with oxygen in the presence of the epoxidation catalyst.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: May 26, 2009
    Assignee: Shell Oil Company
    Inventor: John Robert Lockemeyer