Patents Represented by Attorney, Agent or Law Firm Andrew Caruso
  • Catalyst composition and method for producing diaryl carbonates, using bisphosphines
    Patent number: 6617279
    Abstract: Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a Group VIIIB metal, preferably palladium; an iodide salt, preferably sodium iodide; and at least one organic bisphosphine such as 1,3-bis(diphenylphosphino)propane or 1,4-bis(diphenylphosphino)butane. The catalyst system also preferably contains a compound of cerium or lead.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: September 9, 2003
    Assignee: General Electric Company
    Inventors: Ben Purushotam Patel, Grigorii Lev Soloveichik, John Yaw Ofori