Patents Represented by Attorney, Agent or Law Firm Donald S. Igraham
  • Catalyst system for producing aromatic carbonates
    Patent number: 6346500
    Abstract: Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a Group VIII metal having an atomic number of at least 44, preferably palladium; an alkali metal or alkaline earth metal halide, preferably sodium bromide; and at least one aliphatic polyether such as a polyethylene glycol dimethyl ether or a crown ether. The catalyst system also preferably contains a compound of another metal, preferably lead.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: February 12, 2002
    Assignee: General Electric Company
    Inventors: Eric James Pressman, Grigorii Lev Soloveichik, Kirill Vladimirovich Shalyaev, Bruce Fletcher Johnson