Patents by Inventor Wilfred F. Shum

Wilfred F. Shum 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).

  • Epoxidation process
    Patent number: 5166372
    Abstract: Olefins are epoxidized by hydrogen peroxide in the presence of an organorhenium oxide catalyst and an alkyl aryl secondary alcohol solvent. High yields of epoxides with minimal non-selective loss of either hydrogen peroxide or olefin are realized. The epoxidation may comprise one step of an integrated process wherein an oxidant mixture is generated by molecular oxygen oxidation of the alkyl aryl secondary alcohol and used directly in the epoxidation without further purification or extraction.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: November 24, 1992
    Assignee: Arco Chemical Technology, L.P.
    Inventors: Guy L. Crocco, Wilfred F. Shum, John G. Zajacek, Haven S. Kesling, Jr.