Patents by Inventor William Randolph Leyendecker

William Randolph Leyendecker 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).

  • Nitrile process
    Patent number: 6084121
    Abstract: A process for purifying a nitrile such as acrylonitrile is disclosed. The process comprises (1) contacting a product mixture, which comprises acrylonitrile and hydrogen cyanide, with glycolic acid or a glycolic acid-generating compound to produce a glycolic acid-treated product; and (2) recovering the nitrile from the glycolic acid-treated product. The product mixture can be produced by contacting ammonia with an olefin under a condition effective to produce a nitrile and hydrogen cyanide.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: July 4, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Janet Marie Rogers, William Randolph Leyendecker, Robert Clifford Blackstone