Patents by Inventor William Pleasie Nelson

William Pleasie Nelson 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).

  • Controlled continuous purification of propylene oxide by extractive distillation
    Patent number: 5830324
    Abstract: In the continuous purification of a propylene oxide feedstock contaminated with water, methanol and acetone wherein an acetone buffer is established in the column, normal distillation conditions are maintained or restored during or after an upset by continuously monitoring predetermined distillation conditions in the acetone buffer zone, and adding additional acetone to the extractive distillation column when the monitored distillation condition deviates from a predetermined value by a predetermined amount.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: November 3, 1998
    Assignee: Huntsman Specialty Chemicals Corp.
    Inventors: James Joseph Downs, Andrew Charles Hiester, Mark Elliott Taylor, Mark Allan Mueller, Michael Warren Peters, William Pleasie Nelson