Patents by Inventor Pamela A. Yanchik

Pamela A. Yanchik 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).

  • Removal of aromatic color bodies from aromatic hydrocarbon streams
    Patent number: 5207894
    Abstract: This invention provides a process to remove aromatic color bodies, particularly oxygen or sulfur containing aromatics from a C.sub.8-11 aromatic hydrocarbon stream having a boiling range between about 160.degree.-460.degree. F. The process involves contacting the hydrocarbon stream with a neutral attapulgite clay for a time sufficient to adsorb the aromatic color bodies. The process is effective in reducing the APHA color value of the subject hydrocarbon stream from an initial 850-1100 value to about 400 or less.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: May 4, 1993
    Assignee: Lyondell Petrochemical Company
    Inventors: Stewart H. Presnall, Robert J. Haynal, Beverly B. Slimp, Jr., Martin P. Grosboll, Pamela A. Yanchik