Patents by Inventor Hugh J. Parkhurst, Jr.

Hugh J. Parkhurst, Jr. 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).

  • Lignin hydrocracking process to produce phenol and benzene
    Patent number: 4420644
    Abstract: A lignin-containing feed material in particulate form is mixed with a process-derived slurrying oil and fed into an ebullated catalyst bed hydrocracking reactor. Reaction conditions are maintained at 650.degree.-850.degree. F. temperature, 500-2500 psig hydrogen partial pressure and space velocity of 1.0-10 wt. lignin/hr./wt. catalyst. The reaction products are phase separated to recover hydrogen and slurrying oil, and the resulting liquid stream is passed to a thermal hydrodealkylation step. The reacted stream is fractionated to produce phenol and benzene products, along with a heavy alkylated material which is recycled to the hydrodealkylation step to increase the yield of phenol and benzene.
    Type: Grant
    Filed: August 24, 1981
    Date of Patent: December 13, 1983
    Assignee: Hydrocarbon Research, Inc.
    Inventors: Derk T. A. Huibers, Hugh J. Parkhurst, Jr.