Patents by Inventor Gilbert L. Colbert

Gilbert L. Colbert 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).

  • Parallel hydrodesulfurization of naphtha and distillate streams with passage of distillate overhead as reflux to the naphtha distillation zone
    Patent number: 4116816
    Abstract: In a hydrodesulfurization process having separate naphtha and distillate hydrodesulfurization zones, volatile fractions of the distillate hydrodesulfurization effluent are recycled to the naphtha feed stream before it combines with the hydrogen stream and enters the hydrodesulfurization zone and heavy fractions separated from the naphtha hydrodesulfurization effluent are combined with a diesel fuel oil fraction separated from the distillate hydrodesulfurization effluent. Alternatively, light fractions separated from the distillate hydrodesulfurization effluent are combined with a condensed liquid stream being returned to a distillation fractionation zone separating light fractions from the naphtha hydrodesulfurization effluent.
    Type: Grant
    Filed: March 1, 1977
    Date of Patent: September 26, 1978
    Assignee: Phillips Petroleum Company
    Inventors: Edgar D. Davis, Gilbert L. Colbert