Patents by Inventor Theresa A. Lelain

Theresa A. Lelain 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).

  • Nitrogen removal from olefinic naphtha feedstreams to improve hydrodesulfurization versus olefin saturation selectivity
    Patent number: 7357856
    Abstract: A two stage process for selectively hydrodesulfurizing olefinic and sulfur and nitrogen-containing naphtha feedstreams wherein the first stage is a nitrogen removal stage to produce a naphtha feedstream having reduced levels of nitrogen compounds and a second stage wherein the naphtha feedstream having reduced levels of nitrogen compounds is hydrodesulfuried with a catalyst and under conditions selective to remove sulfur with minimum olefin saturation.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: April 15, 2008
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Peter W. Jacobs, Garland B. Brignac, Thomas R. Halbert, Madhav Acharya, Theresa A. Lelain