Patents by Inventor Giane Ribeiro Stuart

Giane Ribeiro Stuart 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).

  • Process for selective hydrodesulfurization of naphtha
    Patent number: 7785461
    Abstract: A process for the selective hydrodesulfurization of a naphtha containing olefins and organosulfur compounds is disclosed, which minimizes the hydrogenation of the olefins and results in a product with a low sulfur content. The process involves a two-stage hydrodesulfurization with H2S removed from the first stage effluent. A flow of hydrogen and at least one added non-reactive compound is fed into the first stage, wherein the H2 molar fraction ranges from 0.2 to 1.0, and with H2S at the reactor intake limited to a maximum of 0.1% by volume. The second stage involves a feedstream of hydrogen and at least one added non-reactive compound, wherein the H2 molar fraction ranges from 0.2 to 0.7 and with H2S at the reactor intake limited to a maximum of 0.05% by volume.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: August 31, 2010
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Rafael Menegassi De Almeida, Jefferson Roberto Gomes, Marcelo Edral Pacheco, Marcus Vinicius Eiffle Duarte, Rogerio Oddone, Giane Ribeiro Stuart