Patents by Inventor Francois X. Cormerais

Francois X. Cormerais 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 deasphalting a heavy hydrocarbon feedstock
    Patent number: 4810367
    Abstract: A process for deasphalting a heavy hydrocarbon feedstock, comprising two stages of precipitation from the feedstock of an asphaltene fraction alone or, alternatively, of a resin fraction along with the asphaltene fraction, by means of a heavy solvent and a light solvent, respectively, is disclosed.In accordance with the process, the heavy solvent and the light solvent both contain, in different proportions, at least one hydrocarbon having 3 carbon atoms and at least one hydrocarbon having at least 5 carbon atoms, the proportion of the hydrocarbon having 3 carbon atoms being higher in the light solvent than in the heavy solvent.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: March 7, 1989
    Assignee: Compagnie de Raffinage et de Distribution Total France
    Inventors: Didier Chombart, Francois X. Cormerais, Michel Laborde