Patents by Inventor George Stefanidakis

George Stefanidakis 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).

  • Removal of surfactants from hydrocarbons with alcohol
    Patent number: 4430204
    Abstract: A method is disclosed for removing hydrocarbon-soluble anionic surfactants from gasoline or kerosene boiling range hydrocarbons. The method comprises (a) contacting a hydrocarbon mixture containing surfactants with a lower alcohol which is miscible with the hydrocarbon mixture to extract the surfactants; (b) contacting the mixture with water or caustic solution to extract the lower alcohol and surfactants from the hydrocarbon mixture; (c) separating the water or caustic solution from the hydrocarbons; and (d) removing the hydrocarbons.
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: February 7, 1984
    Assignee: Shell Oil Company
    Inventors: Robert P. Aiello, George Stefanidakis, Dwayne E. Poling