Patents by Inventor Patricia Suemar Mello Duarte Da Cunha

Patricia Suemar Mello Duarte Da Cunha 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 reducing the naphthenic acidity of petroleum oils or their fractions
    Patent number: 7507329
    Abstract: A process for reducing the naphthenic acidity of petroleum oils or their fractions is described, said process comprising providing a hydrocarbon feed 103/203/303 having between 0.1 and 99 wt % of emulsified/dispersed water in oil, said feed containing salts and a content of naphthenic acids measured as TAN between 0.1 and 10 mg KOH/g oil; directing the said petroleum oil feed and emulsified/dispersed water towards an energy emitter device in the microwave range and submitting said feed 103/203/303 in liquid phase, under pressure between 0.7 and 4.5 MPa at temperatures between 50° C. and 350° C.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: March 24, 2009
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Andrea de Rezende Pinho, Raquel Campos Cauby Coutinho, Mauri José Baldini Cardoso, Elizabeth Marques Moreira, Patricia Suemar Mello Duarte Da Cunha, Gabriele Poly Alt Pereira Naves