Patents by Inventor Patrizia Primerano

Patrizia Primerano 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 the high-yield recovery of vanadium from petroleum combustion residues
    Patent number: 4814150
    Abstract: A process for the high-yield recovery of vanadium from petroleum combustion residues, wherein these residues are: (a) subjected to attach with sodium hydroxide in the presence of an oxidizer, or (b) impregnated with sodium hydroxide, dried at 100.degree.-250.degree. C. and leached with water, to selectively extract vanadium with high yields. The vanadium is precipitated from the alkaline extract by adding H.sub.2 SO.sub.4 up to pH.apprxeq.2 and an ammonium salt. The precipitated ammonium polyvanadate is calcinated to vanadium pentoxide.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: March 21, 1989
    Assignee: Ente Minerario Siciliano
    Inventors: Francesco Corigliano, Sebastiana Di Pasquale, Patrizia Primerano, Cesare Zipelli
  • Method for recovering vanadium from residues from the combustion of petroleum fractions
    Patent number: 4788044
    Abstract: A method is described for recovering vanadium from residues from the combustion of petroleum fractions, wherein the residues, such as ash and soot, are leached with aqueous H.sub.2 SO.sub.4 to extract vanadium and any additional polyvalent cations contained therein. The acid leaching solution, after oxidation of the extracted cations, is treated with a complexing agent, in particular EDTA or salts thereof, and then with ammonia to selectively precipitate vanadium as highly pure ammonium polyvanadate.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: November 29, 1988
    Assignee: Ente Minerario Siciliano
    Inventors: Francesco Corigliano, Sebastiana Di Pasquale, Patrizia Primerano, Cesare Zipelli