Patents by Inventor Carmelita Roncaldier

Carmelita Roncaldier 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 producing metallic lead starting from desulfurized pastel
    Patent number: 8409421
    Abstract: The present invention relates to an electrolytic process for producing metallic lead starting from desulfurized lead pastel comprising the following operative phases: a) leaching the desulfurized pastel by putting it in contact with a solution comprising ammonium chloride, with the formation of a leach liquor and evolution of gaseous CO2; b) separating a first solid residue and a first clarified leach liquor from the leach liquor coming from phase a); c) leaching the solid residue separated in phase b) by putting it in contact with a solution comprising ammonium chloride and hydrogen peroxide; d) separating a second solid residue and a second clarified leach liquor from the leach liquor coming from phase c); e) joining the first clarified leach liquor coming from phase b) with the second clarified leach liquor coming from phase d) and forming a single solution; f) subjecting the solution leaving phase e) to electrolysis in a flow cell, with a current density ranging from 50 to 10,000 A/m2, said electrolysis r
    Type: Grant
    Filed: November 27, 2008
    Date of Patent: April 2, 2013
    Assignee: Engitec Technologies S.p.A.
    Inventors: Massimo Maccagni, Silvano Cossali, Carmelita Roncaldier, Carlo Olper, Luigi Olper, Alessandro Olper
  • PROCESS FOR PRODUCING METALLIC LEAD STARTING FROM DESULFURIZED PASTEL
    Publication number: 20110083970
    Abstract: The present invention relates to an electrolytic process for producing metallic lead starting from desulfurized lead pastel comprising the following operative phases: a) leaching the desulfurized pastel by putting it in contact with a solution comprising ammonium chloride, with the formation of a leach liquor and evolution of gaseous CO2; b) separating a first solid residue and a first clarified leach liquor from the leach liquor coming from phase a); c) leaching the solid residue separated in phase b) by putting it in contact with a solution comprising ammonium chloride and hydrogen peroxide; d) separating a second solid residue and a second clarified leach liquor from the leach liquor coming from phase c); e) joining the first clarified leach liquor coming from phase b) with the second clarified leach liquor coming from phase d) and forming a single solution; f) subjecting the solution leaving phase e) to electrolysis in a flow cell, with a current density ranging from 50 to 10,000 A/m2, said electrolysis r
    Type: Application
    Filed: November 27, 2008
    Publication date: April 14, 2011
    Applicant: ENGITEC TECHNOLOGIES S.p.A.
    Inventors: Marco Olper, Carmelita Roncaldier, Carlo Olper, Luigi Olper, Alessandro Olper, Massimo Maccagni, Silvano Cossali