Patents Assigned to Oronzio de Nora Impianti Electtrochimici S.p.A.
  • Low oxygen overvoltage lead anodes
    Patent number: 4604173
    Abstract: Anodes made of lead or lead alloys, used for the evolution of oxygen from sulphuric acid solutions, particularly in metal electrowinning processes, are made more catalytic by treating them in an oxidizing bath of hydrated molten salts, in particular comprising highly oxidizing persalts or nitrates, of cobalt, iron and nickel.After treatment, the anodes exhibit an extraordinary low oxygen overvoltage and allow a considerable saving of energy in comparison with untreated anodes.
    Type: Grant
    Filed: August 7, 1985
    Date of Patent: August 5, 1986
    Assignee: Oronzio de Nora Impianti Electtrochimici, S.p.A.
    Inventors: Antonio Nidola, Oronzio de Nora
  • Bipolar electrode construction
    Patent number: 4108756
    Abstract: Novel vertical multiunit electrolyzers with bipolar metallic electrodes for the electrolysis of halide containing electrolytes to produce oxidized halogen compounds and to a novel electrolysis of electrolytes which is designed to produce a gas lift effect to sweep solid deposits off the electrodes and out of the electrolyzer.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: August 22, 1978
    Assignee: Oronzio de Nora Impianti Electtrochimici S.p.A.
    Inventors: Oronzio de Nora, Vittorio DE Nora, Placido M. Spaziante