Patents Assigned to Societe Metallurgique le Nichel-S.L.N.
  • Hydrometallurgical process for treating nickel mattes
    Patent number: 4236981
    Abstract: This invention provides a process for treating a nickel matte to recover essentially pure nickel comprising: treating an aqueous mixture of the matte with chlorine to produce a solid residue and an aqueous lixiviating solution having a pH value which is substantially nil or positive; treating the lixiviating solution to produce a solution containing primarily nickel chloride; and electrolyzing the solution to recover pure nickel at the cathode.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: December 2, 1980
    Assignee: Societe Metallurgique le Nichel-S.L.N.
    Inventors: Jean-Michel Demarthe, Louis Gandon, Monique Goujet