Patents Assigned to Imetal
  • Hydrometallurgical treatment process for extracting constituent metal values from ferro-nickel
    Patent number: 4016054
    Abstract: The present invention relates to a hydrometallurgical treatment process for extracting, in a pure (elemental) or other valuable (i.e. commercially usable) form, constituent metals from ferro-nickel, that is nickel, cobalt, iron and sometimes chromium.
    Type: Grant
    Filed: July 10, 1975
    Date of Patent: April 5, 1977
    Assignee: Imetal
    Inventors: Louis Gandon, Jean-Michel Demarthe
  • Method of reclaiming nickel values from a nickeliferous alloy
    Patent number: 3992270
    Abstract: A method and apparatus for reclaiming nickel values from a nickeliferous alloy in which the nickeliferous alloy is subjected to nitric lixiviation and the nickel values are recovered from the resulting nickel nitrate solution.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: November 16, 1976
    Assignee: Imetal
    Inventors: Robert Lemarinel, Jean-Michel Demarthe, Louis Gandon