Patents Assigned to Codelco-Chile
  • Collector agent for the recovery of metal values in sulphide ores by froth flotation
    Patent number: 4220524
    Abstract: A collector agent for use in froth flotation processes to recover metal values of sulphide ores is disclosed which agent comprises the reaction product resulting from mixing and reacting in the presence of visible light, heat, or both, a mixture of:(i) a mixture of hydrocarbons having from 5 to 10 (inclusive) carbon atoms,(ii) methyl isobutyl carbinol (MIBC),(iii) ethyl xanthyl ethylformic ester (EEF), and(iv) elemental sulphur (S).
    Type: Grant
    Filed: January 13, 1978
    Date of Patent: September 2, 1980
    Assignee: Codelco-Chile
    Inventor: Raul Poblete