Patents Assigned to Huntsman Petrochemical Corp.
  • Depressant for flotation separation of polymetallic sulphide ores
    Patent number: 5693692
    Abstract: A new depressant for use in enhanced separation of polymetallic sulphides is described. The depressant agent is used in conjunction with conventional collector agents and frothing agents in the flotation separation of copper, nickel, lead, zinc sulphides by depressing iron sulphides such as pyrrhotite, pyrite and marcasite in the tailing. The depressant consists of a chemically-modified carbohydrate polymer, a polyacrylate and low foaming lignin sulphonate.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: December 2, 1997
    Assignees: Huntsman Petrochemical Corp., Falconbridge Limited
    Inventors: Srdjan Bulatovic, Tim M. Jessup, James F. Jackson, Gordon Leighton