Patents Assigned to Anglo American Platinum Limited
  • Separation of platinum group metals
    Patent number: 6364931
    Abstract: A hydrochloric acid solution containing platinum group metals has its acidity adjusted to 5.5 to 6.5M HCl and its redox potential adjusted to at least 500 mV, before being treated by chromatography. Particularly clean separation of at least Pt and Pd can be obtained, and recovered Pt and Pd of at least 99.99% purity may be obtained by following conventional precipitation processes.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: April 2, 2002
    Assignee: Anglo American Platinum Limited
    Inventors: David John Robinson, Natalie Jean Shackleton