Patents Assigned to Placer Dome Technical Services, Ltd.
  • Autoclave using agitator and sparge tube to provide high oxygen transfer rate to metal-containing solutions
    Patent number: 6368381
    Abstract: The autoclave of the present invention includes an impeller having a conduit to recirculate or introduce a molecular oxygen-containing gas into the slurry. The outlets for the gas can be located in the blades of the impeller for thorough dispersion of the gas bubbles in the slurry. A sparge tube for introducing an additional molecular oxygen-containing gas into the slurry can be used in conjunction with the impeller to provide a high molecular oxygen transfer rate to the slurry.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: April 9, 2002
    Assignee: Placer Dome Technical Services, Ltd.
    Inventors: James A. King, Jinxing Ji