Patents Assigned to Qualchem, Inc.
  • Fluidized-bed roasting of molybdenite concentrates
    Patent number: 6190625
    Abstract: The present invention provides a method for fluidized bed roasting of molybdenite to molybdenum trioxide. A fluid bed reactor separated into separate zones is used to provide plug flow conditions. A cooling tube is submerged in the fluid bed to control temperature. A vibrator is used to enhance fluidization.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: February 20, 2001
    Assignee: Qualchem, Inc.
    Inventors: Mahesh C. Jha, William A. May