Patents Assigned to Bernard Lewis
  • Patent number: 4146389
    Abstract: The thermal reduction process for producing metals such as aluminum in a reactor utilizes a dispersed discharge to provide the heat of reaction within the reaction zone in the presence of aluminum vapor to maintain the temperature in excess of 2000.degree. C. The aluminum oxide powder and a reductant in a gaseous medium are introduced with a tangential component into the reactor to create a vortex motion. A minimum turbulence level within the reactor in the reaction zone is maintained so as to keep the solid particles in suspension and prevent the dispersed discharge from forming electrical arcs. Aluminum oxide is reduced to aluminum vapor which is removed with the effluent stream of gases from the reaction zone. Thereafter, the effluent is rapidly passed through a condenser where the temperature is dropped to liquefy the aluminum vapor which is then discharged in a continuous stream.
    Type: Grant
    Filed: October 18, 1977
    Date of Patent: March 27, 1979
    Assignees: Bela Karlovitz, Bernard Lewis
    Inventor: Bela Karlovitz
  • Patent number: D338649
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: August 24, 1993
    Assignees: Bernard Lewis, Punch S. Kuny
    Inventor: Lawrence I. Kuny