Patents by Inventor Vijaya Kasireddy

Vijaya Kasireddy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Recycling of spent pot linings
    Patent number: 6596252
    Abstract: A process is described for the treatment of spent pot lining material from electrolyte reduction cells, this spent material having a substantial content of cryolite. The spent material is first leached with water at a dilution and a time sufficient to dissolve substantially all water soluble fluorides, after which the solid residue is separated from the liquid. The solid residue obtained is then subjected to a caustic leach with an aqueous sodium hydroxide solution containing about 20 to 50 g/L of NaOH and thereafter the solid residue is separated from the liquid.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: July 22, 2003
    Assignee: Alcan International Limited
    Inventors: Vijaya Kasireddy, Jean-Luc Bernier, Frank M. Kimmerle
  • Recycling of spent pot linings
    Publication number: 20020114748
    Abstract: A process is described for the treatment of spent pot lining material from electrolyte reduction cells, this spent material having a substantial content of cryolite. The spent material is first leached with water at a dilution and a time sufficient to dissolve substantially all water soluble fluorides, after which the solid residue is separated from the liquid. The solid residue obtained is then subjected to a caustic leach with an aqueous sodium hydroxide solution containing about 20 to 50 g/L of NaOH and thereafter the solid residue is separated from the liquid.
    Type: Application
    Filed: December 8, 2000
    Publication date: August 22, 2002
    Inventors: Vijaya Kasireddy, Jean-Luc Bernier, Frank M. Kimmerle