Patents by Inventor Alakanada Bhattacharyya

Alakanada Bhattacharyya 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).

  • Alkaline earth metal spinel/kaolin clays and processes for making
    Patent number: 4904627
    Abstract: A process for the production of an alkaline earth metal, aluminum-containing spinel/clay composition comprises: (a) combining (1) an acidic, aluminum-containing composition in which the aluminum is present in a positively charged species, and (2) a basic, alkaline earth metal-containing composition to form a gel mixture; (b) mixing the gel with kaolin clay to form a co-gel; and (c) calcining the co-gel mixture to form the alkaline earth metal, aluminum-containing spinel composition in a clay matrix. Alkaline earth metal, aluminum-containing spinel/clays having both high surface areas and very high attrition resistance, and processes for using spinel/clay compositions, e.g., as sulfur oxide and nitrogen oxide removal agent, are also disclosed.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: February 27, 1990
    Assignee: UOP
    Inventor: Alakanada Bhattacharyya
  • Alkaline earth metal spinels and processes for making
    Patent number: 4728635
    Abstract: A process for the production of an alkaline earth metal, aluminum-containing spinel composition comprises: (a) combining (1) an acidic, aluminum-containing composition in which the aluminum is present in a positively charged species, and (2) a basic, alkaline earth metal-containing composition to form a mixture; and (b) calcining the mixture to form the alkaline earth metal, aluminum-containing spinel composition. Alkaline earth metal, aluminum-containing spinels having both high surface areas and high attrition resistance, and processes for using spinel compositions, e.g., as sulfur oxide and nitrogen oxide removal agent, are also disclosed.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: March 1, 1988
    Assignee: Katalistiks International Inc.
    Inventors: Alakanada Bhattacharyya, William E. Cormier, Jr., Gerald M. Woltermann