Patents by Inventor Ranjan Kumar Dash

Ranjan Kumar Dash 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).

  • METHOD OF CONVERTING POLY(ETHYLENE TEREPHTHALATE) TO TEREPHTHALIC ACID
    Publication number: 20240417356
    Abstract: A method of converting poly(ethylene terephthalate) to terephthalic acid includes a glycolysis step in which poly(ethylene terephthalate) is reacted with ethylene glycol in the presence of zinc acetate catalyst, a hydrolysis step in which the product of the glycolysis step is reacted with an alkali metal hydroxide to produce an alkali metal salt of terephthalic acid, and an acidification step in which the product of the hydrolysis step is acidified to yield a precipitate containing terephthalic acid. Each step of the method can be conducted at ambient or near-ambient pressure, and the method produces terephthalic acid in high yield and high purity.
    Type: Application
    Filed: November 7, 2022
    Publication date: December 19, 2024
    Inventors: Lohith KENCHAIAH, Vinod KONAGHATTA NARAYANACHAR, Ranjan Kumar DASH, Hariharan RAMALINGAM, Guarav MEDIRATTA
  • PROCESS FOR PRODUCING NANOPOROUS CARBIDE-DERIVED CARBON WITH INCREASED GAS STORAGE CAPABILITY
    Publication number: 20090301902
    Abstract: Methods for producing and using nanoporous carbide-derived carbon in applications involving gas storage are provided.
    Type: Application
    Filed: June 1, 2006
    Publication date: December 10, 2009
    Inventors: Yury Gogotsi, Gleb Yushin, Ranjan Kumar Dash, John E. Fisher