Patents by Inventor Narendra Vasant Sankpal

Narendra Vasant Sankpal 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).

  • Process for recovery of sulfur from sour/natural gas using biodegradable carboxylic acid metal chelates
    Publication number: 20040192995
    Abstract: A process for recovery of sulfur from sour/natural gas stream containing H2S is described. It involves contacting the stream with an aqueous solution of biodegradable water soluble carboxylic acid metal chelate. This carboxylic acid metal chelate contains an oxidizing polyvalent metal e.g. Fe (III) and one of the acid from gluconic acid, malic acid, citric acid, succinic acid, oxalic acid. The hydrogen sulfide gas is reduced to hydrogen and elemental sulfur, which is recovered as precipitate. The iron in the metal chelate is reduced in the process and can be regenerated by oxidation.
    Type: Application
    Filed: March 25, 2003
    Publication date: September 30, 2004
    Applicant: COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
    Inventors: Aniruddha Subhash Deshpande, Narendra Vasant Sankpal, Bhaskar Dattatraya Kulkarni