Patents by Inventor Kalevaru Venkata Narayana

Kalevaru Venkata Narayana 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 the preparation of a highly active and selective ammoxidation catalyst and its use in preparing heteroaromatic nitriles
    Patent number: 5952508
    Abstract: This invention relates to a process for the preparation of highly active and selective ammoxidation catalyst of formula (VO).sub.2 P.sub.2 O.sub.7, TiO.sub.2 or (VO).sub.2 P.sub.2 O.sub.7, Al.sub.2 O.sub.3, which process comprises refluxing a vanadium source in the presence of alcohols; adding a source of phosphorous to form vanadyl pyrophosphate hydrate (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 or (VO).sub.2 P.sub.2 O.sub.7.2H.sub.2 O; Physical mixing of (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 with oxides selected from titania or alumina, and heating the resultant mixture in the presence of air at a temperature in the range of 300-600.degree. C. for a period in the range of 1 to 10 hours; and the use of said ammoxidation catalyst in the preparation of heteroaromatic nitrites.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: September 14, 1999
    Assignee: Council of Scientific & Industrial Research
    Inventors: Panja Kanta Rao, Kamaraju Seetha Rama Rao, Vattikonda Venkata Rao, Kalevaru Venkata Narayana, Akula Venugopal, Alla Venkata Rama Rao, Machiraju Subrahmanyam