Patents by Inventor Panja Kanta Rao

Panja Kanta Rao 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 enhancement of the cycle life of a zinc-chromium based catalyst in the synthesis of 2-methylpyrazine
    Patent number: 6566292
    Abstract: The present invention relates to enhancement of the cycle life of a zinc chromium based catalyst used in the synthesis of 2-methylpyrazine by increasing the reaction temperature step-wise, starting from a low temperature, while monitoring the levels of total conversion and selectivity towards pyrazine. The catalyst can be regenerated after each cycle of use without substantial loss of activity.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: May 20, 2003
    Assignee: Council of Scientific and Industrial Research
    Inventors: Sai Prasad Potharaju Seetharamanjaneya, Kondapuram Vijaya Raghavan, Panja Kanta Rao, Shivanand Janardan Kulkarni, Katabathini Narasimha Rao, Rajesh Gopinath, Suresh Farsinavis, Harshadas Mitaram Meshram
  • Process for the enhancement of the cycle life of a zinc-chromium based catalyst in the synthesis of 2-methylpyrazine
    Publication number: 20020143180
    Abstract: The present invention relates to enhancement of the cycle life of a zinc chromium based catalyst used in the synthesis of 2-methylpyrazine by increasing the reaction temperature step-wise, starting from a low temperature, while monitoring the levels of total conversion and selectivity towards pyrazine. The catalyst can be regenerated after each cycle of use without substantial loss of activity.
    Type: Application
    Filed: March 27, 2001
    Publication date: October 3, 2002
    Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH
    Inventors: Sai Prasad Potharaju Seetharamanjaneya, Kondapuram Vijaya Raghavan, Panja Kanta Rao, Shivanand Janardan Kulkarni, Katabathini Narasimha Rao, Rajesh Gopinath, Suresh Farsinavis, Harshadas Mitaram Meshram
  • 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
  • Process for the preparation of a highly active and selective ammoxidation catalyst and its use in preparing heteroaromatic nitriles
    Patent number: 5910465
    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 12, 1996
    Date of Patent: June 8, 1999
    Assignee: Council of Scientific & Industrial Research
    Inventors: Panja Kanta Rao, Kamaraju Seetha Rama Rao, Vattikonda Venkata Rao, Kalavaru Venkata Narayana, Akula Venugopal, Alla Venkata Rama Rao, Machiraju Subrahmanyam