Patents by Inventor Manikandan Palanichamy

Manikandan Palanichamy 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 preparation of cyclic carbonate
    Patent number: 6924379
    Abstract: A catalytic system comprising of Zinc-substituted polyoxometalate, Na12[WZn3(H2O)2(ZnW9O34)2].48H2O and a Lewis base has been discovered to be efficient for chemical fixation of CO2 with epoxides (I) to form cyclic carbonates of structure II as given below: wherein R is selected from a halogen atom, aliphatic and aromatic group. The reaction was carried out at moderate CO2 pressure of 60 psig and in the temperature range 100-140° C. with very high turn number of more than 40,000, with nearly a quantitative conversion and 95-99% selectivity. The Zinc-substituted polyoxometalate catalyst is easy to separate after the reaction by filtration and reusable for many cycles. The reaction can be carried out without any solvent.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: August 2, 2005
    Assignee: Council of Scientific and Industrial Research
    Inventors: Manikandan Palanichamy, Sankar Meenakshisundaram
  • Process for preparation of cyclic carbonate
    Publication number: 20040242903
    Abstract: A catalytic system comprising of Zinc-substituted polyoxometalate, Na12[WZn3(H2O)2(ZnW9O34)2].
    Type: Application
    Filed: May 30, 2003
    Publication date: December 2, 2004
    Applicant: COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
    Inventors: Manikandan Palanichamy, Sankar Meenakshisundaram