Patents by Inventor Subhash D. Sansare

Subhash D. Sansare 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).

  • Patent number: 5756421
    Abstract: The invention relates to a process for the preparation of novel composite catalysts useful for the oxidative conversion of methane to synthesis gas. The catalysts are represented by the formula: T.sub.m AO.sub.n, wherein T is a transition metal or metals, m is equal to the T/A mole ratio and is from 0.01 to 100, A is an alkaline earth metal or metals, O is oxygen and n is the number of oxygen atoms needed to form a catalyst composite wherein each element of the composite has a complete set of valence electrons. The process includes mixing compounds containing the transition metal or metals in finely ground form with the compounds containing the alkaline earth metals or metals in finely ground form in a T/A mole ratio of about 0.01 to about 100, heating the mixture to dryness at a temperature of about 80.degree. to 250.degree. C., decomposing the dried mixture at a temperature of about 400.degree. to 1200.degree. C.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: May 26, 1998
    Assignee: Council of Scientific & Industrial Research
    Inventors: Vasant R. Choudhary, Amarjeet M. Rajput, Subhash D. Sansare, Bathula Prabhakar, Ajit S. Mamman
  • Patent number: 5338488
    Abstract: The invention relates to a process for the production of synthesis gas by oxidative conversion of methane using composite catalysts having the formula: T.sub.m AO.sub.n, wherein T is a transition metal or metals, m is the T/A mole ratio and is from 0.01 to 100, A is an alkaline earth metal or metals, O is oxygen and n is the number of oxygen atoms needed to form a catalyst composite wherein each element of the composite has a complete set of valence electrons. In a preferred embodiment, the process includes passing a gas containing methane and oxygen over the composite catalyst in a fixed bed reactor at a pressure in the range of 0.5-50 atm, and at a temperature in the range of 200.degree.-1000.degree. C., and recovering the synthesis gas.
    Type: Grant
    Filed: September 10, 1992
    Date of Patent: August 16, 1994
    Assignee: Council of Scientific Research
    Inventors: Vasant R. Choudhary, Amarjeet M. Rajput, Subhash D. Sansare, Bathula Prabhakar, Ajit S. Mamman
  • Patent number: 5336825
    Abstract: This invention discloses an improved integrated two step process for conversion of methane to liquid hydrocarbons of gasoline range. The invention particularly comprises catalytic oxidative conversion of methane with free oxygen to ethylene and higher olefins containing gaseous product in the first step and catalytic conversion of the olefins from the product stream of the first step without separating them to liquid hydrocarbons of gasoline range in the second step, for the conversion of methane to liquid hydrocarbons. The process of the present invention could be used in the petroleum industry for the production of gasoline and liquid hydrocarbon fuels and aromatic hydrocarbons.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: August 9, 1994
    Assignee: Council of Scientific & Industrial Research
    Inventors: Vasant R. Choudhary, Subhash D. Sansare, Sopan T. Chaudhari
  • Patent number: 5306854
    Abstract: The invention discloses a two step process for conversion of natural gas to liquid hydrocarbons of gasoline range comprising oxidation pyrolysis of natural gas olefins containing gaseous products in the first stage and conversion of the olefins, formed in the first step, without separating them from the gaseous product stream to liquid hydrocarbons of gasoline range in the second step. The process of the invention could be used in petrolium industries for producing gasoline liquid hydrocarbon fuels and aromatic hydrocarbons. The present invention is commercially viable and energy efficient.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: April 26, 1994
    Assignee: Council of Scientific & Industrial Research
    Inventors: Vasant R. Choudhary, Subhash D. Sansare, Amarjeet M. Rajput