Patents by Inventor Nitin Chadda

Nitin Chadda 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).

  • Integrated process for preparing a carboxylic acid from an alkane
    Patent number: 8080686
    Abstract: The present invention relates to an integrated process for producing unsaturated carboxylic acids from the corresponding C2-C4 alkane. The process begins with performance of thermally integrated dehydrogenation reactions which convert a C2-C4 alkane to its corresponding C2-C4 alkene, and which involve exothermically converting a portion of an alkane to its corresponding alkene by oxidative dehydrogenation in an exothermic reaction zone, in the presence of oxygen and a suitable catalyst, and then feeding the products of the exothermic reaction zone to an endothermic reaction zone wherein at least a portion of the remaining unconverted alkane is endothermically dehydrogenated to form an additional quantity of the same corresponding alkene, in the presence of carbon dioxide and an other suitable catalyst.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: December 20, 2011
    Assignee: Rohm and Haas Company
    Inventors: Abraham Benderly, Nitin Chadda, Douglass Sevon
  • Method for producing unsaturated carboxylic acids and nitriles
    Patent number: 7880027
    Abstract: The present invention relates to an improved alkane (amm)oxidation process in which sulfur-bearing impurities present in the alkane feedstock are removed upstream from the (amm)oxidation reaction.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: February 1, 2011
    Assignee: Rohm and Haas Company
    Inventors: Nitin Chadda, Scott Han, Andrew Michael Lemonds
  • Integrated process for preparing a carboxylic acid from an alkane
    Publication number: 20090171109
    Abstract: The present invention relates to an integrated process for producing unsaturated carboxylic acids from the corresponding C2-C4 alkane. The process begins with performance of thermally integrated dehydrogenation reactions which convert a C2-C4 alkane to its corresponding C2-C4 alkene, and which involve exothermically converting a portion of an alkane to its corresponding alkene by oxidative dehydrogenation in an exothermic reaction zone, in the presence of oxygen and a suitable catalyst, and then feeding the products of the exothermic reaction zone to an endothermic reaction zone wherein at least a portion of the remaining unconverted alkane is endothermically dehydrogenated to form an additional quantity of the same corresponding alkene, in the presence of carbon dioxide and an other suitable catalyst.
    Type: Application
    Filed: December 11, 2008
    Publication date: July 2, 2009
    Inventors: Abraham Benderly, Nitin Chadda, Douglass Sevon
  • Process for the selective (amm)oxidation of lower molecular weight alkanes and alkenes
    Patent number: 7553986
    Abstract: An improved process for the production of unsaturated carboxylic acids and unsaturated nitrites from their corresponding C3 to C5 alkanes, or mixtures of C3 to C5 alkanes and alkenes, that involves a multi-stage reaction system which employs both separation of the oxidation product from one or more intermediate effluent streams, as well as feeding additional oxygen to reaction zones subsequent to the first reaction zone.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: June 30, 2009
    Assignee: Rohm and Haas Company
    Inventors: Leonard Edward Bogan, Jr., Fernando A. P. Cavalcanti, Nitin Chadda, Sanjay Chaturvedi, Anne Mae Gaffney, Scott Han, Peter D. Klugherz, Daniel Martenak, Mark Anthony Silvano, Elsie Mae Vickery, Donald L. Zolotorofe
  • Method for producing unsaturated carboxylic acids and nitriles
    Publication number: 20090054678
    Abstract: The present invention relates to an improved alkane (amm)oxidation process in which sulfur-bearing impurities present in the alkane feedstock are removed upstream from the (amm)oxidation reaction.
    Type: Application
    Filed: August 20, 2008
    Publication date: February 26, 2009
    Inventors: Nitin Chadda, Scott Han, Andrew Michael Lemonds
  • Process for the selective (AMM)oxidation of lower molecular weight alkanes and alkenes
    Publication number: 20050137415
    Abstract: An improved process for the production of unsaturated carboxylic acids and unsaturated nitrites from their corresponding C3 to C5 alkanes, or mixtures of C3 to C5 alkanes and alkenes, that involves a multi-stage reaction system which employs both separation of the oxidation product from one or more intermediate effluent streams, as well as feeding additional oxygen to reaction zones subsequent to the first reaction zone.
    Type: Application
    Filed: November 19, 2004
    Publication date: June 23, 2005
    Inventors: Leonard Bogan, Fernando Cavalcanti, Nitin Chadda, Sanjay Chaturvedi, Anne Gaffney, Scott Han, Peter Klugherz, Daniel Martenak, Mark Silvano, Elsie Vickery, Donald Zolotorofe
  • Catalyst systems for converting alkanes to alkenes and to their corresponding oxygenated products
    Publication number: 20050131255
    Abstract: Alkenes, unsaturated saturated carboxylic acids, saturated carboxylic acids and their higher analogues are prepared directly from corresponding alkanes utilizing using a mixed bed catalyst at flame temperatures in a short contact time reactor.
    Type: Application
    Filed: November 12, 2004
    Publication date: June 16, 2005
    Inventors: Abraham Benderly, Nitin Chadda, Anne Gaffney, Scott Han, Dominique Le, Mark Silvano