Patents by Inventor Chandrashekhar Pandurang Kelkar

Chandrashekhar Pandurang Kelkar 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).

  • Rare earth-containing attrition resistant vanadium trap for catalytic cracking catalyst
    Patent number: 10066170
    Abstract: The present invention provides a metal passivator/trap comprising a rare earth oxide dispersed on a matrix containing a calcined hydrous kaolin.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: September 4, 2018
    Assignee: BASF CORPORATION
    Inventors: Qi Fu, Walter Babbitt, Mark Schmalfeld, Chandrashekhar Pandurang Kelkar
  • Rare Earth-Containing Attrition Resistant Vanadium Trap For Catalytic Cracking Catalyst
    Publication number: 20170253810
    Abstract: The present invention provides a metal passivator/trap comprising a rare earth oxide dispersed on a matrix containing a calcined hydrous kaolin.
    Type: Application
    Filed: May 1, 2017
    Publication date: September 7, 2017
    Inventors: Qi Fu, Walter Babbitt, Mark Schmalfeld, Chandrashekhar Pandurang Kelkar
  • Rare earth-containing attrition resistant vanadium trap for catalytic cracking catalyst
    Patent number: 9637688
    Abstract: The present invention provides a metal passivator/trap comprising a rare earth oxide dispersed on a matrix containing a calcined hydrous kaolin.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: May 2, 2017
    Assignee: BASF Corporation
    Inventors: Qi Fu, Walter Babbitt, Mark Schmalfeld, Chandrashekhar Pandurang Kelkar
  • Rare Earth-Containing Attrition Resistant Vanadium Trap For Catalytic Cracking Catalyst
    Publication number: 20150175901
    Abstract: The present invention provides a metal passivator/trap comprising a rare earth oxide dispersed on a matrix containing a calcined hydrous kaolin.
    Type: Application
    Filed: March 3, 2015
    Publication date: June 25, 2015
    Inventors: Qi Fu, Walter Babbitt, Mark Schmalfeld, Chandrashekhar Pandurang Kelkar
  • Phosphorus modified cracking catalysts with enhanced activity and hydrothermal stability
    Patent number: 8940652
    Abstract: A phosphorus modification of an FCC catalyst is provided by reducing the sodium content of the as formed catalyst, a first treatment with a phosphate solution, a second ammonium exchange to further reduce the sodium content of the phosphorus solution treated catalyst and a second treatment with a phosphate solution.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: January 27, 2015
    Assignee: BASF Corporation
    Inventors: Qi Fu, Chandrashekhar Pandurang Kelkar, Gary Smith, Bilge Yilmaz
  • NOreduction composition for use in FCC processes
    Patent number: 7045485
    Abstract: A composition for controlling NOx emissions during FCC processes comprises (i) an acidic oxide support, (ii) cerium oxide, (iii) a lanthanide oxide other than ceria such as praseodymium oxide, and (iv), optionally, an oxide of a metal from Groups Ib and IIb such as copper, silver and zinc.
    Type: Grant
    Filed: January 13, 2004
    Date of Patent: May 16, 2006
    Assignee: Engelhard Corporation
    Inventors: Chandrashekhar Pandurang Kelkar, David Stockwell, Samuel Tauster