Patents by Inventor A. Sarma Kovvali

A. Sarma Kovvali 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).

  • Slurry hydroconversion using enhanced slurry catalysts
    Patent number: 10035959
    Abstract: Systems and methods are provided for slurry hydroconversion of a heavy oil feed, such as an atmospheric or vacuum resid. The systems and methods allow for slurry hydroconversion using catalysts with enhanced activity and/or catalysts that can be recycled as a side product from a complementary refinery process.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: July 31, 2018
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Ramanathan Sundararaman, Thomas Francis Degnan, Jr., Rustom Merwan Billimoria, Natalie Ann Fassbender, Manuel A. Francisco, Anjaneya Sarma Kovvali, Randolph J. Smiley, John Peter Greeley, William Ernest Lewis, Roby Bearden, Jr.
  • Slurry hydroconversion and coking of heavy oils
    Patent number: 9868915
    Abstract: Systems and methods are provided for use of coking and slurry hydroconversion for conversion of heavy oil feeds. The combination of coking and slurry hydroconversion allows for improved yield of liquid products while reducing or minimizing the consumption of hydrogen in slurry hydroconversion reaction stages. Coking and slurry hydroconversion can be combined by segregating feeds based on Conradson carbon residue. Alternatively, slurry hydroconversion can be used to process unconverted bottoms from a coking process.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: January 16, 2018
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Randolph J. Smiley, Anjaneya Sarma Kovvali, David G. Hammond, Grace Shi Qian Yeo
  • SLURRY HYDROCONVERSION AND COKING OF HEAVY OILS
    Publication number: 20150008157
    Abstract: Systems and methods are provided for use of coking and slurry hydroconversion for conversion of heavy oil feeds. The combination of coking and slurry hydroconversion allows for improved yield of liquid products while reducing or minimizing the consumption of hydrogen in slurry hydroconversion reaction stages. Coking and slurry hydroconversion can be combined by segregating feeds based on Conradson carbon residue. Alternatively, slurry hydroconversion can be used to process unconverted bottoms from a coking process.
    Type: Application
    Filed: June 19, 2014
    Publication date: January 8, 2015
    Applicant: ExxonMobil Research and Engineering Company
    Inventors: Randolph J. Smiley, Anjaneya Sarma KOVVALI, David G. HAMMOND, Grace Shi Qian YEO
  • SLURRY HYDROCONVERSION USING ENHANCED SLURRY CATALYSTS
    Publication number: 20140374314
    Abstract: Systems and methods are provided for slurry hydroconversion of a heavy oil feed, such as an atmospheric or vacuum resid. The systems and methods allow for slurry hydroconversion using catalysts with enhanced activity and/or catalysts that can be recycled as a side product from a complementary refinery process.
    Type: Application
    Filed: June 19, 2014
    Publication date: December 25, 2014
    Applicant: ExxonMobil Research and Engineering Company
    Inventors: Ramanathan SUNDARARAMAN, Thomas Francis DEGNAN, JR., Rustom Merwan BILLIMORIA, Natalie Ann FASSBENDER, Manuel A. FRANCISCO, Anjaneya Sarma KOVVALI, Randolph J. SMILEY, John Peter GREELEY, William Ernest LEWIS, Roby BEARDEN, JR.
  • Membrane separation of carbon dioxide
    Patent number: 6635103
    Abstract: A method for the separation of carbon dioxide from a gas mixture is described in which a dendrimer selective for carbon dioxide is present in an immobilized liquid membrane, the dendrimer being either in pure form or optionally with at least one solvent, such as but not limited to glycerol, polyethylene glycol, water, refrigerated methanol, NMP, or glycerol carbonate, the latter also having selective carbon dioxide properties as will be described below. In another embodiment, a dendrimer selective for carbon dioxide and capable of forming a film may be used in the method as the membrane itself, optionally with at least one solvent.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: October 21, 2003
    Assignee: New Jersey Institute of Technology
    Inventors: Kamalesh K. Sirkar, A. Sarma Kovvali, Hua Chen
  • Membrane separation of carbon dioxide
    Publication number: 20030033932
    Abstract: A method for the separation of carbon dioxide from a gas mixture is described in which a dendrimer selective for carbon dioxide is present in an immobilized liquid membrane, the dendrimer being either in pure form or optionally with at least one solvent, such as but not limited to glycerol, polyethylene glycol, water, refrigerated methanol, NMP, or glycerol carbonate, the latter also having selective carbon dioxide properties as will be described below. In another embodiment, a dendrimer selective for carbon dioxide and capable of forming a film may be used in the method as the membrane itself, optionally with at least one solvent.
    Type: Application
    Filed: July 19, 2002
    Publication date: February 20, 2003
    Inventors: Kamalesh K. Sirkar, A. Sarma Kovvali, Hua Chen