Patents by Inventor Sujay R. Krishnamurthy

Sujay R. Krishnamurthy 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: 11042170
    Abstract: A process and apparatus for reducing pressure of a flue gas stream including passing a pressurized flue gas stream to a vessel and through a bed of particulates in the vessel to reduce the pressure of the flue gas stream. The flue gas passes from the vessel at a lower pressure than at which it entered. The bed of particulates is disposed in the vessel between the outlet end of the inlet conduit and the inlet end of the outlet conduit. If deposits develop in the bed of particulates, the particulates can be replaced with fresh particulates to avoid excessive pressure drop. Data may be received from a stream in fluid communication with the foregoing process and apparatus.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: June 22, 2021
    Assignee: UOP LLC
    Inventors: Sujay R. Krishnamurthy, Paolo Palmas, Thomas W. Lorsbach
  • Patent number: 10688504
    Abstract: A process and apparatus of a gas-solids separator are provided in which a cap is disposed across an upstream end of swirl blades in a cyclonic separator to protect the blades from erosion by fast traveling solids.
    Type: Grant
    Filed: September 30, 2017
    Date of Patent: June 23, 2020
    Assignee: UOP LLC
    Inventors: Sujay R. Krishnamurthy, Roger L. Throndson, James W. Althoff, Richard A. Johnson, II
  • Publication number: 20200033893
    Abstract: A process and apparatus for reducing pressure of a flue gas stream comprising passing a pressurized flue gas stream to a vessel and through a bed of particulates in the vessel to reduce the pressure of the flue gas stream. The flue gas passes from the vessel at a lower pressure than at which it entered. The bed of particulates is disposed in the vessel between the outlet end of the inlet conduit and the inlet end of the outlet conduit. If deposits develop in the bed of particulates, the particulates can be replaced with fresh particulates to avoid excessive pressure drop. Data may be received from a stream in fluid communication with the foregoing process and apparatus.
    Type: Application
    Filed: July 24, 2018
    Publication date: January 30, 2020
    Inventors: Sujay R. Krishnamurthy, Paolo Palmas, Thomas W. Lorsbach
  • Patent number: 10413891
    Abstract: A process and apparatus for reducing pressure of a flue gas stream comprising passing a pressurized flue gas stream to a vessel and through a bed of particulates in the vessel to reduce the pressure of the flue gas stream. The flue gas passes from the vessel at a lower pressure than at which it entered. The bed of particulates is disposed in the vessel between the outlet end of the inlet conduit and the inlet end of the outlet conduit. If deposits develop in the bed of particulates, the particulates can be replaced with fresh particulates to avoid excessive pressure drop.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: September 17, 2019
    Assignee: UOP LLC
    Inventors: Sujay R. Krishnamurthy, Paolo Palmas, Thomas W. Lorsbach
  • Publication number: 20190099766
    Abstract: A process and apparatus of a gas-solids separator are provided in which a cap is disposed across an upstream end of swirl blades in a cyclonic separator to protect the blades from erosion by fast traveling solids.
    Type: Application
    Filed: September 30, 2017
    Publication date: April 4, 2019
    Inventors: Sujay R. Krishnamurthy, Roger L. Throndson, James W. Althoff, Richard A. Johnson, II
  • Patent number: 9643116
    Abstract: Cyclones for gas-solid separators are provided, which are especially applicable for use in a downflowing third stage separator (TSS) for the removal of dust particles, such as solid catalyst fines, from the flue gas streams exiting the catalyst regenerator in fluid catalytic cracking (FCC) processes. A cyclone comprises a barrel and a central hub disposed within the barrel to provide an annular section between the outer diameter of the central hub and the inner diameter of the barrel. Swirl vanes extend radially into the annular section. A shield is disposed at least partially within the annular section and at least partially within the swirl vanes. The shield radially divides the annular section into an inner annular portion and an outer annular portion.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: May 9, 2017
    Assignee: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Patent number: 9370783
    Abstract: Cyclones for gas-solid separators are provided, which are especially applicable for use in a downflowing third stage separator (TSS) for the removal of dust particles, such as solid catalyst fines, from the flue gas streams exiting the catalyst regenerator in fluid catalytic cracking (FCC) processes. A cyclone has a barrel having an interior, and a central hub disposed within the interior of the barrel. A plurality of concentric annular sections are disposed radially between the barrel and the central hub. Swirl vanes extend radially into at least one of the annular sections to define a swirl chamber within said at least one of the plurality of annular sections. At least one solid particle outlet is disposed at a lower end of the barrel. A gas outlet is in fluid communication with the interior of the barrel.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: June 21, 2016
    Assignee: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Publication number: 20150273483
    Abstract: Cyclones for gas-solid separators are provided, which are especially applicable for use in a downflowing third stage separator (TSS) for the removal of dust particles, such as solid catalyst fines, from the flue gas streams exiting the catalyst regenerator in fluid catalytic cracking (FCC) processes. A cyclone comprises a barrel having an interior, and a central hub disposed within the interior of the barrel. A plurality of concentric annular sections are disposed radially between the barrel and the central hub. Swirl vanes extend radially into at least one of the annular sections to define a swirl chamber within said at least one of the plurality of annular sections. At least one solid particle outlet is disposed at a lower end of the barrel. A gas outlet is in fluid communication with the interior of the barrel.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 1, 2015
    Applicant: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Publication number: 20150273375
    Abstract: Cyclones for gas-solid separators are provided, which are especially applicable for use in a downflowing third stage separator (TSS) for the removal of dust particles, such as solid catalyst fines, from the flue gas streams exiting the catalyst regenerator in fluid catalytic cracking (FCC) processes. A cyclone comprises a barrel and a central hub disposed within the barrel to provide an annular section between the outer diameter of the central hub and the inner diameter of the barrel. Swirl vanes extend radially into the annular section. A shield is disposed at least partially within the annular section and at least partially within the swirl vanes. The shield radially divides the annular section into an inner annular portion and an outer annular portion.
    Type: Application
    Filed: January 27, 2015
    Publication date: October 1, 2015
    Inventor: Sujay R. Krishnamurthy
  • Patent number: 9127212
    Abstract: A process and apparatus for fluid catalytic cracking feeds catalyst to a chamber of a riser. The catalyst exits the chamber and passes through a plenum and into a reaction zone through a plurality of tubes which distribute the catalyst uniformly over a cross section of the reaction zone of the riser. A hydrocarbon feed is fed to the plenum. The hydrocarbon feed passes from the plenum into the reaction zone through a plate comprising a multiplicity of openings which distribute the hydrocarbon feed uniformly over a cross section of the reaction zone of the riser. The feed is contacted with the catalyst in a reaction zone of the riser.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: September 8, 2015
    Assignee: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Patent number: 8945283
    Abstract: Cyclones for gas-solid separators are provided, which are especially applicable for use in a downflowing third stage separator (TSS) for the removal of dust particles, such as solid catalyst fines, from the flue gas streams exiting the catalyst regenerator in fluid catalytic cracking (FCC) processes. A cyclone comprises a barrel and a central hub disposed within the barrel to provide an annular section between the outer diameter of the central hub and the inner diameter of the barrel. Swirl vanes extend radially into the annular section. A shield is disposed at least partially within the annular section and at least partially within the swirl vanes. The shield radially divides the annular section into an inner annular portion and an outer annular portion.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: February 3, 2015
    Assignee: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Patent number: 8894940
    Abstract: A process and apparatus for fluid catalytic cracking feeds catalyst to a chamber of a riser. The catalyst exits the chamber and passes through a plenum and into a reaction zone through a plurality of tubes which distribute the catalyst uniformly over a cross section of the reaction zone of the riser. A hydrocarbon feed is fed to the plenum. The hydrocarbon feed passes from the plenum into the reaction zone through a plate comprising a multiplicity of openings which distribute the hydrocarbon feed uniformly over a cross section of the reaction zone of the riser. The feed is contacted with the catalyst in a reaction zone of the riser.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: November 25, 2014
    Assignee: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Publication number: 20130336851
    Abstract: A process and apparatus for fluid catalytic cracking feeds catalyst to a chamber of a riser. The catalyst exits the chamber and passes through a plenum and into a reaction zone through a plurality of tubes which distribute the catalyst uniformly over a cross section of the reaction zone of the riser. A hydrocarbon feed is fed to the plenum. The hydrocarbon feed passes from the plenum into the reaction zone through a plate comprising a multiplicity of openings which distribute the hydrocarbon feed uniformly over a cross section of the reaction zone of the riser. The feed is contacted with the catalyst in a reaction zone of the riser.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 19, 2013
    Applicant: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Publication number: 20130334101
    Abstract: A process and apparatus for fluid catalytic cracking feeds catalyst to a chamber of a riser. The catalyst exits the chamber and passes through a plenum and into a reaction zone through a plurality of tubes which distribute the catalyst uniformly over a cross section of the reaction zone of the riser. A hydrocarbon feed is fed to the plenum. The hydrocarbon feed passes from the plenum into the reaction zone through a plate comprising a multiplicity of openings which distribute the hydrocarbon feed uniformly over a cross section of the reaction zone of the riser. The feed is contacted with the catalyst in a reaction zone of the riser.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 19, 2013
    Applicant: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Patent number: 8173567
    Abstract: Disclosed is a catalyst distributor and process for spreading catalyst over a regenerator vessel. Nozzles disposed angular to a header of the distributor spread catalyst throughout a full cross section of the catalyst bed.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: May 8, 2012
    Assignee: UOP LLC
    Inventors: Paolo Palmas, Lawrence A. Lacijan, Sujay R. Krishnamurthy, Mohammad-Reza Mostofi-Ashtiani, Paul S. Nishimura, Lisa M. Wolschlag
  • Patent number: 8071047
    Abstract: A device is presented for use as a centerpipe in a radial flow reactor, or for a radial flow adsorption bed. The device includes a plurality of stacked slotted cylindrical sections and frustums. The design retains the particles in a solid particulate bed that can be flowing through the reactor. The frustums provide covers to the cylindrical sections to prevent the flow of solid particles back through the slots in the cylindrical sections.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: December 6, 2011
    Assignee: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Publication number: 20110123412
    Abstract: A device is presented for use as a centerpipe in a radial flow reactor, or for a radial flow adsorption bed. The device includes a plurality of stacked slotted cylindrical sections and frustums. The design retains the particles in a solid particulate bed that can be flowing through the reactor. The frustums provide covers to the cylindrical sections to prevent the flow of solid particles back through the slots in the cylindrical sections.
    Type: Application
    Filed: November 20, 2009
    Publication date: May 26, 2011
    Applicant: UOP LLC
    Inventor: Sujay R. Krishnamurthy
  • Patent number: 7947230
    Abstract: Disclosed is a catalyst distributor and process for spreading catalyst over a regenerator vessel. Nozzles disposed angular to a header of the distributor spread catalyst throughout a full cross section of the catalyst bed.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: May 24, 2011
    Assignee: UOP LLC
    Inventors: Paolo Palmas, Lawrence A. Lacijan, Sujay R. Krishnamurthy, Mohammad-Reza Mostofi-Ashtiani, Paul S. Nishimura, Lisa M. Wolschlag
  • Publication number: 20100152020
    Abstract: Disclosed is a catalyst distributor and process for spreading catalyst over a regenerator vessel. Nozzles disposed angular to a header of the distributor spread catalyst throughout a full cross section of the catalyst bed.
    Type: Application
    Filed: December 16, 2008
    Publication date: June 17, 2010
    Inventors: Paolo Palmas, Lawrence A. Lacijan, Sujay R. Krishnamurthy, Mohammad-Reza Mostofi-Ashtiani, Paul S. Nishimura, Lisa M. Wolschlag
  • Publication number: 20100150788
    Abstract: Disclosed is a catalyst distributor and process for spreading catalyst over a regenerator vessel. Nozzles disposed angular to a header of the distributor spread catalyst throughout a full cross section of the catalyst bed.
    Type: Application
    Filed: December 16, 2008
    Publication date: June 17, 2010
    Inventors: Paolo Palmas, Lawrence A. Lacijan, Sujay R. Krishnamurthy, Mohammad-Reza Mostofi-Ashtiani, Paul S. Nishimura, Lisa M. Wolschlag