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).
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Patent number: 11884616Abstract: Processes and apparatus for reforming hydrocarbons to reduce the impact of contaminants created by non-catalyst coking. The reaction zone receives sulfur to inhibit the impact, and a control index is used to control the determine conditions with generally lower pressures. Additionally, a compression zone, pressure control zone and combustion zone operation are provided for the operation of the reaction zone at the generally lower pressures.Type: GrantFiled: September 30, 2022Date of Patent: January 30, 2024Assignee: UOP LLCInventors: Bryan J. Egolf, Christopher D. DiGiulio, William Yanez, Ka L. Lok, Elie J. Fayad, Haibo Yu, Kristen E. Allaire, Falaah Falih, Jeffrey R. Grott, Sujay R. Krishnamurthy, Hari S. Bajpai, Phillip F. Daly, Matthew R. Zuraski, Hosoo Lim, Joseph Peterson, Michael R. Van de Cotte, Steven A. Bradley
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Publication number: 20230212095Abstract: Processes and apparatus for reforming hydrocarbons to reduce the impact of contaminants created by non-catalyst coking. The reaction zone receives sulfur to inhibit the impact, and a control index is used to control the determine conditions with generally lower pressures. Additionally, a compression zone, pressure control zone and combustion zone operation are provided for the operation of the reaction zone at the generally lower pressures.Type: ApplicationFiled: September 30, 2022Publication date: July 6, 2023Inventors: Bryan J. Egolf, Christopher D. DiGiulio, William Yanez, Ka L. Lok, Elie J. Fayad, Haibo Yu, Kristen E. Allaire, Falaah Falih, Jeffrey R. Grott, Sujay R. Krishnamurthy, Hari S. Bajpai, Phillip F. Daly, Matthew R. Zuraski, Hosoo Lim, Joseph Peterson, Michael R. Van de Cotte, Steven A. Bradley
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Patent number: 11042170Abstract: 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: GrantFiled: July 24, 2018Date of Patent: June 22, 2021Assignee: UOP LLCInventors: Sujay R. Krishnamurthy, Paolo Palmas, Thomas W. Lorsbach
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Patent number: 10688504Abstract: 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: GrantFiled: September 30, 2017Date of Patent: June 23, 2020Assignee: UOP LLCInventors: Sujay R. Krishnamurthy, Roger L. Throndson, James W. Althoff, Richard A. Johnson, II
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Publication number: 20200033893Abstract: 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: ApplicationFiled: July 24, 2018Publication date: January 30, 2020Inventors: Sujay R. Krishnamurthy, Paolo Palmas, Thomas W. Lorsbach
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Patent number: 10413891Abstract: 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: GrantFiled: July 24, 2018Date of Patent: September 17, 2019Assignee: UOP LLCInventors: Sujay R. Krishnamurthy, Paolo Palmas, Thomas W. Lorsbach
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Publication number: 20190099766Abstract: 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: ApplicationFiled: September 30, 2017Publication date: April 4, 2019Inventors: Sujay R. Krishnamurthy, Roger L. Throndson, James W. Althoff, Richard A. Johnson, II
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Patent number: 9643116Abstract: 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: GrantFiled: January 27, 2015Date of Patent: May 9, 2017Assignee: UOP LLCInventor: Sujay R. Krishnamurthy
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Patent number: 9370783Abstract: 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: GrantFiled: March 28, 2014Date of Patent: June 21, 2016Assignee: UOP LLCInventor: Sujay R. Krishnamurthy
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Publication number: 20150273375Abstract: 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: ApplicationFiled: January 27, 2015Publication date: October 1, 2015Inventor: Sujay R. Krishnamurthy
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Publication number: 20150273483Abstract: 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: ApplicationFiled: March 28, 2014Publication date: October 1, 2015Applicant: UOP LLCInventor: Sujay R. Krishnamurthy
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Patent number: 9127212Abstract: 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: GrantFiled: June 14, 2012Date of Patent: September 8, 2015Assignee: UOP LLCInventor: Sujay R. Krishnamurthy
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Patent number: 8945283Abstract: 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: GrantFiled: March 28, 2014Date of Patent: February 3, 2015Assignee: UOP LLCInventor: Sujay R. Krishnamurthy
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Patent number: 8894940Abstract: 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: GrantFiled: June 14, 2012Date of Patent: November 25, 2014Assignee: UOP LLCInventor: Sujay R. Krishnamurthy
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Publication number: 20130334101Abstract: 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: ApplicationFiled: June 14, 2012Publication date: December 19, 2013Applicant: UOP LLCInventor: Sujay R. Krishnamurthy
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Publication number: 20130336851Abstract: 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: ApplicationFiled: June 14, 2012Publication date: December 19, 2013Applicant: UOP LLCInventor: Sujay R. Krishnamurthy
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Patent number: 8173567Abstract: 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: GrantFiled: December 16, 2008Date of Patent: May 8, 2012Assignee: UOP LLCInventors: Paolo Palmas, Lawrence A. Lacijan, Sujay R. Krishnamurthy, Mohammad-Reza Mostofi-Ashtiani, Paul S. Nishimura, Lisa M. Wolschlag
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Patent number: 8071047Abstract: 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: GrantFiled: November 20, 2009Date of Patent: December 6, 2011Assignee: UOP LLCInventor: Sujay R. Krishnamurthy
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Publication number: 20110123412Abstract: 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: ApplicationFiled: November 20, 2009Publication date: May 26, 2011Applicant: UOP LLCInventor: Sujay R. Krishnamurthy
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Patent number: 7947230Abstract: 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: GrantFiled: December 16, 2008Date of Patent: May 24, 2011Assignee: UOP LLCInventors: Paolo Palmas, Lawrence A. Lacijan, Sujay R. Krishnamurthy, Mohammad-Reza Mostofi-Ashtiani, Paul S. Nishimura, Lisa M. Wolschlag