Patents by Inventor Mohammad Reza Mostofi Ashtiani

Mohammad Reza Mostofi Ashtiani 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).

  • Publication number: 20180320891
    Abstract: A method is disclosed for fluidizing a spent catalyst in a regenerator during a combustion process. The combustor includes a vessel and an air distributor. The air distributor includes an air grid and a plurality of first nozzles extending from the air grid. Spent catalyst is introduced into the vessel. Air is provided to the vessel via the plurality of first nozzles at a base combustion air rate. Additional air is provided to the vessels via a plurality of second nozzles of a fluffing air distributor at a fluffing air rate that is between 0.5 wt % and 10 wt % of the base combustion air rate to fluidize the catalyst. The second nozzles have outlets that are disposed below the air grid and above a bottom head of the vessel.
    Type: Application
    Filed: July 18, 2018
    Publication date: November 8, 2018
    Inventors: Dharmesh Chunilal Panchal, Mohammad Reza Mostofi-Ashtiani, Jagjit Singh Lall, Paolo Palmas, Michael S. Sandacz, Sathit Kulprathipanja
  • Patent number: 10016753
    Abstract: A baffle is installed on the wall of a regenerator vessel to push catalyst away from the wall to ensure adequate exposure to regeneration gas and complete combustion of coke from the catalyst. We have found that in deep beds, catalyst can flow down the walls and escape sufficient exposure to regeneration gas and undergo too little regeneration.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: July 10, 2018
    Assignee: UOP LLC
    Inventors: Richard A. Johnson, II, Paolo Palmas, Mohammad-Reza Mostofi-Ashtiani, Quan Yuan, James W. Althoff
  • Publication number: 20170080413
    Abstract: A baffle is installed on the wall of a regenerator vessel to push catalyst away from the wall to ensure adequate exposure to regeneration gas and complete combustion of coke from the catalyst. We have found that in deep beds, catalyst can flow down the walls and escape sufficient exposure to regeneration gas and undergo too little regeneration.
    Type: Application
    Filed: September 14, 2016
    Publication date: March 23, 2017
    Inventors: Richard A. Johnson, II, Paolo Palmas, Mohammad-Reza Mostofi-Ashtiani, Quan Yuan, James W. Althoff
  • Patent number: 9567268
    Abstract: A quench system and process for cooling high temperature gases is presented. The quench system includes a frustum, or conic, shaped section having an inlet at the smaller end of the quench section and the outlet at the larger end of the quench section. The system includes spray nozzles having openings flush with the wall of the quench section. The process includes spraying a large volume of liquid in small droplets for rapid heat transfer and vaporization of the quench liquid.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: February 14, 2017
    Assignee: UOP LLC
    Inventors: Peter Shafe, Aziz Sattar, Mohammad Reza Mostofi-Ashtiani, Laura E. Leonard, Rajeswar Gattupalli
  • Patent number: 9328038
    Abstract: A quench system and process for cooling high temperature gases is presented. The quench system includes a frustum, or conic, shaped section having an inlet at the smaller end of the quench section and the outlet at the larger end of the quench section. The system includes spray nozzles having openings flush with the wall of the quench section. The process includes spraying a large volume of liquid in small droplets for rapid heat transfer and vaporization of the quench liquid.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: May 3, 2016
    Assignee: UOP LLC
    Inventors: Peter Shafe, Aziz Sattar, Mohammad Reza Mostofi-Ashtiani, Laura E. Leonard, Rajeswar Gattupalli
  • Publication number: 20160067701
    Abstract: Catalyst regenerators and methods of their use are provided. A catalyst regenerator includes a combustion chamber with a combustion chamber diameter and a combustion chamber bottom. A mixing chamber is fluidly coupled to the combustion chamber at the combustion chamber bottom, where the mixing chamber has an exterior wall and a mixing chamber diameter less than the combustion chamber diameter. A first and second catalyst inlet are fluidly coupled to the mixing chamber, and a mixing cylinder is within the mixing chamber. The mixing cylinder and the exterior wall define an annular space there-between, and the mixing cylinder includes a cylinder opening.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 10, 2016
    Inventors: Lev Davydov, Mohammad Reza Mostofi-Ashtiani, Paolo Palmas
  • Patent number: 9266103
    Abstract: Catalyst regenerators and methods of their use are provided. A catalyst regenerator includes a combustion chamber with a combustion chamber diameter and a combustion chamber bottom. A mixing chamber is fluidly coupled to the combustion chamber at the combustion chamber bottom, where the mixing chamber has an exterior wall and a mixing chamber diameter less than the combustion chamber diameter. A first and second catalyst inlet are fluidly coupled to the mixing chamber, and a mixing cylinder is within the mixing chamber. The mixing cylinder and the exterior wall define an annular space there-between, and the mixing cylinder includes a cylinder opening.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: February 23, 2016
    Assignee: UOP LLC
    Inventors: Lev Davydov, Mohammad Reza Mostofi-Ashtiani, Paolo Palmas
  • Patent number: 9238209
    Abstract: An FCC process and apparatus may include injecting hydrocarbon feedstock at different radial positions while at the same elevation inside a riser. Multiple distributors may be used to position the tips for injecting feedstock at multiple radial positions. The distributors with tips more deeply positioned in the riser will penetrate a dense catalyst column we discovered generates in risers of larger diameter over 1.3 meters.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: January 19, 2016
    Assignee: UOP LLC
    Inventors: Keith A. Couch, Robert L. Mehlberg, Mohammad-Reza Mostofi-Ashtiani
  • Patent number: 9005431
    Abstract: A process and apparatus described is for distributing hydrocarbon feed to catalyst in a riser. Hydrocarbon feed is delivered to a plenum in the riser. Nozzles from the plenum inject feed into the riser to contact the catalyst. Streams of regenerated catalyst and carbonized catalyst may be passed to the riser and mixed around an insert in a lower section of a riser. The plenum may be located in the riser.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: April 14, 2015
    Assignee: UOP LLC
    Inventors: Roger L. Throndson, Paolo Palmas, Lev Davydov, Mohammad-Reza Mostofi-Ashtiani
  • Patent number: 8936758
    Abstract: A process and apparatus for mixing streams of regenerated and carbonized catalyst involves passing a catalyst stream around an insert in a lower section of a riser. The insert fosters mixing of the catalyst streams to reduce their temperature differential before contacting hydrocarbon feed.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: January 20, 2015
    Assignee: UOP LLC
    Inventors: Paolo Palmas, Mohammad-Reza Mostofi-Ashtiani, Lev Davydov
  • Publication number: 20150000323
    Abstract: A quench system and process for cooling high temperature gases is presented. The quench system includes a frustum, or conic, shaped section having an inlet at the smaller end of the quench section and the outlet at the larger end of the quench section. The system includes spray nozzles having openings flush with the wall of the quench section. The process includes spraying a large volume of liquid in small droplets for rapid heat transfer and vaporization of the quench liquid.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Inventors: Peter Shafe, Aziz Sattar, Mohammad Reza Mostofi-Ashtiani, Laura E. Leonard, Rajeswar Gattupalli
  • Publication number: 20150000313
    Abstract: A quench system and process for cooling high temperature gases is presented. The quench system includes a frustum, or conic, shaped section having an inlet at the smaller end of the quench section and the outlet at the larger end of the quench section. The system includes spray nozzles having openings flush with the wall of the quench section. The process includes spraying a large volume of liquid in small droplets for rapid heat transfer and vaporization of the quench liquid.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Inventors: Peter Shafe, Aziz Sattar, Mohammad Reza Mostofi-Ashtiani, Laura E. Leonard, Rajeswar Gattupalli
  • Patent number: 8911673
    Abstract: A process and apparatus described is for distributing hydrocarbon feed to catalyst in a riser. Hydrocarbon feed is delivered to a plenum in the riser. Nozzles from the plenum inject feed into the riser to contact the catalyst. Streams of regenerated catalyst and carbonized catalyst may be passed to the riser and mixed around an insert in a lower section of a riser. The plenum may be located in the riser.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: December 16, 2014
    Assignee: UOP LLC
    Inventors: Roger L. Throndson, Paolo Palmas, Lev Davydov, Mohammad-Reza Mostofi-Ashtiani
  • Patent number: 8815166
    Abstract: A process and apparatus for mixing streams of regenerated and carbonized catalyst involves passing a catalyst stream around an insert in a lower section of a riser. The insert fosters mixing of the catalyst streams to reduce their temperature differential before contacting hydrocarbon feed.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: August 26, 2014
    Assignee: UOP LLC
    Inventors: Paolo Palmas, Mohammad-Reza Mostofi-Ashtiani, Lev Davydov
  • Patent number: 8815082
    Abstract: A process and apparatus for mixing streams of regenerated and carbonized catalyst involves passing a catalyst stream into and out of a chamber in a lower section of a riser. The chamber fosters mixing of the catalyst streams to reduce their temperature differential before contacting hydrocarbon feed.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: August 26, 2014
    Assignee: UOP LLC
    Inventors: Lisa M. Wolschlag, Lev Davydov, Paolo Palmas, Robert L. Mehlberg, Mohammad-Reza Mostofi-Ashtiani, Daniel R. Johnson, Chad R. Huovie, Michael S. Sandacz, Peter J. Van Opdorp, Thomas W. Lorsbach, Karthikeyan Paramanandam
  • Patent number: 8747657
    Abstract: A process and apparatus for mixing streams of regenerated and carbonized catalyst involves passing a catalyst stream into and out of a chamber in a lower section of a riser. The chamber fosters mixing of the catalyst streams to reduce their temperature differential before contacting hydrocarbon feed.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: June 10, 2014
    Assignee: UOP LLC
    Inventors: Lev Davydov, Lisa M. Wolschlag, Paolo Palmas, Robert L. Mehlberg, Mohammad-Reza Mostofi-Ashtiani, Daniel R. Johnson, Chad R. Huovie, Michael S. Sandacz, Peter J. Van Opdorp, Thomas W. Lorsbach, Karthikeyan Paramanandam
  • Patent number: 8747758
    Abstract: A process and apparatus for mixing streams of regenerated and carbonized catalyst involves passing a catalyst stream into and out of a chamber in a lower section of a riser. The chamber fosters mixing of the catalyst streams to reduce their temperature differential before contacting hydrocarbon feed.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: June 10, 2014
    Assignee: UOP LLC
    Inventors: Lev Davydov, Lisa M. Wolschlag, Paolo Palmas, Robert L. Mehlberg, Mohammad-Reza Mostofi-Ashtiani, Daniel R. Johnson, Chad R. Huovie, Michael S. Sandacz, Peter J. Van Opdorp, Thomas W. Lorsbach, Karthikeyan Paramanandam
  • Patent number: 8747759
    Abstract: A process and apparatus for mixing streams of regenerated and carbonized catalyst involves passing a catalyst stream into and out of a chamber in a lower section of a riser. The chamber fosters mixing of the catalyst streams to reduce their temperature differential before contacting hydrocarbon feed.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: June 10, 2014
    Assignee: UOP LLC
    Inventors: Lisa M. Wolschlag, Lev Davydov, Paolo Palmas, Robert L. Mehlberg, Mohammad-Reza Mostofi-Ashtiani, Daniel R. Johnson, Chad R. Huovie, Michael S. Sandacz, Peter J. Van Opdorp, Thomas W. Lorsbach, Karthikeyan Paramanandam
  • Patent number: 8709235
    Abstract: Process for increasing mixing in a fluidized bed. A slide, which may be in the form of a tube or trough, transports particles from an upper zone downward to a lower zone at a different horizontal position, thereby changing the horizontal position of the particle and creating lateral mixing in the fluidized bed. Increased mixing may improve efficiency for an apparatus using a fluidized bed. For example, increased lateral mixing in a regenerator may increase temperature and oxygen mixing and reduce stagnation to improve efficiency. A slide may be relatively unobtrusive, inexpensive, and simple for a retrofit or design modification and may improve combustion efficiency at high rates by enhancing the lateral blending of spent and regenerated catalyst.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: April 29, 2014
    Assignee: UOP LLC
    Inventors: Brian W. Hedrick, Keith A. Couch, Robert L. Mehlberg, Mohammad-Reza Mostofi-Ashtiani
  • Publication number: 20140001096
    Abstract: A process and apparatus described is for distributing hydrocarbon feed to catalyst in a riser. Hydrocarbon feed is delivered to a plenum in the riser. Nozzles from the plenum inject feed into the riser to contact the catalyst. Streams of regenerated catalyst and carbonized catalyst may be passed to the riser and mixed around an insert in a lower section of a riser. The plenum may be located in the riser.
    Type: Application
    Filed: June 27, 2012
    Publication date: January 2, 2014
    Applicant: UOP LLC
    Inventors: Roger L. Throndson, Paolo Palmas, Lev Davydov, Mohammad-Reza Mostofi-Ashtiani