Patents by Inventor Minish M. Shah

Minish M. Shah 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: 11485637
    Abstract: The present invention provides for a pressure swing adsorption (PSA) process for the substantial removal of H2O and CO2 from a synthesis gas to obtain a multicomponent product gas substantially free of H2O and CO2 with high recovery of the product gas. Further, the present invention provides an integrated process that achieves sufficiently high H2 and CO recoveries such that compression and recycling of the syngas purification PSA tailgas is not necessary to be economically advantageous compared to the conventional processes.
    Type: Grant
    Filed: October 21, 2020
    Date of Patent: November 1, 2022
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Luke J. Coleman, Kihyung Kim, Garrett R. Swindlehurst, Minish M. Shah
  • Publication number: 20220041442
    Abstract: The present invention provides for a pressure swing adsorption (PSA) process for the substantial removal of H2O and CO2 from a synthesis gas to obtain a multicomponent product gas substantially free of H2O and CO2 with high recovery of the product gas. Further, the present invention provides an integrated process that achieves sufficiently high H2 and CO recoveries such that compression and recycling of the syngas purification PSA tailgas is not necessary to be economically advantageous compared to the conventional processes.
    Type: Application
    Filed: October 21, 2020
    Publication date: February 10, 2022
    Inventors: Luke J. Coleman, Kihyung Kim, Garrett R. Swindlehurst, Minish M. Shah
  • Patent number: 11137204
    Abstract: The present invention relates to a cold box cycle which allows for independent control of the heat supplied for reboilers associated with the separation columns. More specifically, the invention relates to the tight control of the hydrogen removal separation, thus avoiding the possibility of excess reboiling in this separation. Optimal reboiling also results in a lower temperature of the hydrogen depleted liquid from this separation. As this stream is used to provide a portion of the cooling at the cold end of the primary heat exchanger, lower temperatures facilitate cooling of the incoming syngas feed, reducing carbon monoxide (CO) losses into the crude hydrogen stream from the high pressure separator. Lower CO in the crude hydrogen allows for smaller hydrogen purification equipment.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: October 5, 2021
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Minish M.. Shah, Bryan S. Kalp, Gary W. Fenner, Sameer Parvathikar
  • Publication number: 20200385641
    Abstract: The present invention relates to a method and system for treating a flow back fluid exiting a well site following stimulation of a subterranean formation. More specifically, the invention relates to processing the flow back fluid, and separating into a carbon dioxide rich stream and a carbon dioxide depleted stream, and continuing the separation until the carbon dioxide concentration in the flow back stream until the carbon dioxide concentration in the flow back gas diminishes to a point selected in a range of about 50-80 mol % in carbon dioxide concentration, after which the lower concentration carbon dioxide flow back stream continues to be separated into a carbon dioxide rich stream which is routed to waste or flare, and a hydrocarbon rich stream is formed.
    Type: Application
    Filed: August 24, 2020
    Publication date: December 10, 2020
    Inventors: Kenneth L. Burgers, Raymond F. Drnevich, Minish M. Shah, David R. Thompson
  • Patent number: 10787615
    Abstract: The present invention relates to a method and system for treating a flow back fluid exiting a well site following stimulation of a subterranean formation. More specifically, the invention relates to processing the flow back fluid, and separating into a carbon dioxide rich stream and a carbon dioxide depleted stream, and continuing the separation until the carbon dioxide concentration in the flow back stream until the carbon dioxide concentration in the flow back gas diminishes to a point selected in a range of about 50-80 mol % in carbon dioxide concentration, after which the lower concentration carbon dioxide flow back stream continues to be separated into a carbon dioxide rich stream which is routed to waste or flare, and a hydrocarbon rich stream is formed.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: September 29, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Kenneth L. Burgers, Raymond F. Drnevich, Minish M. Shah, David R. Thompson
  • Publication number: 20190248650
    Abstract: A method and system for producing a synthesis gas in an oxygen transport membrane based reforming system that utilizes a combined feed stream having a steam to carbon ratio between about 1.6 and 3.0 and a temperature between about 500° C. and 750° C. The combined feed stream is comprised a pre-reformed hydrocarbon feed, superheated steam, and a reaction product stream created by the reaction of a hydrogen containing stream reacted with the permeated oxygen at the permeate side of the oxygen transport membrane elements.
    Type: Application
    Filed: February 19, 2019
    Publication date: August 15, 2019
    Inventors: Shrikar Chakravarti, Raymond Francis Drnevich, Kenneth L. Burgers, Minish M. Shah
  • Patent number: 10005664
    Abstract: A method and system for producing a synthesis gas in an oxygen transport membrane based reforming system is disclosed that carries out a primary reforming process within a reforming reactor, and a secondary reforming process within an oxygen transport membrane reactor and in the presence of heat generated from a oxygen transport membrane reactor and an auxiliary source of heat. The auxiliary source of heat is disposed within the reactor housing proximate the reforming reactors and may include an auxiliary reactively driven oxygen transport membrane reactor or a ceramic burner.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: June 26, 2018
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shrikar Chakravarti, Raymond F. Drnevich, Ines C. Stuckert, Minish M. Shah
  • Patent number: 9938145
    Abstract: A method and system for producing a synthesis gas in an oxygen transport membrane based reforming system is disclosed that carries out an air heated pre-reforming process, a primary reforming process, a secondary reforming process.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: April 10, 2018
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shrikar Chakravarti, Raymond Francis Drnevich, Minish M. Shah, Ines C. Stuckert
  • Publication number: 20180058757
    Abstract: The present invention relates to a cold box cycle which allows for independent control of the heat supplied for reboilers associated with the separation columns. More specifically, the invention relates to the tight control of the hydrogen removal separation, thus avoiding the possibility of excess reboiling in this separation. Optimal reboiling also results in a lower temperature of the hydrogen depleted liquid from this separation. As this stream is used to provide a portion of the cooling at the cold end of the primary heat exchanger, lower temperatures facilitate cooling of the incoming syngas feed, reducing carbon monoxide (CO) losses into the crude hydrogen stream from the high pressure separator. Lower CO in the crude hydrogen allows for smaller hydrogen purification equipment.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 1, 2018
    Inventors: Minish M. Shah, Bryan S. Kalp, Gary W. Fenner, Sameer Parvathikar
  • Patent number: 9676628
    Abstract: The present invention relates a process and apparatus that recovers a helium rich stream from a mixed gas having low concentrations of helium therein. More specifically, the invention relates to an integrated process and apparatus for treating a mixed feed gas from an operating process that produces a liquid product from natural gas containing helium, such as processes that produce ammonia, methanol, or liquid hydrocarbons.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: June 13, 2017
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Minish M. Shah, Joseph M. Schwartz, Khushnuma Koita, Michael J. Dray
  • Patent number: 9623370
    Abstract: The present invention relates a process and apparatus that recovers a helium rich stream from a mixed gas having low concentrations of helium therein. More specifically, the invention relates to an integrated process and apparatus for treating a mixed feed gas from an operating process that produces a fluid product from natural gas containing helium, such as processes that produce ammonia, methanol, or liquid hydrocarbons.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: April 18, 2017
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Joseph M. Schwartz, Khushnuma Koita, Minish M. Shah
  • Patent number: 9556027
    Abstract: A method and system for producing hydrogen using an oxygen transport membrane based reforming system is disclosed that carries out a primary reforming process within a reforming reactor, and a secondary reforming process within a reactively driven and catalyst containing oxygen transport membrane reactor with or without an auxiliary source of heat to support primary reforming process within the reforming reactor to first form a synthesis gas product. The auxiliary source of heat is disposed within the oxygen transport membrane based reforming system proximate to the reforming reactors and comprises an auxiliary oxygen transport membrane reactor or a ceramic burner. The synthesis gas product is further treated in a separate high temperature water gas shift reactor and optionally in a separate low temperature water gas shift reactor. Hydrogen is produced from the resulting hydrogen-enriched gas using hydrogen PSA.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: January 31, 2017
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shrikar Chakravarti, Raymond F. Drnevich, Ines C. Stuckert, Minish M. Shah
  • Publication number: 20160272493
    Abstract: A method and system for producing a synthesis gas in an oxygen transport membrane based reforming system is disclosed that carries out an air heated pre-reforming process, a primary reforming process, a secondary reforming process.
    Type: Application
    Filed: May 27, 2016
    Publication date: September 22, 2016
    Inventors: Shrikar Chakravarti, Raymond Francis Drnevich, Minish M. Shah, Ines C. Stuckert
  • Publication number: 20160231051
    Abstract: The present invention relates a process and apparatus that recovers a helium rich stream from a mixed gas having low concentrations of helium therein. More specifically, the invention relates to an integrated process and apparatus for treating a mixed feed gas from an operating process that produces a liquid product from natural gas containing helium, such as processes that produce ammonia, methanol, or liquid hydrocarbons.
    Type: Application
    Filed: February 10, 2015
    Publication date: August 11, 2016
    Inventors: MINISH M. SHAH, JOSEPH M. SCHWARTZ, KHUSHNUMA KOITA, MICHAEL J. DRAY
  • Publication number: 20160228813
    Abstract: The present invention relates a process and apparatus that recovers a helium rich stream from a mixed gas having low concentrations of helium therein. More specifically, the invention relates to an integrated process and apparatus for treating a mixed feed gas from an operating process that produces a fluid product from natural gas containing helium, such as processes that produce ammonia, methanol, or liquid hydrocarbons.
    Type: Application
    Filed: February 10, 2015
    Publication date: August 11, 2016
    Inventors: JOSEPH M. SCHWARTZ, KHUSHNUMA KOITA, MINISH M. SHAH
  • Patent number: 9352296
    Abstract: A method and system for producing a synthesis gas in an oxygen transport membrane based reforming system is disclosed that carries out a primary reforming process, a secondary reforming process.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: May 31, 2016
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shrikar Chakravarti, Raymond Francis Drnevich, Minish M. Shah, Ines C. Stuckert
  • Patent number: 9290422
    Abstract: A hybrid plant and method for producing liquid fuel product from hydrogen and carbon monoxide containing streams produced by gasifying solid carbonaceous feedstock and steam reforming of light fossil fuels. When a gasification unit in the hybrid plant is operating at reduced capacity or is not operational, oxygen that would have been used in the gasification unit is diverted to a light fossil fuel conversion unit containing an autothermal reformer to increase H2-rich syngas flow to a liquid fuel production unit and maintain liquid fuel production at near nameplate capacity.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: March 22, 2016
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Raymond F. Drnevich, Shrikar Chakravarti, Minish M. Shah
  • Publication number: 20160060109
    Abstract: A method and system for producing a synthesis gas in an oxygen transport membrane based reforming system is disclosed that carries out a primary reforming process within a reforming reactor, and a secondary reforming process within an oxygen transport membrane reactor and in the presence of heat generated from a oxygen transport membrane reactor and an auxiliary source of heat. The auxiliary source of heat is disposed within the reactor housing proximate the reforming reactors and may include an auxiliary reactively driven oxygen transport membrane reactor or a ceramic burner.
    Type: Application
    Filed: November 9, 2015
    Publication date: March 3, 2016
    Inventors: Shrikar Chakravarti, Raymond F. Drnevich, Ines C. Stuckert, Minish M. Shah
  • Patent number: 9212113
    Abstract: A method and system for producing a synthesis gas in an oxygen transport membrane based reforming system is disclosed that carries out a primary reforming process within a reforming reactor, and a secondary reforming process within an oxygen transport membrane reactor and in the presence of heat generated from a oxygen transport membrane reactor and an auxiliary source of heat. The auxiliary source of heat is disposed within the reactor housing proximate the reforming reactors and may include an auxiliary reactively driven oxygen transport membrane reactor or a ceramic burner.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: December 15, 2015
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shrikar Chakravarti, Raymond F. Drnevich, Ines C. Stuckert, Minish M. Shah
  • Patent number: 9145525
    Abstract: A process and method for producing liquid fuel product from hydrogen and carbon monoxide containing streams produced by gasifying solid carbonaceous feedstock and steam reforming of light fossil fuels. The gasifier syngas is treated to preferentially remove at least 99% of sulfur containing impurities and less than 50% of the CO2 to produce a treated gasifier syngas and a CO2 enriched gas. The treated gasifier syngas and the light fossil fuel conversion unit product gas are combined to form a mixed syngas that is converted into a liquid fuel product. The CO2 enriched gas is used in the gasification unit.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: September 29, 2015
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shrikar Chakravarti, Raymond F. Drnevich, Minish M Shah