Patents by Inventor Raymond Francis Drnevich

Raymond Francis Drnevich 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: 20210269379
    Abstract: Organic sulfur compounds contained in refinery off gas streams having either high or low concentrations of olefins are converted to hydrogen sulfides which can be then be removed using conventional amine treating systems. The process uses a catalytic reactor with or without a hydrotreater depending on the olefin concentration of the off gas stream. The catalytic reactor operates in a hydrogenation mode or an oxidation mode to convert a majority of organic sulfur compounds into hydrogen sulfides.
    Type: Application
    Filed: May 14, 2021
    Publication date: September 2, 2021
    Inventors: Minish Mahendra Shah, Raymond Francis Drnevich, Vasilis Papavassiliou
  • Patent number: 11034630
    Abstract: Organic sulfur compounds contained in refinery off gas streams having either high ort low concentrations of olefins are converted to hydrogen sulfides which can be then be removed using conventional amine treating systems. The process uses a catalytic reactor with or without a hydrotreater depending on the olefin concentration of the off gas stream. The catalytic reactor operates in a hydrogenation mode or an oxidation mode to convert a majority of organic sulfur compounds into hydrogen sulfides.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: June 15, 2021
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Minish Mahendra Shah, Raymond Francis Drnevich, Vasilis Papavassiliou
  • 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
  • Publication number: 20180319723
    Abstract: Organic sulfur compounds contained in refinery off gas streams having either high ort low concentrations of olefins are converted to hydrogen sulfides which can be then be removed using conventional amine treating systems. The process uses a catalytic reactor with or without a hydrotreater depending on the olefin concentration of the off gas stream. The catalytic reactor operates in a hydrogenation mode or an oxidation mode to convert a majority of organic sulfur compounds into hydrogen sulfides.
    Type: Application
    Filed: July 13, 2018
    Publication date: November 8, 2018
    Inventors: Minish Mahendra Shah, Raymond Francis Drnevich, Vasilis Papavassiliou
  • Patent number: 10017324
    Abstract: A method and system for storing and supplying hydrogen to a hydrogen pipeline in which a compressed hydrogen feed stream is introduced into a salt cavern for storage and a stored hydrogen stream is retrieved from the salt cavern and reintroduced into the hydrogen pipeline. A minimum quantity of stored hydrogen is maintained in the salt cavern to produce a stagnant layer having a carbon dioxide content along the cavern wall and the top of a residual brine layer located within the salt cavern. The compressed hydrogen feed stream is introduced into the salt cavern and the stored hydrogen stream is withdrawn without disturbing the stagnant layer to prevent carbon dioxide contamination from being drawn into the stored hydrogen stream being reintroduced into the hydrogen pipeline. This allows the stored hydrogen stream to be reintroduced into the hydrogen pipeline without carbon dioxide removal.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: July 10, 2018
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventor: Raymond Francis Drnevich
  • 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
  • Patent number: 9680350
    Abstract: The present invention provides a method and apparatus for separating air and generating electrical power. A compressed air stream produced in a main air compressor is introduced into an air separation unit that cryogenically rectifies the air into component products. During turndown conditions of the air separation unit, a combustion air stream formed from all or part of the compressed air stream is introduced into a combustor in which a fuel is combusted to produce a heated and pressurized combustion stream. Such stream is introduced to a turbine connected to an electrical generator to generate electrical power. The combustion air stream can be saturated with moisture to increase power output. Further, the combustion air stream can also be preheated with an exhaust of a gas turbine.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: June 13, 2017
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Gregory Joseph Panuccio, Raymond Francis Drnevich, Minish Mahendra Shah
  • Patent number: 9624440
    Abstract: In the production of fuel such as ethanol from carbonaceous feed material such as biomass, a stream comprising hydrogen and carbon monoxide is added to the raw gas stream derived from the feed material, and the resulting combined stream is converted into fuel and a gaseous byproduct such as by a Fischer-Tropsch reaction. The gaseous byproduct may be utilized in the formation of the aforementioned stream comprising hydrogen and carbon monoxide.
    Type: Grant
    Filed: October 23, 2013
    Date of Patent: April 18, 2017
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shrikar Chakravarti, Raymond Francis Drnevich, Dante Patrick Bonaquist, Gregory Panuccio
  • Patent number: 9611144
    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 and wherein the oxygen transport membrane based reforming system and associated synthesis production process equipment are substantially free of carbon formation and metal dusting corrosion.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: April 4, 2017
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shrikar Chakravarti, Raymond Francis Drnevich, Kenneth L. Burgers
  • Patent number: 9540293
    Abstract: Organic sulfur compounds contained in refinery off gas streams having either high ort low concentrations of olefins are converted to hydrogen sulfides which can be then be removed using conventional amine treating systems. The process uses a catalytic reactor with or without a hydrotreater depending on the olefin concentration of the off gas stream. The catalytic reactor operates in a hydrogenation mode or an oxidation mode to convert a majority of organic sulfur compounds into hydrogen sulfides.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: January 10, 2017
    Assignee: Praxair Technology, Inc.
    Inventors: Minish Mahendra Shah, Raymond Francis Drnevich, Vasilis Papavassiliou
  • Publication number: 20160361687
    Abstract: Organic sulfur compounds contained in refinery off gas streams having either high ort low concentrations of olefins are converted to hydrogen sulfides which can be then be removed using conventional amine treating systems. The process uses a catalytic reactor with or without a hydrotreater depending on the olefin concentration of the off gas stream. The catalytic reactor operates in a hydrogenation mode or an oxidation mode to convert a majority of organic sulfur compounds into hydrogen sulfides.
    Type: Application
    Filed: August 29, 2016
    Publication date: December 15, 2016
    Inventors: Minish Mahendra Shah, Raymond Francis Drnevich, Vasilis Papavassiliou
  • 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
  • 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
  • Publication number: 20160122128
    Abstract: A method and system for storing and supplying hydrogen to a hydrogen pipeline in which a compressed hydrogen feed stream is introduced into a salt cavern for storage and a stored hydrogen stream is retrieved from the salt cavern and reintroduced into the hydrogen pipeline. A minimum quantity of stored hydrogen is maintained in the salt cavern to produce a stagnant layer having a carbon dioxide content along the cavern wall and the top of a residual brine layer located within the salt cavern. The compressed hydrogen feed stream is introduced into the salt cavern and the stored hydrogen stream is withdrawn without disturbing the stagnant layer to prevent carbon dioxide contamination from being drawn into the stored hydrogen stream being reintroduced into the hydrogen pipeline. This allows the stored hydrogen stream to be reintroduced into the hydrogen pipeline without carbon dioxide removal.
    Type: Application
    Filed: January 12, 2016
    Publication date: May 5, 2016
    Inventor: Raymond Francis Drnevich
  • Patent number: 9296671
    Abstract: A method and system for producing methanol that employs an integrated oxygen transport membrane based reforming system is disclosed. The integrated oxygen transport membrane based reforming system carries out a primary reforming process, a secondary reforming process, and synthesis gas conditioning to produce synthesis gas having a desired module of between about 2.0 and 2.2 for a methanol production process thereby optimizing the efficiency and productivity of the methanol plant.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: March 29, 2016
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Ines C. Stuckert, Shrikar Chakravarti, Raymond Francis Drnevich
  • Patent number: 9278807
    Abstract: A method and system for storing and supplying hydrogen to a hydrogen pipeline in which a compressed hydrogen feed stream is introduced into a salt cavern for storage and a stored hydrogen stream is retrieved from the salt cavern and reintroduced into the hydrogen pipeline. A minimum quantity of stored hydrogen is maintained in the salt cavern to produce a stagnant layer having a carbon dioxide content along the cavern wall and the top of a residual brine layer located within the salt cavern. The compressed hydrogen feed stream is introduced into the salt cavern and the stored hydrogen stream is withdrawn without disturbing the stagnant layer to prevent carbon dioxide contamination from being drawn into the stored hydrogen stream being reintroduced into the hydrogen pipeline. This allows the stored hydrogen stream to be reintroduced into the hydrogen pipeline without carbon dioxide removal.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: March 8, 2016
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventor: Raymond Francis Drnevich
  • Patent number: 9115045
    Abstract: A method and system for producing methanol that employs both an oxygen transport membrane (OTM) based reforming system together with a more traditional steam methane reforming (SMR) and/or autothermal (ATR) synthesis gas production system is disclosed. The dual mode system and method for producing the synthesis gas in a methanol production process optimizes the efficiency and productivity of the methanol plant by using the OTM based reforming system as an independent source of synthesis gas. The disclosed methods and systems are configurable either as a retrofit to existing methanol production facilities or as an integrated package into newly constructed methanol production facilities.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: August 25, 2015
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Shrikar Chakravarti, Minish M. Shah, Raymond Francis Drnevich, Wladimir Y. Sarmiento-Darkin, Brian R. Kromer, Sean M. Kelly
  • Publication number: 20150190776
    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: Application
    Filed: March 18, 2015
    Publication date: July 9, 2015
    Inventors: Shrikar Chakravarti, Raymond Francis Drnevich, Minish M. Shah, Ines C. Stuckert
  • Patent number: 9023245
    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: November 13, 2013
    Date of Patent: May 5, 2015
    Assignee: Praxair Technology, Inc.
    Inventors: Shrikar Chakravarti, Raymond Francis Drnevich, Minish M. Shah, Ines C. Stuckert
  • Publication number: 20140319425
    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: November 26, 2013
    Publication date: October 30, 2014
    Inventors: Shrikar Chakravarti, Raymond Francis Drnevich, Kenneth L. Burgers, Minish M. Shah