Patents by Inventor Diwakar Garg

Diwakar Garg 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: 9932530
    Abstract: A method for refining used motor oil using two or more hydrotreating reactors arranged in series. The used motor oil may be vacuum distilled to produce an unrefined gasoil. The unrefined gasoil may then be hydrotreated in a first hydrotreating reactor with hydrogen operated at a temperature ranging from approximately 245° C. to approximately 260° C. to produce a hydrotreated gasoil. The hydrogen may comprise a mixture of fresh hydrogen and recycled hydrogen recovered from the last of the two or more hydrotreating reactors. The hydrotreated gasoil may then be hydrotreated in one or more additional hydrotreating reactors operated at temperatures ranging from approximately 260° C. to approximately 330° C. to produce a refined gasoil. The first hydrotreating reactor may remove a substantial portion of metallic impurities from the unrefined impurities, while the one or more additional hydrotreating reactors remove a substantial portion of heteroatom impurities from the unrefined gasoil.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: April 3, 2018
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Diwakar Garg, Timothy D. Lebrecht
  • Publication number: 20150361356
    Abstract: A method for refining used motor oil using two or more hydrotreating reactors arranged in series. The used motor oil may be vacuum distilled to produce an unrefined gasoil. The unrefined gasoil may then be hydrotreated in a first hydrotreating reactor with hydrogen operated at a temperature ranging from approximately 245° C. to approximately 260° C. to produce a hydrotreated gasoil. The hydrogen may comprise a mixture of fresh hydrogen and recycled hydrogen recovered from the last of the two or more hydrotreating reactors. The hydrotreated gasoil may then be hydrotreated in one or more additional hydrotreating reactors operated at temperatures ranging from approximately 260° C. to approximately 330° C. to produce a refined gasoil. The first hydrotreating reactor may remove a substantial portion of metallic impurities from the unrefined impurities, while the one or more additional hydrotreating reactors remove a substantial portion of heteroatom impurities from the unrefined gasoil.
    Type: Application
    Filed: June 17, 2014
    Publication date: December 17, 2015
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Diwakar Garg, Timothy D. Lebrecht
  • Patent number: 8877673
    Abstract: A method of making a supported catalyst for reforming of steam and hydrocarbons and a steam-hydrocarbon reforming process using the supported catalyst. The supported catalyst is made from a mixture comprising 20 to 99.5 mass % of lanthanum-stabilized ?-alumina and/or lanthanum-stabilized ?-alumina, 0 to 60 mass % oalumina, 0 to 25 mass % of calcium carbonate and/or magnesium carbonate, and 0.5 to 5 mass % of graphite, a cellulose ether, and/or magnesium stearate. The supported catalyst has a porosity between 55% and 75% and a pore volume between 0.3 cc/g and 0.65 cc/g.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: November 4, 2014
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Diwakar Garg, Frederick Carl Wilhelm
  • Patent number: 8663596
    Abstract: Disclosed is a reactor, a structured packing, and a method for increasing the rate of decomposition of polysulfides and oxidation of polysulfides and hydrogen sulfide in liquid sulfur. The reactor, the structured packing, and the method involve a structured packing for contacting a first stream and a second stream in a reactor including a catalyst. The catalyst increases the rate of decomposition of polysulfides and oxidation of polysulfides and hydrogen sulfide in the liquid sulfur of the first stream with the second stream. The first stream includes liquid sulfur containing polysulfides and dissolved hydrogen sulfide. The second stream includes an oxygen-containing gas.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: March 4, 2014
    Assignee: Fluor Enterprises, Inc.
    Inventors: Diwakar Garg, Xianming Jimmy Li, Uday Navin Parekh, Jung Soo Choe, Elmo Nasato
  • Publication number: 20130225399
    Abstract: A method of making a supported catalyst for reforming of steam and hydrocarbons and a steam-hydrocarbon reforming process using the supported catalyst. The supported catalyst is made from a mixture comprising 20 to 99.5 mass % of lanthanum-stabilized ?-alumina and/or lanthanum-stabilized ?-alumina, 0 to 60 mass % oalumina, 0 to 25 mass % of calcium carbonate and/or magnesium carbonate, and 0.5 to 5 mass % of graphite, a cellulose ether, and/or magnesium stearate. The supported catalyst has a porosity between 55% and 75% and a pore volume between 0.3 cc/g and 0.65 cc/g.
    Type: Application
    Filed: November 8, 2011
    Publication date: August 29, 2013
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Diwakar Garg, Frederick Carl Wilhelm
  • Patent number: 8409521
    Abstract: A tubular reactor for producing a product mixture in a tubular reactor where the tubular reactor comprises an internal catalytic insert with cup-shaped structures having orifices for forming fluid jets for impinging the fluid on the tube wall. Jet impingement is used to improve heat transfer between the fluid in the tube and the tube wall in a non-adiabatic reactor. The tubular reactor and method may be used for endothermic reactions such as steam methane reforming and for exothermic reactions such as methanation.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: April 2, 2013
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Bo Jin, Robert Roger Broekhuis, Xiaoyi He, Shankar Nataraj, William Robert Licht, Diwakar Garg
  • Patent number: 8361432
    Abstract: Disclosed is a reactor, a retained catalyst structure, and a method for increasing the rate of decomposition of polysulfides and removal of hydrogen sulfide in liquid sulfur. The reactor, the retained catalyst structure, and the method include a retained catalyst structure arranged and disposed for contacting a first stream and a second stream in a reactor including a catalyst. The catalyst increases the rate of decomposition of polysulfides and facilitates the removal of hydrogen sulfide in the liquid sulfur of the first stream with the second stream. The first stream includes liquid sulfur containing polysulfides and dissolved hydrogen sulfide. The second stream includes an inert gas or a low oxygen-containing gas.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: January 29, 2013
    Assignee: Fluor Enterprises, Inc.
    Inventors: Uday Navin Parekh, Stephen Neal Fenderson, Diwakar Garg, Guglielmo Nasato
  • Patent number: 8303929
    Abstract: A process for producing a hydrogen-containing product gas by catalytic steam-hydrocarbon reforming with an overall steam-to-carbon molar ratio between 1.5 and 2.4 for the process. The process stream is reacted in at least two prereformers prior to reaction in catalyst-containing tubes in a top-fired reformer furnace. The process stream is reacted adiabatically in the first prereformer, while the process stream is heated prior to being introduced into the second prereformer and/or the second prereformer is heated. The process avoids carbon formation on the catalyst in the catalyst-containing tubes in the primary reformer.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: November 6, 2012
    Assignees: Air Products and Chemicals, Inc., Technip USA, Inc.
    Inventors: Xiang-Dong Peng, Diwakar Garg, William Robert Licht, Shankar Nataraj, Peter de Geest, Eric S. Wagner
  • Patent number: 8202446
    Abstract: A mixture and method for the storage and delivery of a gas are disclosed herein. In one aspect, there is provided a mixture comprising: an ionic liquid comprising an anion and a cation, at least a portion of the gas that is disposed within and reversibly chemically reacted with the ionic liquid, and optionally an unreacted gas. In another aspect, there is provided a method for delivering a gas from a mixture comprising an ionic liquid and one or more gases comprising: reacting at least a portion of the gas with the ionic liquid to provide the mixture comprising a chemically reacted gas and an ionic liquid and separating the chemically reacted gas from the mixture wherein the chemically reacted gas after the separating step has substantially the same chemical identity as the chemically reacted gas prior to the reacting step.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: June 19, 2012
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Daniel Joseph Tempel, Philip Bruce Henderson, Jeffrey Richard Brzozowski, Ronald Martin Pearlstein, Diwakar Garg
  • Publication number: 20120148479
    Abstract: Disclosed is a reactor, a retained catalyst structure, and a method for increasing the rate of decomposition of polysulfides and removal of hydrogen sulfide in liquid sulfur. The reactor, the retained catalyst structure, and the method include a retained catalyst structure arranged and disposed for contacting a first stream and a second stream in a reactor including a catalyst. The catalyst increases the rate of decomposition of polysulfides and facilitates the removal of hydrogen sulfide in the liquid sulfur of the first stream with the second stream. The first stream includes liquid sulfur containing polysulfides and dissolved hydrogen sulfide. The second stream includes an inert gas or a low oxygen-containing gas.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 14, 2012
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Uday Navin Parekh, Stephen Neal Fenderson, Diwakar Garg, Guglielmo Nasato
  • Patent number: 8197914
    Abstract: The present invention discloses plasma enhanced chemical vapor deposition (PECVD) process for depositing n-type and p-type zinc oxide-based transparent conducting oxides (TCOs) at low temperatures with excellent optical and electrical properties on glass and temperature sensitive materials such as plastics and polymers. Specifically, it discloses PECVD process for depositing n-type ZnO by doping it with B or F and p-type ZnO by doping it with nitrogen excellent optical and electrical properties on glass and temperature sensitive materials such as plastics and polymers for TCO application. The process utilizes a mixture of volatile zinc compound, argon and/or helium as a diluent gas, carbon dioxide as an oxidant, and a dopant or reactant to deposit the desired ZnO-based TCOs.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: June 12, 2012
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Diwakar Garg, Philip Bruce Henderson, Daniel Joseph Tempel, Thomas N. Jackson, Jie Sun
  • Patent number: 8178075
    Abstract: A tubular reactor and method for producing a product mixture in a tubular reactor where the tubular reactor comprises an internal catalytic insert having orifices for forming fluid jets for impinging the fluid on the tube wall. Jet impingement is used to improve heat transfer between the fluid in the tube and the tube wall in a non-adiabatic reactor. The tubular reactor and method may be used for endothermic reactions such as steam methane reforming and for exothermic reactions such as methanation.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: May 15, 2012
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Xiaoyi He, Robert Roger Broekhuis, Diwakar Garg, Bo Jin, William Robert Licht, Stephen Clyde Tentarelli
  • Patent number: 8038981
    Abstract: Complex metal oxide-containing pellets and their use for producing hydrogen. The complex metal oxide-containing pellets are suitable for use in a fixed bed reactor due to sufficient crush strength. The complex metal oxide-containing pellets comprise one or more complex metal oxides and at least one of in-situ formed calcium titanate and calcium aluminate. calcium titanate and calcium aluminate are formed by reaction of suitable precursors in a mixture with one or more complex metal carbonates. The complex metal oxide-containing pellets optionally comprise at least one precious metal.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: October 18, 2011
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Diwakar Garg, Robert Quinn, Frederick Carl Wilhelm, Gokhan Alptekin, Margarita Dubovik, Matthew Schaefer
  • Publication number: 20110194991
    Abstract: A tubular reactor for producing a product mixture in a tubular reactor where the tubular reactor comprises an internal catalytic insert with cup-shaped structures having orifices for forming fluid jets for impinging the fluid on the tube wall. Jet impingement is used to improve heat transfer between the fluid in the tube and the tube wall in a non-adiabatic reactor. The tubular reactor and method may be used for endothermic reactions such as steam methane reforming and for exothermic reactions such as methanation.
    Type: Application
    Filed: April 22, 2011
    Publication date: August 11, 2011
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Bo Jin, Robert Roger Broekhuis, Xiaoyi He, Shankar Nataraj, William Robert Licht, Diwakar Garg
  • Publication number: 20110182802
    Abstract: Disclosed is a reactor, a structured packing, and a method for increasing the rate of decomposition of polysulfides and oxidation of polysulfides and hydrogen sulfide in liquid sulfur. The reactor, the structured packing, and the method involve a structured packing for contacting a first stream and a second stream in a reactor including a catalyst. The catalyst increases the rate of decomposition of polysulfides and oxidation of polysulfides and hydrogen sulfide in the liquid sulfur of the first stream with the second stream. The first stream includes liquid sulfur containing polysulfides and dissolved hydrogen sulfide. The second stream includes an oxygen-containing gas.
    Type: Application
    Filed: January 25, 2010
    Publication date: July 28, 2011
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Diwakar Garg, Xianming Jimmy Li, Uday Navin Parekh, Jung Soo Choe, Elmo Nasato
  • Patent number: 7985449
    Abstract: A process is described for depositing a metal film on a substrate surface having a diffusion barrier layer deposited thereupon. In one embodiment of the present invention, the process includes: providing a surface of the diffusion barrier layer that is substantially free of an elemental metal and forming the metal film on at least a portion of the surface via deposition by using a organometallic precursor. In certain embodiments, the diffusion barrier layer may be exposed to an adhesion promoting agent prior to or during at least a portion of the forming step. Suitable adhesion promoting agents include nitrogen, nitrogen-containing compounds, carbon-containing compounds, carbon and nitrogen containing compounds, silicon-containing compounds, silicon and carbon containing compounds, silicon, carbon, and nitrogen containing compounds, or mixtures thereof. The process of the present invention provides substrates having enhanced adhesion between the diffusion barrier layer and the metal film.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: July 26, 2011
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Diwakar Garg, Hansong Cheng, John Anthony Thomas Norman, Eduardo Machado, Pablo Ordejon
  • Patent number: 7897128
    Abstract: The present invention provides a process for making a complex metal oxide comprising the formula AxByOz. The process comprises the steps of: (a) reacting in solution at a temperature of between about 75° C. to about 100° C. at least one water-soluble salt of A, at least one water-soluble salt of B and a stoichiometric amount of a carbonate salt or a bicarbonate salt required to form a mole of a carbonate precipitate represented by the formula AxBy(CO3)n, wherein the reacting is conducted in a substantial absence of carbon dioxide to form the carbonate precipitate and wherein the molar amount of carbonate salt or bicarbonate salt is at least three times the stoichiometric amount of carbonate or bicarbonate salt required to form a mole of the carbonate precipitate; and (b) reacting the carbonate precipitate with an oxygen containing fluid under conditions to form the complex metal oxide.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: March 1, 2011
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert Quinn, Diwakar Garg, Frederick Carl Wilhelm, Terry Lee Slager
  • Patent number: 7824655
    Abstract: In a process for producing a hydrogen-containing gas, a hydrocarbon feed gas and steam are introduced into a reaction vessel containing a complex metal oxide and steam-hydrocarbon reforming catalyst thereby forming a combustible gas mixture comprising hydrogen. A regeneration gas comprising greater than 0.1 volume % oxygen up to and including 2 volume % oxygen is introduced into the reaction vessel to displace at least a portion of the combustible gas mixture from the reaction vessel. Subsequently, additional regeneration gases may be introduced into the reaction vessel. Numerous means for providing various regeneration gases are presented.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: November 2, 2010
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Terry Lee Slager, Diwakar Garg, Xiang-Dong Peng, Bryan Clair Hoke, Jr.
  • Publication number: 20100264373
    Abstract: A process for producing a hydrogen-containing product gas by catalytic steam-hydrocarbon reforming with an overall steam-to-carbon molar ratio between 1.5 and 2.4 for the process. The process stream is reacted in at least two prereformers prior to reaction in catalyst-containing tubes in a top-fired reformer furnace. The process stream is reacted adiabatically in the first prereformer, while the process stream is heated prior to being introduced into the second prereformer and/or the second prereformer is heated. The process avoids carbon formation on the catalyst in the catalyst-containing tubes in the primary reformer.
    Type: Application
    Filed: April 15, 2010
    Publication date: October 21, 2010
    Applicants: AIR PRODUCTS AND CHEMICALS, INC., TECHNIP USA, INC.
    Inventors: William Robert LICHT, Shankar NATARAJ, Xiang-Dong PENG, Diwakar GARG, Peter de GEEST, Eric S. WAGNER
  • Publication number: 20100196259
    Abstract: CO2 sorptive pellets and/or granules and their use for removing CO2 from CO2-containing gases and for producing hydrogen. CO2 sorptive pellets are suitable for use in fixed bed reactors and the like due to sufficient crush strength. CO2 sorptive granules are suitable for moving, ebullated, expanded and fluidized beds. The CO2 sorptive pellets and/or granules comprise calcium oxide and/or magnesium oxide and at least one binding agent such as calcium titanate, calcium aluminate, calcium zirconate, magnesium titanate, magnesium aluminate, and magnesium zirconate. A method for making the CO2-sorptive pellets is described. The CO2 sorptive pellets optionally comprise at Ni, Pd, Pt, and/or Rh.
    Type: Application
    Filed: December 3, 2009
    Publication date: August 5, 2010
    Applicant: AIR PRODUCTS AND CHEMICALS, INC.
    Inventors: Diwakar Garg, Frederick Carl Wilhelm