Patents by Inventor Krishnan Sankaranarayanan
Krishnan Sankaranarayanan 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: 11827857Abstract: Systems and methods for producing olefins and/or aromatics are disclosed. Methods disclosed includes thermal hydro-processing of crude oils and/or heavy oils and/or residues, in a thermal hydro-processing unit, to produce intermediate products, which can then be used to make valuable chemicals such as olefins and aromatics.Type: GrantFiled: January 27, 2020Date of Patent: November 28, 2023Assignee: SABIC GLOBAL TECHNOLOGIES B.V.Inventors: Ravichander Narayanaswamy, Hatem Belfadhel, Girish Koripelly, Alexander Stanislaus, Krishna Kumar Ramamurthy, Krishnan Sankaranarayanan
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Patent number: 11680028Abstract: Systems and methods for producing olefins and/or aromatics are disclosed. Methods disclosed includes aqua-processing hydro-processing of crude oils and/or heavy oils and/or residue, in an aqua-processing hydro-processing unit, to produce intermediate products, which can then be used to make valuable chemicals such as olefins and aromatics.Type: GrantFiled: January 16, 2020Date of Patent: June 20, 2023Assignee: SABIC GLOBAL TECHNOLOGIES B.V.Inventors: Ravichander Narayanaswamy, Hatem Belfadhel, Girish Koripelly, Alexander Stanislaus, Krishna Kumar Ramamurthy, Krishnan Sankaranarayanan
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Publication number: 20220106532Abstract: Systems and methods for producing olefins and/or aromatics are disclosed. Methods disclosed includes thermal hydro-processing of crude oils and/or heavy oils and/or residues, in a thermal hydro-processing unit, to produce intermediate products, which can then be used to make valuable chemicals such as olefins and aromatics.Type: ApplicationFiled: January 27, 2020Publication date: April 7, 2022Applicant: SABIC Global Technologies B.V.Inventors: Ravichander NARAYANASWAMY, Hatem BELFADHEL, Girish KORIPELLY, Alexander STANISLAUS, Krishna Kumar RAMAMURTHY, Krishnan SANKARANARAYANAN
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Publication number: 20220064084Abstract: Systems and methods for producing olefins and/or aromatics are disclosed. Methods disclosed includes aqua-processing hydro-processing of crude oils and/or heavy oils and/or residue, in an aqua-processing hydro-processing unit, to produce intermediate products, which can then be used to make valuable chemicals such as olefins and aromatics.Type: ApplicationFiled: January 16, 2020Publication date: March 3, 2022Inventors: Ravichander NARAYANASWAMY, Hatem BELFADHEL, Girish KORIPELLY, Alexander STANISLAUS, Krishna Kumar RAMAMURTHY, Krishnan SANKARANARAYANAN
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Publication number: 20210308650Abstract: A reactor (12, 128, 198) and method for the conversion of hydrocarbon gases utilizes a reactor (12, 128, 198) having a unique feed assembly (58, 136, 200) with an original vortex disk-like inlet flow spaces (72, 74, 76, 80, 146, 148, 150, 152, 208, 216, 218), a converging-diverging vortex mixing chamber (116), and a cylindrical reactor chamber (40). This design creates a small combustion zone and an inwardly swirling fluid flow pattern of the feed gases that passes through a converging conduit (48) with a constricted neck portion (54). This provides conditions suitable for efficient cracking of hydrocarbons, such as ethane, to form olefins.Type: ApplicationFiled: October 23, 2019Publication date: October 7, 2021Inventors: Sreekanth Pannala, Byeongjin Baek, Lei Chen, Vladimir Shtern, Istvan Lengyel, David West, Krishnan Sankaranarayanan
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Patent number: 11123705Abstract: A reactor (12, 128, 198) and method for the conversion of hydrocarbon gases utilizes a reactor (12, 128, 198) having a unique feed assembly (58, 136, 200) with an original vortex disk-like inlet flow spaces (72, 74, 76, 80, 146, 148, 150, 152, 208, 216, 218), a converging-diverging vortex mixing chamber (116), and a cylindrical reactor chamber (40). This design creates a small combustion zone and an inwardly swirling fluid flow pattern of the feed gases that passes through a converging conduit (48) with a constricted neck portion (54). This provides conditions suitable for efficient cracking of hydrocarbons, such as ethane, to form olefins.Type: GrantFiled: October 23, 2019Date of Patent: September 21, 2021Assignee: SABIC Global Technologies B.V.Inventors: Sreekanth Pannala, Byeongjin Baek, Lei Chen, Vladimir Shtern, Istvan Lengyel, David West, Krishnan Sankaranarayanan
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Publication number: 20200048164Abstract: A method of selecting a stable mixed metal oxide catalyst for an oxidative coupling of methane (OCM) reaction is disclosed. The method may include, obtaining a mixed metal oxide material having catalytically active metal oxides for the OCM reaction and identifying the Tammann temperature (TTam) of at least one of the catalytically active metals oxides of the mixed metal oxide material. The method further includes selecting the mixed metal oxide material for use as a catalyst in the OCM reaction if the at least one catalytically active metal oxides present in the mixed metal oxide material has a TTam greater than a predetermined temperature.Type: ApplicationFiled: October 17, 2017Publication date: February 13, 2020Inventors: Sagar Sarsani, Wugeng Liang, Dick Nagaki, Krishnan Sankaranarayanan, David West, Aghaddin Mamedov
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Publication number: 20190233350Abstract: Integrated processes for the conversion of hydrocarbons to C2 and C3 unsaturated hydrocarbons include combustion and cracking of hydrocarbons, dry oxidative reforming of methane, and catalytic hydrogenation of acetylene. Reactive products formed among the integrated processes may be distributed and recycled among the processes for the conversion of the hydrocarbon feedstock.Type: ApplicationFiled: September 12, 2017Publication date: August 1, 2019Inventors: Krishnan SANKARANARAYANAN, Pankaj Singh GAUTAM, Aghaddin Khanlar MAMEDOV, Sreekanth PANNALA, Balamurali Krishna RAMACHANDRAN NAIR, Istvan LENGYEL, David WEST
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Publication number: 20190127295Abstract: Disclosed herein are processes, apparatuses, and systems for producing chemicals. One system may comprise a wall defining a chamber; a plurality of burners configured in an arrangement within the chamber, wherein each of the burners is supplied with a material and facilitates combustion of the material, and wherein the arrangement defines an inner volume disposed radially inwardly relative thereto; and an injector disposed within the inner volume and configured to introduce a feedstock into the chamber, wherein the plurality of burners provide thermal energy to facilitate thermal pyrolysis of the feedstock.Type: ApplicationFiled: May 9, 2017Publication date: May 2, 2019Inventors: Sreekanth Pannala, Balamurali Krishna Ramachandran Nair, Pankaj Singh Gautam, Krishnan Sankaranarayanan, David West, Istvan Lengyel, Chunliang Wu
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Patent number: 9902665Abstract: A method for producing C2+ hydrocarbons and H2 comprising (a) introducing to a reactor a reactant mixture comprising methane, (b) heating the reactant mixture to a preheating temperature to yield a heated mixture, (c) generating free radicals in the heated mixture to form a primary effluent mixture comprising free radicals, C2+ hydrocarbons, H2, and unreacted methane, (d) reacting the primary effluent mixture in a secondary reaction zone to form a secondary effluent mixture comprising C2+ hydrocarbons, H2, free radicals, and unreacted methane, at a secondary reaction zone temperature that is greater than the preheating temperature, wherein a free radicals amount in the primary effluent mixture is greater than a free radicals amount in the secondary effluent mixture, (e) cooling the secondary effluent mixture to a quench temperature lower than the secondary reaction zone temperature to yield a product mixture comprising C2+ hydrocarbons and H2, and (f) recovering the product mixture.Type: GrantFiled: June 10, 2016Date of Patent: February 27, 2018Assignee: Sabic Global Technologies, B.V.Inventors: Dick A. Nagaki, Zhun Zhao, Myat Noe Zin Myint, Istvan Lengyel, Aghaddin Mamedov, C. William Gundlach, IV, Krishnan Sankaranarayanan, Derek Falcone
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Publication number: 20160362351Abstract: A method for producing C2+ hydrocarbons and H2 comprising (a) introducing to a reactor a reactant mixture comprising methane, (b) heating the reactant mixture to a preheating temperature to yield a heated mixture, (c) generating free radicals in the heated mixture to form a primary effluent mixture comprising free radicals, C2+ hydrocarbons, H2, and unreacted methane, (d) reacting the primary effluent mixture in a secondary reaction zone to form a secondary effluent mixture comprising C2+ hydrocarbons, H2, free radicals, and unreacted methane, at a secondary reaction zone temperature that is greater than the preheating temperature, wherein a free radicals amount in the primary effluent mixture is greater than a free radicals amount in the secondary effluent mixture, (e) cooling the secondary effluent mixture to a quench temperature lower than the secondary reaction zone temperature to yield a product mixture comprising C2+ hydrocarbons and H2, and (f) recovering the product mixture.Type: ApplicationFiled: June 10, 2016Publication date: December 15, 2016Inventors: Dick A. NAGAKI, Zhun ZHAO, Myat Noe Zin MYINT, Istvan LENGYEL, Aghaddin MAMEDOV, C. William GUNDLACH, IV, Krishnan SANKARANARAYANAN, Derek FALCONE
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Patent number: 8829252Abstract: The invention concerns a system and process for alcohol production.Type: GrantFiled: June 20, 2011Date of Patent: September 9, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Dennis Jay Davoren, Seth McConkie Washburn, James Oliver Meredith, Krishnan Sankaranarayanan, Bryan Amrutlal Patel, Milind Bholanath Ajinkya
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Publication number: 20130211153Abstract: The invention concerns a system and process for alcohol production.Type: ApplicationFiled: June 20, 2011Publication date: August 15, 2013Applicant: Exxonmobile Chemical Patents Inc.Inventors: Dennis Jay Davoren, Seth McConkie Washburn, James Oliver Meredith, Krishnan Sankaranarayanan, Bryan Amrutlal Patel, Milind Bholanath Ajinkya
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Patent number: 8076524Abstract: The present invention relates to a method for preparing olefin comonomers from ethylene. The comonomer generated can be used in a subsequent process, such as a polyethylene polymerization reactor. The comonomer generated can be transported, optionally without isolation or storage, to a polyethylene polymerization reactor. One method includes the steps of: feeding ethylene and a catalyst in a solvent/diluent to one or more comonomer synthesis reactors; reacting the ethylene and the catalyst under reaction conditions sufficient to produce an effluent comprising a desired comonomer; forming a gas stream comprising unreacted ethylene, and a liquid/bottoms stream comprising the comonomer, optionally by passing the effluent to one or more downstream gas/liquid phase separators; and purifying at least a portion of said liquid/bottoms stream by removing at least one of solid polymer, catalyst, and undesirable olefins therefrom.Type: GrantFiled: January 17, 2007Date of Patent: December 13, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: James R. Lattner, John F. Walzer, Jr., Krishnan Sankaranarayanan, John Scott Buchanan, Milind Bholanath Ajinkya, Stephen M Wood, Anastasios I Skoulidas, Jay L Reimers, Timothy Daniel Shaffer
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Publication number: 20110217218Abstract: A method and system for the selective removal of CO2 and/or H2S from a gaseous stream containing one or more acid gases. In particular, a system and method for separating CO2 and/or H2S from a gas mixture containing an acid gas using an absorbent solution and one or more ejector venturi nozzles in flow communication with one or more absorbent contactors. The method involves contacting a gas mixture containing at least one acid gas with the absorbent solution under conditions sufficient to cause absorption of at least a portion of said acid gas. The absorbent contactors operate in co-current flow and are arranged in a counter-current configuration to increase the driving force for mass transfer. Monoliths can be used that operate in a Taylor flow or slug flow regime. The absorbent solution is treated under conditions sufficient to cause desorption of at least a portion of the acid gas.Type: ApplicationFiled: February 18, 2011Publication date: September 8, 2011Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Ramesh Gupta, Krishnan Sankaranarayanan, Himanshu Gupta, Benjamin A. McCool, Robert B. Fedich, Richard D. Lenz
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Patent number: 8003839Abstract: The present invention relates to an in-line method for generating comonomer, from monomer, such as ethylene. The comonomer generated is stored prior to transporting to a polyethylene polymerization reactor. The in-line method includes the steps of providing an in-line comonomer synthesis reactor and a downstream gas/liquid phase separator prior to the polymerization reactor; feeding ethylene monomer and a catalyst in a solvent and/or diluent to the comonomer synthesis reactor; reacting the ethylene monomer and the catalyst in solvent and/or diluent under reaction conditions to produce an effluent stream including ethylene monomer and comonomer; passing the effluent stream from the comonomer synthesis reactor to the downstream gas/liquid phase separator to separate a gas stream from a bottom stream, wherein the gas stream is a mixture of ethylene monomer and comonomer; and passing the gas stream to the polymerization reactor to provide the necessary comonomer input.Type: GrantFiled: September 8, 2006Date of Patent: August 23, 2011Assignee: Exxonmobil Chemical Patents Inc.Inventors: John Scott Buchanan, Krishnan Sankaranarayanan, Milind B. Ajinkya, Stephen M. Wood, Anastasios I. Skoulidas, James R. Lattner, John F. Walzer
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Patent number: 7875254Abstract: The invention relates to improvements in internal loop reactors. The reactor of the invention is characterized by a plurality of cooling tubes which form the annulus between the riser and the downcomer path of said internal loop reactor. The reactor also provides improvements in hydroformylation reactions using the improved reactor.Type: GrantFiled: January 5, 2010Date of Patent: January 25, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ronald Dean Garton, Matthew Findlay, Krishnan Sankaranarayanan, Arie Van Vliet
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Patent number: 7858833Abstract: The present invention relates to a method for preparing linear alpha olefin comonomers, such as 1-butene, 1-hexene or 1-octene, from ethylene monomer. The comonomer generated is stored on site for use in a subsequent process, such as a polyethylene polymerization reactor. The method includes the steps of feeding an ethylene monomer, and a catalyst in a solvent to one or more comonomer synthesis reactors; reacting the ethylene monomer and the catalyst in solvent under reaction conditions to produce an effluent stream comprising unreacted ethylene monomer, a catalyst in a solvent, and comonomer; passing the effluent stream to one or more downstream gas/liquid phase separators to form a gas stream of unreacted ethylene monomer, and a liquid stream of comonomer, and catalyst in a solvent; recycling to the one or more comonomer synthesis reactors the unreacted ethylene monomer and a portion of the liquid stream; and storing a remaining portion of said liquid stream for subsequent processing of the comonomer.Type: GrantFiled: February 3, 2006Date of Patent: December 28, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: John S. Buchanan, Krishnan Sankaranarayanan, Milind B. Ajinkya, Stephen M. Wood, Anastasios Skoulidas
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Publication number: 20100282567Abstract: A fuel desulfurization system that can be located on-board a transportation vehicle. The desulfurization system contains a unique sorption vessel having a vacuum shell design to ensure a prescribed axial and radial temperature profile under operating conditions.Type: ApplicationFiled: April 13, 2010Publication date: November 11, 2010Inventors: Krishnan Sankaranarayanan, Himanshu Gupta
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Patent number: 7815873Abstract: The overall efficiency of a regenerative bed reverse flow reactor system is increased where the location of the exothermic reaction used for regeneration is suitably controlled. The present invention provides a method and apparatus for controlling the combustion to improve the thermal efficiency of bed regeneration in a cyclic reaction/regeneration processes. The process for thermal regeneration of a regenerative reactor bed entails (a) supplying the first reactant through a first channel means in a first regenerative bed and supplying at least a second reactant through a second channel means in the first regenerative bed, (b) combining said first and second reactants by a gas mixing means situated at an exit of the first regenerative bed and reacting the combined gas to produce a heated reaction product, (c) passing the heated reaction product through a second regenerative bed thereby transferring heat from the reaction product to the second regenerative bed.Type: GrantFiled: December 13, 2007Date of Patent: October 19, 2010Assignee: ExxonMobil Research and Engineering CompanyInventors: Krishnan Sankaranarayanan, Frank Hershkowitz, Jeffrey W. Frederick, Rajeev Agnihotri