Patents by Inventor Srikant Gopal
Srikant Gopal 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: 11986805Abstract: Systems and methods for using and regenerating a catalyst for producing acetic acid from ethane are disclosed. Feed stream comprising ethane and an oxidant including oxygen is flowed to a reactor, in which a catalyst comprising MoVNbPd oxide is disposed. The ethane and the oxidant are reacted in presence of the catalyst under reaction conditions sufficient to produce acetic acid. When the catalyst's ability to catalyze the reaction between the ethane and the oxidant is reduced by a predetermined percentage, the flow of the feed stream to the reactor is ceased. A regenerating gas stream is flowed through the reactor to contact the regenerating gas stream with the catalyst under operating conditions to increase the catalyst's ability to catalyze the reaction between the ethane and the oxidant.Type: GrantFiled: March 26, 2020Date of Patent: May 21, 2024Assignee: SABIC Global Technologies B.V.Inventors: Srikant Gopal, Turki Al-Smari, Shahid Azam, Khalid Karim
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Patent number: 11952539Abstract: The present invention provides a process for producing liquid hydrocarbon products from solid biomass and/or residual waste feedstocks.Type: GrantFiled: January 28, 2015Date of Patent: April 9, 2024Assignee: SHELL USA, INC.Inventors: Vikrant Nanasaheb Urade, Alan Anthony Del Paggio, Madhusudhan Rao Panchagnula, Laxmi Narasimhan Chilkoor Soundararajan, Srikant Gopal
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Patent number: 11883798Abstract: Methods of producing a catalyst for oxidation of C2 hydrocarbons and methods of using the catalyst are disclosed. Molybdenum, vanadium, and niobium metal or metal containing compounds are used to form a slurry in water. After agitating the slurry for at least 15 minutes, palladium or a palladium containing compound is added to the slurry. After further agitation, a precipitate is collected, dried and calcined to obtain an active catalyst, with palladium primarily distributed on a surface of the catalyst. The active catalyst is capable of catalyzing the conversion of C2 hydrocarbons into acetic acid.Type: GrantFiled: September 17, 2019Date of Patent: January 30, 2024Assignee: SABIC GLOBAL TECHNOLOGIES B.V.Inventors: Srikant Gopal, Turki Al-Smari
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Patent number: 11708315Abstract: Method for lowering aldehyde content in a mixture comprising (i) diethylene glycol (DEG) and/or triethylene glycol (TEG) and (ii) aldehyde are disclosed. An ion exchange resin is soaked in monoethylene glycol. The mixture comprising 5 to 200 ppm aldehyde is then flowed to make contact with the soaked ion exchange resin to produce a product comprising DEG and/or TEG and less than 15 ppm aldehyde.Type: GrantFiled: March 4, 2021Date of Patent: July 25, 2023Assignee: SABIC GLOBAL TECHNOLOGIES B.V.Inventors: Srikant Gopal, Adel Al-Dossari, Jintang Duan
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Publication number: 20230106288Abstract: Method for lowering aldehyde content in a mixture comprising (i) diethylene glycol (DEG) and/or triethylene glycol (TEG) and (ii) aldehyde are disclosed. An ion exchange resin is soaked in monoethylene glycol. The mixture comprising 5 to 200 ppm aldehyde is then flowed to make contact with the soaked ion exchange resin to produce a product comprising DEG and/or TEG and less than 15 ppm aldehyde.Type: ApplicationFiled: March 4, 2021Publication date: April 6, 2023Inventors: Srikant GOPAL, Adel AL-DOSSARI, Jintang DUAN
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Publication number: 20220143584Abstract: Systems and methods for using and regenerating a catalyst for producing acetic acid from ethane are disclosed. Feed stream comprising ethane and an oxidant including oxygen is flowed to a reactor, in which a catalyst comprising MoVNbPd oxide is disposed. The ethane and the oxidant are reacted in presence of the catalyst under reaction conditions sufficient to produce acetic acid. When the catalyst's ability to catalyze the reaction between the ethane and the oxidant is reduced by a predetermined percentage, the flow of the feed stream to the reactor is ceased. A regenerating gas stream is flowed through the reactor to contact the regenerating gas stream with the catalyst under operating conditions to increase the catalyst's ability to catalyze the reaction between the ethane and the oxidant.Type: ApplicationFiled: March 26, 2020Publication date: May 12, 2022Inventors: Srikant GOPAL, Turki AL-SMARI, Shahid AZAM, Khalid KARIM
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Publication number: 20210316279Abstract: Methods of producing a catalyst for oxidation of C2 hydrocarbons and methods of using the catalyst are disclosed. Molybdenum, vanadium, and niobium metal or metal containing compounds are used to form a slurry in water. After agitating the slurry for at least 15 minutes, palladium or a palladium containing compound is added to the slurry. After further agitation, a precipitate is collected, dried and calcined to obtain an active catalyst, with palladium primarily distributed on a surface of the catalyst. The active catalyst is capable of catalyzing the conversion of C2 hydrocarbons into acetic acid.Type: ApplicationFiled: September 17, 2019Publication date: October 14, 2021Applicant: SABIC Global Technologies B.V.Inventors: Srikant GOPAL, Turki AL-SMARI
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Patent number: 10647924Abstract: The present invention provides a process for producing liquid hydrocarbon products from a feedstock comprising at least one of a solid biomass-containing feedstock and a solid biomass-derived feedstock and in the range of from 50 to 15000 ppmw of chlorides, said process comprising the steps of: a) incorporating a chloride trap material into said feedstock to provide a combined feedstock/chloride trap material; b) densifying the combined feedstock/chloride trap material to form densified feed in the form of pellets or briquettes; c) contacting said densified feed with a hydropyrolysis catalyst composition and molecular hydrogen in a hydropyrolysis reactor vessel at a temperature in the range of from 350 to 600° C. and a pressure in the range of from 0.50 to 7.50 MPa to produce a product stream comprising a deoxygenated hydrocarbon product, H2O, H2, CO2, CO, C1—C3 gases, char and catalyst fines; and d) removing all or a portion of said char and catalyst fines from said product stream.Type: GrantFiled: August 2, 2017Date of Patent: May 12, 2020Assignee: SHELL OIL COMPANYInventors: Vikrant Nanasaheb Urade, Laxmi Narasimhan Chilkoor Soundararajan, Alan Anthony Del Paggio, Srikant Gopal, Prakhar Arora
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Publication number: 20190169508Abstract: The present invention provides a process for producing liquid hydrocarbon products from a feedstock comprising at least one of a solid biomass-containing feedstock and a solid biomass-derived feedstock and in the range of from 50 to 15000 ppmw of chlorides, said process comprising the steps of: a) incorporating a chloride trap material into said feedstock to provide a combined feedstock/chloride trap material; b) densifying the combined feedstock/chloride trap material to form densified feed in the form of pellets or briquettes; c) contacting said densified feed with a hydropyrolysis catalyst composition and molecular hydrogen in a hydropyrolysis reactor vessel at a temperature in the range of from 350 to 600° C. and a pressure in the range of from 0.50 to 7.50 MPa to produce a product stream comprising a deoxygenated hydrocarbon product, H2O, H2, CO2, CO, C1-C3 gases, char and catalyst fines; and d) removing all or a portion of said char and catalyst fines from said product stream.Type: ApplicationFiled: August 2, 2017Publication date: June 6, 2019Inventors: Vikrant Nanasaheb URADE, Laxmi Narasimhan CHILKOOR SOUNDARARAJAN, Alan Anthony DEL PAGGIO, Srikant GOPAL, Prakhar ARORA
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Patent number: 10190056Abstract: The present invention provides a process for producing liquid hydrocarbon products from a solid biomass feedstock, said process comprising the steps of: a) providing in a first hydropyrolysis reactor vessel a first hydropyrolysis catalyst composition; b) contacting the solid biomass feedstock with said first hydropyrolysis catalyst composition and molecular hydrogen in said first hydropyrolysis reactor vessel to produce a product stream comprising partially deoxygenated hydropyrolysis product, H2O, H2, CO2, CO, C1-C3 gases, char and catalyst fines; c) removing said char and catalyst fines from said product stream; d) hydroconverting said partially deoxygenated hydropyrolysis product in a hydroconversion reactor vessel in the presence of one or more hydroconversion catalyst and of the H2O, CO2, CO, H2, and C1-C3 gas generated in step a), to produce a vapor phase product comprising substantially fully deoxygenated hydrocarbon product, H2O, CO, CO2, and C1-C3 gases.Type: GrantFiled: June 29, 2015Date of Patent: January 29, 2019Assignee: SHELL OIL COMPANYInventors: Vikrant Nanasaheb Urade, Laxmi Narasimhan Chilkoor Soundararajan, Srikant Gopal, Madhusudhan Rao Panchagnula, Alan Anthony Del Paggio
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Patent number: 9908861Abstract: Methods of preparing a second high-efficiency, rhenium-promoted silver catalyst for producing alkylene oxide from an alkylene based on a first catalyst are disclosed and described. In accordance with the disclosed methods, the first and second catalysts include at least one promoter that includes a rhenium promoter. The target catalyst concentrations of one or more promoters of the at least one promoter on the second catalyst are determined based on the values of a catalyst reference property for the two catalysts and the concentration of the one or more promoters of the at least one promoter on the first catalyst. Suitable catalyst reference properties include carrier specific surface area and silver specific surface area. Reaction systems utilizing the first and second catalysts are also described.Type: GrantFiled: April 11, 2017Date of Patent: March 6, 2018Assignee: Dow Technology Investments LLCInventors: Hirokazu Shibata, Arun Basrur, Srikant Gopal, Mark McAdon, Albert Cheng-Yu Liu, Liping Zhang, Ernest R. Frank
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Patent number: 9782722Abstract: The present invention provides a catalyst for the decomposition of nitrous oxide, said catalyst comprising oxides of cobalt, zinc and aluminum and an alkali metal promoter.Type: GrantFiled: July 29, 2014Date of Patent: October 10, 2017Assignee: SHELL OIL COMPANYInventors: Srikant Gopal, Andreas Klemt, Ralf Schricker, Madhusudhan Rao Panchagnula
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Publication number: 20170217915Abstract: Methods of preparing a second high-efficiency, rhenium-promoted silver catalyst for producing alkylene oxide from an alkylene based on a first catalyst are disclosed and described. In accordance with the disclosed methods, the first and second catalysts include at least one promoter that includes a rhenium promoter. The target catalyst concentrations of one or more promoters of the at least one promoter on the second catalyst are determined based on the values of a catalyst reference property for the two catalysts and the concentration of the one or more promoters of the at least one promoter on the first catalyst. Suitable catalyst reference properties include carrier specific surface area and silver specific surface area. Reaction systems utilizing the first and second catalysts are also described.Type: ApplicationFiled: April 11, 2017Publication date: August 3, 2017Inventors: Hirokazu Shibata, Arun Basrur, Srikant Gopal, Mark McAdon, Albert Cheng-Yu Liu, Liping Zhang, Ernest R. Frank
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Patent number: 9649621Abstract: Methods of preparing a second high-efficiency, rhenium-promoted silver catalyst for producing alkylene oxide from an alkylene based on a first catalyst are disclosed and described. In accordance with the disclosed methods, the first and second catalysts include at least one promoter that includes a rhenium promoter. The target catalyst concentrations of one or more promoters of the at least one promoter on the second catalyst are determined based on the values of a catalyst reference property for the two catalysts and the concentration of the one or more promoters of the at least one promoter on the first catalyst. Suitable catalyst reference properties include carrier specific surface area and silver specific surface area. Reaction systems utilizing the first and second catalysts are also described.Type: GrantFiled: November 30, 2012Date of Patent: May 16, 2017Assignee: Dow Technology Investments LLCInventors: Hirokazu Shibata, Arun G. Basrur, Srikant Gopal, Mark H. McAdon, Albert Cheng-Yu Liu, Liping Zhang, Ernest R. Frank
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Publication number: 20170114283Abstract: The present invention provides a process for producing liquid hydrocarbon products from a solid biomass feedstock, said process comprising the steps of: a) providing in a first hydropyrolysis reactor vessel a first hydropyrolysis catalyst composition; b) contacting the solid biomass feedstock with said first hydropyrolysis catalyst composition and molecular hydrogen in said first hydropyrolysis reactor vessel to produce a product stream comprising partially deoxygenated hydropyrolysis product, H2O, H2, CO2, CO, C1-C3 gases, char and catalyst fines; c) removing said char and catalyst fines from said product stream; d) hydroconverting said partially deoxygenated hydropyrolysis product in a hydroconversion reactor vessel in the presence of one or more hydroconversion catalyst and of the H2O, CO2, CO, H2, and C1-C3 gas generated in step a), to produce a vapour phase product comprising substantially fully deoxygenated hydrocarbon product, H2O, CO, CO2, and C1-C3 gases.Type: ApplicationFiled: June 29, 2015Publication date: April 27, 2017Inventors: Vikrant Nanasaheb URADE, Laxmi Narasimhan CHILKOOR SOUNDARARAJAN, Srikant GOPAL, Madhusudhan Rao PANCHAGNULA, Alan Anthony DEL PAGGIO
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Publication number: 20170009143Abstract: The present invention provides a process for producing liquid hydrocarbon products from solid biomass and/or residual waste feedstocks, said process comprising the steps of: a) hydropyrolysing the solid feedstock in a hydropyrolysis reactor vessel in the presence of molecular hydrogen and one or more deoxygenation catalyst, producing a product stream comprising partially deoxygenated hydropyrolysis product, H2O, H2, CO2, CO, C1-C3 gases, char and catalyst fines; b) removing said char and catalyst fines from said product stream; c) hydroconverting said partially deoxygenated hydropyrolysis product in a hydroconversion reactor vessel in the presence of one or more hydroconversion catalyst and of the H2O, CO2, CO, H2, and C1-C3 gas generated in step a), producing a vapour phase product comprising substantially fully deoxygenated hydrocarbon product, H2O, CO, CO2, and C1-C3 gases; d) condensing the vapour phase product of step d) to provide a liquid phase product comprising substantially fully deoxygenated C4+ hyType: ApplicationFiled: January 28, 2015Publication date: January 12, 2017Inventors: Vikrant Nanasaheb Urade, Alan Anthony Del Paggio, Madhusudhan Rao Panchagnula, Laxmi Narasimhan Chilkoor Soundararajan, Srikant Gopal
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Patent number: 9458121Abstract: A method for the epoxidation of alkylenes is provided. The method makes use of an epoxidation catalyst comprising a support, silver, manganese and greater than 35 ppm sodium. The catalyst is produced by a method comprising impregnating the support with manganese prior to impregnating the support with sodium and impregnating the support with silver prior to, at the same time as, or after impregnation with manganese. A method for using the alkylene oxides for the production of 1,2-diols, 1,2-carbonates, 1,2-diol ethers is also provided.Type: GrantFiled: January 11, 2016Date of Patent: October 4, 2016Assignee: Dow Technology Investments LLCInventors: Srikant Gopal, Lakshmi N. Vutukuru Murthy, Arun G. Basrur
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Publication number: 20160199817Abstract: The present invention provides a catalyst for the decomposition of nitrous oxide, said catalyst comprising oxides of cobalt, zinc and aluminium and an alkali metal promoter.Type: ApplicationFiled: July 29, 2014Publication date: July 14, 2016Applicant: Shell Oil CompanyInventors: Srikant GOPAL, Andreas KLEMT, Ralf SCHRICKER, Madhusudhan Rao PANCHAGNULA
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Publication number: 20160122309Abstract: A method for the epoxidation of alkylenes is provided. The method makes use of an epoxidation catalyst comprising a support, silver, manganese and greater than 35 ppm sodium. The catalyst is produced by a method comprising impregnating the support with manganese prior to impregnating the support with sodium and impregnating the support with silver prior to, at the same time as, or after impregnation with manganese. A method for using the alkylene oxides for the production of 1,2-diols, 1,2-carbonates, 1,2-diol ethers is also provided.Type: ApplicationFiled: January 11, 2016Publication date: May 5, 2016Applicant: DOW TECHNOLOGY INVESTMENTS LLCInventors: Srikant Gopal, Lakshmi N. Vutukuru Murthy, Arun G. Basrur
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Patent number: 9259726Abstract: A method for producing epoxidation catalysts is provided. The catalyst comprises a support, a catalytic species, maganese and at least one alkali metal and/or promoter. The catalytic species may be silver. The catalyst is prepared by a method wherein at least a portion of the manganese is impregnated in a step separate from the at least one alkali metal and/or promoter. Advantageously, catalysts produced by the present method may exhibit greater efficiencies than catalysts produced by conventional methods. A method for the epoxidation of alkylenes using the catalysts so produced is provided as is a method for using the alkylene oxides for the production of 1,2-diols, 1,2-carbonates, 1,2-diol ethers, or alka-nolamines.Type: GrantFiled: May 25, 2012Date of Patent: February 16, 2016Assignee: Dow Technology Investments LLCInventors: Srikant Gopal, Lakshmi N. Vutukuru Murthy, Arun G. Basrur