Patents by Inventor Anita S. Lee
Anita S. Lee 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: 11819818Abstract: A method of producing bifunctional catalysts by extrusion may include mixing an acid catalyst, a metal catalyst, optionally a binder, and a fluid to produce a dough; extruding the dough to form an extrudate; producing a powder from the extrudate; and calcining the powder to produce an acid/metal bifunctional catalyst. Such acid/metal bifunctional catalysts may be useful in, among other things, converting syngas to dimethyl ether in a single reactor.Type: GrantFiled: August 13, 2020Date of Patent: November 21, 2023Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANYInventors: Chuansheng Bai, Jihad M. Dakka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
-
Patent number: 11691139Abstract: A method of producing bifunctional catalyst systems that include a carbon-coated metal catalyst may comprise: coating a metal catalyst particle with a carbon-containing small molecule to produce a coated metal catalyst particle; carbonizing the carbon-containing small molecule on the coated metal catalyst particle to produce a carbon-coated metal catalyst particle; and mixing the carbon-coated metal catalyst particle with an acid catalyst particle to produce an acid/metal bifunctional catalyst system.Type: GrantFiled: August 13, 2020Date of Patent: July 4, 2023Assignee: ExxonMobil Technology and Engineering CompanyInventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Dakka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
-
Patent number: 11654421Abstract: Methods of producing metal catalysts can include mixing two or more metal salts and an aluminum salt in water to produce a metal catalyst precursor solution; mixing the metal catalyst precursor solution and an alkali metal buffer solution to produce a precipitate; ion exchanging the alkali metal in the precipitate for a non-alkali cation to produce a low-alkali metal precipitate comprising 3 wt % or less alkali metal by weight of the precipitate on a dry basis; producing a powder from the low-alkali metal precipitate; and calcining the powder to produce a metal catalyst. Such metal catalysts may be useful in producing bifunctional catalyst systems that are useful in, among other things, converting syngas to dimethyl ether in a single reactor.Type: GrantFiled: August 13, 2020Date of Patent: May 23, 2023Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANYInventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Dakka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
-
Patent number: 11602734Abstract: A method of producing a acid/metal bifunctional catalyst may include: mixing an acid catalyst, a metal catalyst, and a fluid to produce a slurry, wherein the acid catalyst is present at 50 wt % or less relative to a total catalyst weight in the slurry; heating the slurry; producing a powder from the slurry; and calcining the powder to produce the acid/metal bifunctional catalyst. Such acid/metal bifunctional catalyst would be useful in the direct conversion of syngas to dimethyl ether as well as other reactions.Type: GrantFiled: August 13, 2020Date of Patent: March 14, 2023Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANYInventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Dakka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
-
Publication number: 20210046470Abstract: A method of producing bifunctional catalyst systems that include a carbon-coated metal catalyst may comprise: coating a metal catalyst particle with a carbon-containing small molecule to produce a coated metal catalyst particle; carbonizing the carbon-containing small molecule on the coated metal catalyst particle to produce a carbon-coated metal catalyst particle; and mixing the carbon-coated metal catalyst particle with an acid catalyst particle to produce an acid/metal bifunctional catalyst system.Type: ApplicationFiled: August 13, 2020Publication date: February 18, 2021Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Daaka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
-
Publication number: 20210046461Abstract: Methods of producing metal catalysts can include mixing two or more metal salts and an aluminum salt in water to produce a metal catalyst precursor solution; mixing the metal catalyst precursor solution and an alkali metal buffer solution to produce a precipitate; ion exchanging the alkali metal in the precipitate for a non-alkali cation to produce a low-alkali metal precipitate comprising 3 wt % or less alkali metal by weight of the precipitate on a dry basis; producing a powder from the low-alkali metal precipitate; and calcining the powder to produce a metal catalyst.Type: ApplicationFiled: August 13, 2020Publication date: February 18, 2021Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Daaka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
-
Publication number: 20210046464Abstract: A method of producing bifunctional catalysts by extrusion may include mixing an acid catalyst, a metal catalyst, optionally a binder, and a fluid to produce a dough; extruding the dough to form an extrudate; producing a powder from the extrudate; and calcining the powder to produce an acid/metal bifunctional catalyst. Such acid/metal bifunctional catalysts may be useful in, among other things, converting syngas to dimethyl ether in a single reactor.Type: ApplicationFiled: August 13, 2020Publication date: February 18, 2021Inventors: Chuansheng Bai, Jihad M. Daaka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
-
Publication number: 20210046462Abstract: A method of producing a acid/metal bifunctional catalyst may include: mixing an acid catalyst, a metal catalyst, and a fluid to produce a slurry, wherein the acid catalyst is present at 50 wt % or less relative to a total catalyst weight in the slurry; heating the slurry; producing a powder from the slurry; and calcining the powder to produce the acid/metal bifunctional catalyst. Such acid/metal bifunctional catalyst would be useful in the direct conversion of syngas to dimethyl ether as well as other reactions.Type: ApplicationFiled: August 13, 2020Publication date: February 18, 2021Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Daaka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
-
Patent number: 10919830Abstract: Systems and methods are provided for conversion of gas phase reactants including CO and H2 to C2+ products using multiple catalysts in a single reactor while reducing or minimizing deactivation of the catalysts. Separate catalysts can be used that correspond to a first catalyst, such as a catalyst for synthesis of methanol from synthesis gas, and a second catalyst, such as a catalyst for conversion of methanol to a desired C2+ product. The separate catalysts can be loaded into the reactor in distinct layers that are separated by spacer layers. The spacer layers can correspond to relatively inert particles, such as silica particles. Optionally, the spacer layer can include an adsorbent, such as boron supported on alumina or boron carbide particles. The adsorbent can be suitable for selective adsorption of the one or more reaction products (such as one or more reaction by-products), to allow for further reduction or minimization of the deactivation of the conversion catalysts.Type: GrantFiled: January 9, 2020Date of Patent: February 16, 2021Assignee: ExxonMobil Research and Engineering CompanyInventors: Jihad M. Dakka, Michael J. Sikorsky, Aruna Ramkrishnan, Chuansheng Bai, Anita S. Lee, Preeti Kamakoti, Anjaneya S. Kovvali, Jenna L. Walp
-
Publication number: 20200231525Abstract: Systems and methods are provided for conversion of gas phase reactants including CO and H2 to C2+ products using multiple catalysts in a single reactor while reducing or minimizing deactivation of the catalysts. Separate catalysts can be used that correspond to a first catalyst, such as a catalyst for synthesis of methanol from synthesis gas, and a second catalyst, such as a catalyst for conversion of methanol to a desired C2+ product. The separate catalysts can be loaded into the reactor in distinct layers that are separated by spacer layers. The spacer layers can correspond to relatively inert particles, such as silica particles. Optionally, the spacer layer can include an adsorbent, such as boron supported on alumina or boron carbide particles. The adsorbent can be suitable for selective adsorption of the one or more reaction products (such as one or more reaction by-products), to allow for further reduction or minimization of the deactivation of the conversion catalysts.Type: ApplicationFiled: January 9, 2020Publication date: July 23, 2020Inventors: Jihad M. Dakka, Michael J. Sikorsky, Aruna Ramkrishnan, Chuansheng Bai, Anita S. Lee, Preeti Kamakoti, Anjaneya S. Kovvali, Jenna L. Walp
-
Patent number: 10160708Abstract: Integrated methods and systems are disclosed for the production of dimethyl ether. The method may include reforming natural gas to syngas in a first reactor; contacting the syngas produced in the first reactor with a catalyst system in a second reactor to produce dimethyl ether and carbon dioxide; and supplying steam as a cofeed to at least one of the first reactor and the second reactor in an amount sufficient to achieve a Mm value of 1.4 to 1.8 or to improve the hydrocarbon or oxygenate selectivity.Type: GrantFiled: March 10, 2017Date of Patent: December 25, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Anita S. Lee, Jihad M. Dakka, Arun K. Sharma, Michel Daage, Preeti Kamakoti, Ronald Suryo, Chuansheng Bai, J. Timothy Cullinane
-
Patent number: 10093997Abstract: In various aspects, systems and methods are provided for operating molten carbonate fuel cells with processes for iron and/or steel production. The systems and methods can provide process improvements such as increased efficiency, reduction of carbon emissions per ton of product produced, or simplified capture of the carbon emissions as an integrated part of the system. The number of separate processes and the complexity of the overall production system can be reduced while providing flexibility in fuel feed stock and the various chemical, heat, and electrical outputs needed to power the processes.Type: GrantFiled: January 4, 2016Date of Patent: October 9, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Paul J. Berlowitz, Timothy Andrew Barckholtz, Anita S. Lee
-
Publication number: 20180214892Abstract: Electro-kinetic separation processes for removing solid particles from alkylated aromatic process streams are provided herein.Type: ApplicationFiled: January 5, 2018Publication date: August 2, 2018Inventors: Bhupender S. Minhas, Anita S. Lee, Ivy D. Johnson, Kyle G. Lewis, Michael F. Raterman
-
Publication number: 20170297986Abstract: Integrated methods and systems are disclosed for the production of dimethyl ether. The method may include reforming natural gas to syngas in a first reactor; contacting the syngas produced in the first reactor with a catalyst system in a second reactor to produce dimethyl ether and carbon dioxide; and supplying steam as a cofeed to at least one of the first reactor and the second reactor in an amount sufficient to achieve a Mm value of 1.4 to 1.8 or to improve the hydrocarbon or oxygenate selectivity.Type: ApplicationFiled: March 10, 2017Publication date: October 19, 2017Inventors: Anita S. LEE, Jihad M. DAKKA, Arun K. SHARMA, Michel DAAGE, Preeti KAMAKOTI, Ronald SURYO, Chuansheng BAI, J. Timothy CULLINANE
-
Patent number: 9755258Abstract: In various aspects, systems and methods are provided for operating a solid oxide fuel cell at conditions that can improve or optimize the combined electrical efficiency and chemical efficiency of the fuel cell. Instead of selecting conventional conditions for maximizing the electrical efficiency of a fuel cell, the operating conditions can allow for output of excess synthesis gas and/or hydrogen in the anode exhaust of the fuel cell. The synthesis gas and/or hydrogen can then be used in a variety of applications, including chemical synthesis processes and collection of hydrogen for use as a fuel.Type: GrantFiled: September 15, 2014Date of Patent: September 5, 2017Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Paul J. Berlowitz, Timothy A. Barckholtz, Anita S. Lee
-
Publication number: 20170191139Abstract: In various aspects, systems and methods are provided for operating molten carbonate fuel cells with processes for iron and/or steel production. The systems and methods can provide process improvements such as increased efficiency, reduction of carbon emissions per ton of product produced, or simplified capture of the carbon emissions as an integrated part of the system. The number of separate processes and the complexity of the overall production system can be reduced while providing flexibility in fuel feed stock and the various chemical, heat, and electrical outputs needed to power the processes.Type: ApplicationFiled: January 4, 2016Publication date: July 6, 2017Applicant: ExxonMobil Research and Engineering CompanyInventors: Paul J. Berlowitz, Timothy Andrew Barckholtz, Anita S. Lee
-
Patent number: 9520607Abstract: In various aspects, systems and methods are provided for operating a molten carbonate fuel cell assembly at increased power density. This can be accomplished in part by performing an effective amount of an endothermic reaction within the fuel cell stack in an integrated manner. This can allow for increased power density while still maintaining a desired temperature differential within the fuel cell assembly.Type: GrantFiled: March 13, 2014Date of Patent: December 13, 2016Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Paul J. Berlowitz, Timothy Andrew Barckholtz, Anita S. Lee
-
Patent number: 9362580Abstract: In various aspects, systems and methods are provided for operating molten carbonate fuel cells in a refinery setting. The molten carbonate fuel cells can be used to provide hydrogen to various refinery processes, including providing hydrogen in place of using a carbon-based fuel for various combustion reactions. In a further aspect, CO2-containing streams generated by refinery processes can also be used as input streams to the molten carbonate fuel cells.Type: GrantFiled: March 13, 2014Date of Patent: June 7, 2016Inventors: Paul J. Berlowitz, Timothy Andrew Barckholtz, Anita S. Lee, Frank Hershkowitz
-
Patent number: 9343764Abstract: In various aspects, systems and methods are provided for integration of molten carbonate fuel cells with a methanol synthesis process. The molten carbonate fuel cells can be integrated with a methanol synthesis process in various manners, including providing synthesis gas for use in producing methanol. Additionally, integration of molten carbonate fuel cells with a methanol synthesis process can facilitate further processing of vent streams or secondary product streams generated during methanol synthesis.Type: GrantFiled: March 13, 2014Date of Patent: May 17, 2016Assignee: ExxonMobil Research and Engineering CompanyInventors: Paul J. Berlowitz, Timothy Andrew Barckholtz, Anita S. Lee, Frank Hershkowitz
-
Patent number: 9343763Abstract: In various aspects, systems and methods are provided for integration of molten carbonate fuel cells with processes for synthesis of nitrogen-containing compounds. The molten carbonate fuel cells can be integrated with a synthesis process in various manners, including providing hydrogen for use in producing ammonia. Additionally, integration of molten carbonate fuel cells with a methanol synthesis process can facilitate further processing of vent streams or secondary product streams generated during synthesis of nitrogen-containing compounds.Type: GrantFiled: March 13, 2014Date of Patent: May 17, 2016Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Paul J. Berlowitz, Timothy Andrew Barckholtz, S. Allen Erickson, Anita S. Lee