Patents by Inventor Preeti Kamakoti

Preeti Kamakoti 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: 20240093100
    Abstract: Provided herein are catalysts for dewaxing of a feedstock, the catalyst comprising between about 40 wt. % and about 99.9 wt. % zeolite, between about 0 wt. % and about 40 wt. % binder and at least about 0.1 wt. % noble metal, as well as catalyst systems, methods and products produced using the catalysts. The zeolite having a crystal comprising a largest included sphere less than or equal to about 7.5 angstroms, a largest diffusing sphere greater than or equal to about 5.0 angstroms, and a silica to alumina ratio greater than or equal to about 100:1. The catalyst having a temperature-programmed ammonia desorption (“TPAD”) of less than about 0.25 mmol/g.
    Type: Application
    Filed: January 24, 2022
    Publication date: March 21, 2024
    Applicant: ExxonMobil Technology and Engineering Company
    Inventors: William J. Knaeble, Scott J. Weigel, Preeti Kamakoti
  • Publication number: 20240002417
    Abstract: Methods are provided for synthesizing metal organic framework compositions in an aqueous environment and/or in a mixed alcohol/water solvent. The methods can allow for formation of MOF-274 metal organic framework compositions, such as EMM-67 (a mixed metal MOF-274 metal organic framework composition). More generally, the methods can allow for formation of MOF structures that include disalicylate linkers in an aqueous environment and/or in a mixed alcohol/water solvent.
    Type: Application
    Filed: July 1, 2022
    Publication date: January 4, 2024
    Inventors: Anna C. IVASHKO, Carter W. ABNEY, Nicole M. HERB, Preeti KAMAKOTI, Aaron W. PETERS, Matthew T. KAPELEWSKI, Marc H. ANTHONIS, Roxana PEREZ VELEZ, Nadya A. HRYCENKO, Doron LEVIN, Tara L. REDDINGTON, Scott J. WEIGEL
  • Publication number: 20240001335
    Abstract: Methods are provided for synthesizing metal-organic framework compositions using synthesis mixtures with elevated solids content and/or elevated kinematic viscosity. The methods can allow for formation of MOF-274 metal-organic framework compositions, such as EMM-67 (a mixed-metal MOF-274 metal-organic composition). More generally, the methods can allow for formation of MOF structures that include multi-ring disalicylate organic linkers using synthesis mixtures that contain a reduced or minimized amount of solvent, such as down to having substantially no solvent in the synthesis mixture.
    Type: Application
    Filed: July 1, 2022
    Publication date: January 4, 2024
    Inventors: Anna C. IVASHKO, Aaron W. PETERS, Preeti KAMAKOTI, Scott J. WEIGEL, Matthew T. KAPELEWSKI, Nicole M. HERB, Roxana PEREZ VELEZ, Marc H. ANTHONIS, Doron LEVIN, Tara L. REDDINGTON
  • Patent number: 11819818
    Abstract: 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: Grant
    Filed: August 13, 2020
    Date of Patent: November 21, 2023
    Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY
    Inventors: Chuansheng Bai, Jihad M. Dakka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
  • Publication number: 20230249121
    Abstract: Methods of designing zeolite materials for adsorption of CO2. Zeolite materials and processes for CO2 adsorption using zeolite materials.
    Type: Application
    Filed: March 31, 2023
    Publication date: August 10, 2023
    Inventors: Peter I. Ravikovitch, David Sholl, Charanjit Paur, Karl G. Strohmaier, Hanjun Fang, Ambarish R. Kulkarni, Rohan V. Awati, Preeti Kamakoti
  • Publication number: 20230249120
    Abstract: Methods of designing zeolite materials for adsorption of CO2. Zeolite materials and processes for CO2 adsorption using zeolite materials.
    Type: Application
    Filed: March 31, 2023
    Publication date: August 10, 2023
    Inventors: Peter I. Ravikovitch, David Sholl, Charanjit Paur, Karl G. Strohmaier, Hanjun Fang, Ambarish R. Kulkarni, Rohan V. Awati, Preeti Kamakoti
  • Patent number: 11691139
    Abstract: 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: Grant
    Filed: August 13, 2020
    Date of Patent: July 4, 2023
    Assignee: ExxonMobil Technology and Engineering Company
    Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Dakka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
  • Patent number: 11654421
    Abstract: 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: Grant
    Filed: August 13, 2020
    Date of Patent: May 23, 2023
    Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY
    Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Dakka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
  • Patent number: 11642619
    Abstract: Methods of designing zeolite materials for adsorption of CO2. Zeolite materials and processes for CO2 adsorption using zeolite materials.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: May 9, 2023
    Assignees: Georgia Tech Research Corporation, EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY
    Inventors: Peter I. Ravikovitch, David Sholl, Charanjit Paur, Karl G. Strohmaier, Hanjun Fang, Ambarish R. Kulkarni, Rohan V. Awati, Preeti Kamakoti
  • Patent number: 11638912
    Abstract: 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 having a pH of about 2.5 to about 4.0; mixing the metal catalyst precursor solution and a basic solution having a pH of about 10 to about 13 to produce a mixture with a pH of about 6 to about 7 and a precipitate; producing a powder from the 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: Grant
    Filed: August 13, 2020
    Date of Patent: May 2, 2023
    Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY
    Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Daaka, Preeti Kamakoti, Aruna Ramkrishnan
  • Patent number: 11602734
    Abstract: 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: Grant
    Filed: August 13, 2020
    Date of Patent: March 14, 2023
    Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY
    Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Dakka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
  • Patent number: 11542446
    Abstract: Methods are provided for using a molecular sieve catalyst for dewaxing formed using a synthesis mixture comprising a morphology modifier. The catalyst may be used, for example, for production of a lubricant base stock. For example, ZSM-48 crystals formed using the morphology modifier (and/or formulated catalysts made using such crystals) can have an increased activity and/or can provide an improved yield during catalytic dewaxing of lubricant base stocks.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: January 3, 2023
    Assignee: Exxon Mobil Technology and Engineering Company
    Inventors: Preeti Kamakoti, Scott J. Weigel, Stephen J. McCarthy, Shifang L. Luo, Sina Sartipi, Martine Dictus, Marc H. Anthonis, Helge Jaensch
  • Patent number: 11318450
    Abstract: Processes are provided for preparing molecular sieves. The process involves preparing a synthesis mixture for the molecular sieve wherein the synthesis mixture includes a morphology modifier L selected from the group consisting of nonionic surfactants, anionic surfactants, sugars and combinations thereof.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: May 3, 2022
    Assignee: ExxonMobil Research & Engineering Company
    Inventors: Preeti Kamakoti, Scott J. Weigel, Karl G. Strohmaier, Helge Jaensch, Marc H. Anthonis, Martine Dictus, Brita Engels, Darryl D. Lacy, Sina Sartipi
  • Patent number: 11318451
    Abstract: Processes are provided for preparing molecular sieves of framework structure MEI, TON, MRE, MWW, MFS, MOR, FAU, EMT, or MSE. The process involves preparing a synthesis mixture for the molecular sieve wherein the synthesis mixture includes a morphology modifier L selected from the group consisting of cationic surfactants having a quaternary ammonium group comprising at least one hydrocarbyl group having at least 12 carbon atoms, nonionic surfactants, anionic surfactants, sugars and combinations thereof.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: May 3, 2022
    Assignee: ExxonMobil Research & Engineering Company
    Inventors: Preeti Kamakoti, Scott J. Weigel, Karl G. Strohmaier, Helge Jaensch, Marc H. Anthonis, Martine Dictus, Brita Engels, Darryl D. Lacy, Sina Sartipi, Brandon J. O'Neill
  • Publication number: 20220126278
    Abstract: Methods and corresponding catalysts are provided for conversion of an aromatics feed containing C8+ aromatics, particularly C9+ aromatics, to form a converted product mixture comprising, e.g., benzene and/or xylenes. The aromatic feed can be converted in the presence of a catalyst that includes a mixture of a first zeolite having an MEL framework, such as ZSM-11, and a second zeolite having a MOR framework, such as mordenite, particularly a mordenite synthesized using TEA or MTEA as a structure directing agent. The weight ratio of the first zeolite to the second zeolite in the catalyst can be from 0.3 to 1.2, or from 0.3 to 1.1, or from 0.3 to 1.0. The catalyst can further include one or more metals supported on the catalyst, such as a combination of metals.
    Type: Application
    Filed: March 26, 2020
    Publication date: April 28, 2022
    Inventors: Maryam Peer, Joseph E. Gatt, Preeti Kamakoti, William J. Knaeble, Wenyih F. Lai, Paul Podsiadlo, Dominick A. Zurlo, Thomas J. Ferro, Doron Levin, Benjamin C. Gamoke
  • Patent number: 11111153
    Abstract: Processes are provided for preparing molecular sieves for use as catalysts. The process involves preparing a synthesis mixture for the molecular sieve wherein the synthesis mixture includes a morphology modifier which may be selected from cationic surfactants having a single quaternary ammonium group comprising at least one hydrocarbyl group having at least 12 carbon atoms, nonionic surfactants, anionic surfactants, sugars, and combinations thereof.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: September 7, 2021
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Preeti Kamakoti, Scott J. Weigel, Karl G. Strohmaier, Helge Jaensch, Marc H. Anthonis, Martine Dictus, Brita Engels, Darryl D. Lacy, Sina Sartipi
  • Publication number: 20210046470
    Abstract: 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: Application
    Filed: August 13, 2020
    Publication date: February 18, 2021
    Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Daaka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
  • Publication number: 20210046461
    Abstract: 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: Application
    Filed: August 13, 2020
    Publication date: February 18, 2021
    Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Daaka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee
  • Publication number: 20210046460
    Abstract: 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 having a pH of about 2.5 to about 4.0; mixing the metal catalyst precursor solution and a basic solution having a pH of about 10 to about 13 to produce a mixture with a pH of about 6 to about 7 and a precipitate; producing a powder from the 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: Application
    Filed: August 13, 2020
    Publication date: February 18, 2021
    Inventors: Chuansheng Bai, Majosefina Cunningham, Jihad M. Daaka, Preeti Kamakoti, Aruna Ramkrishnan
  • Publication number: 20210046464
    Abstract: 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: Application
    Filed: August 13, 2020
    Publication date: February 18, 2021
    Inventors: Chuansheng Bai, Jihad M. Daaka, Preeti Kamakoti, Aruna Ramkrishnan, Anjaneya S. Kovvali, Anita S. Lee