Patents by Inventor Chandrasekar Subramani

Chandrasekar Subramani 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: 12227706
    Abstract: In accordance with one or more embodiments of the present disclosure, a multi-stage process for upgrading a mixed pyrolysis oil comprising polyaromatic compounds to benzene, toluene, ethylbenzene, and xylenes (BTEX) includes combining light pyrolysis oil with heavy pyrolysis oil to form the mixed pyrolysis oil; upgrading the mixed pyrolysis oil in a slurry-phase reactor zone to produce intermediate products, wherein the slurry-phase reactor zone comprises a mixed metal oxide catalyst; and hydrocracking the intermediate products in a fixed-bed reactor zone to produce the BTEX, wherein the fixed-bed reactor zone comprises a mesoporous zeolite-supported metal catalyst.
    Type: Grant
    Filed: October 12, 2022
    Date of Patent: February 18, 2025
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Miao Sun, Sohel K. Shaikh, Wojciech Andrzej Supronowicz, Chandrasekar Subramani, Eman Z. Albaher
  • Publication number: 20240351964
    Abstract: A process for producing isopentane and isoamylene can comprise passing a feed stream comprising C5 hydrocarbons through a hydrodesulfurization assembly to produce a first stream: passing the first stream to a first separation assembly to produce a second stream and a first separated stream: passing the second stream to a deisopentanizer assembly to produce a second separated stream comprising isopentane, a third separated stream comprising C6+ hydrocarbons, and a raffinate stream comprising C5 hydrocarbons; and passing the raffinate stream to a reactor assembly to produce a reaction product stream comprising isoamylene. The present disclosure also provides for a system for producing isopentane and isoamylene.
    Type: Application
    Filed: September 12, 2022
    Publication date: October 24, 2024
    Inventors: Shehzada Khurram, Ernesto Uehara, Chandrasekar Subramani, Rathinam Jothi Mahalingam
  • Patent number: 12091619
    Abstract: A method for upgrading mixed pyrolysis oil may include contacting the mixed pyrolysis oil with hydrogen in the presence of a mixed metal oxide catalyst at reaction conditions to produce a reaction effluent including light aromatic compounds. The mixed pyrolysis oil includes multi-ring aromatic compounds and is formed from light pyrolysis oil and heavy pyrolysis oil at a ratio of 10:90 to 40:60 with light pyrolysis oil representing a bottom stream of a gas steam cracker and heavy pyrolysis oil representing a bottom stream of a naphtha steam cracker. The mixed metal oxide catalyst includes a plurality of catalyst particles with each catalyst particles including a plurality of metal oxides. An associated system for upgrading mixed pyrolysis oil may include a pyrolysis upgrading unit housing the mixed metal oxide catalyst and a separation unit operable to separate used mixed metal oxide catalyst from the reaction effluent.
    Type: Grant
    Filed: July 6, 2023
    Date of Patent: September 17, 2024
    Assignees: Saudi Arabian Oil Company, SABIC Global Technolgoies B.V.
    Inventors: Miao Sun, Sohel K Shaikh, Wojciech Andrzej Supronowicz, Chandrasekar Subramani, Eman Z Albaher
  • Publication number: 20240124789
    Abstract: In accordance with one or more embodiments of the present disclosure, a multi-stage process for upgrading a mixed pyrolysis oil comprising polyaromatic compounds to benzene, toluene, ethylbenzene, and xylenes (BTEX) includes combining light pyrolysis oil with heavy pyrolysis oil to form the mixed pyrolysis oil; upgrading the mixed pyrolysis oil in a slurry-phase reactor zone to produce intermediate products, wherein the slurry-phase reactor zone comprises a mixed metal oxide catalyst; and hydrocracking the intermediate products in a fixed-bed reactor zone to produce the BTEX, wherein the fixed-bed reactor zone comprises a mesoporous zeolite-supported metal catalyst.
    Type: Application
    Filed: October 12, 2022
    Publication date: April 18, 2024
    Applicants: Saudi Arabian Oil Company, SABIC Global Technologies B.V.
    Inventors: Miao Sun, Sohel K Shaikh, Wojciech Andrzej Supronowicz, Chandrasekar Subramani, Eman Z. Albaher
  • Publication number: 20240010934
    Abstract: A method for upgrading mixed pyrolysis oil may include contacting the mixed pyrolysis oil with hydrogen in the presence of a mixed metal oxide catalyst at reaction conditions to produce a reaction effluent including light aromatic compounds. The mixed pyrolysis oil includes multi-ring aromatic compounds and is formed from light pyrolysis oil and heavy pyrolysis oil at a ratio of 10:90 to 40:60 with light pyrolysis oil representing a bottom stream of a gas steam cracker and heavy pyrolysis oil representing a bottom stream of a naphtha steam cracker. The mixed metal oxide catalyst includes a plurality of catalyst particles with each catalyst particles including a plurality of metal oxides. An associated system for upgrading mixed pyrolysis oil may include a pyrolysis upgrading unit housing the mixed metal oxide catalyst and a separation unit operable to separate used mixed metal oxide catalyst from the reaction effluent.
    Type: Application
    Filed: July 6, 2023
    Publication date: January 11, 2024
    Applicants: Saudi Arabian Oil Company, SABIC Global Technologies B.V.
    Inventors: Miao Sun, Sohel K. Shaikh, Wojciech Andrzej Supronowicz, Chandrasekar Subramani, Eman Z. Albaher
  • Patent number: 11746299
    Abstract: A method for upgrading mixed pyrolysis oil may include contacting the mixed pyrolysis oil with hydrogen in the presence of a mixed metal oxide catalyst at reaction conditions to produce a reaction effluent including light aromatic compounds. The mixed pyrolysis oil includes multi-ring aromatic compounds and is formed from light pyrolysis oil and heavy pyrolysis oil at a ratio of 10:90 to 40:60 with light pyrolysis oil representing a bottom stream of a gas steam cracker and heavy pyrolysis oil representing a bottom stream of a naphtha steam cracker. The mixed metal oxide catalyst includes a plurality of catalyst particles with each catalyst particles including a plurality of metal oxides. An associated system for upgrading mixed pyrolysis oil may include a pyrolysis upgrading unit housing the mixed metal oxide catalyst and a separation unit operable to separate used mixed metal oxide catalyst from the reaction effluent.
    Type: Grant
    Filed: July 11, 2022
    Date of Patent: September 5, 2023
    Assignees: Saudi Arabian Oil Company, SABIC Global Technology B.V.
    Inventors: Miao Sun, Sohel K Shaikh, Wojciech Andrzej Supronowicz, Chandrasekar Subramani, Eman Z Albaher
  • Publication number: 20200354286
    Abstract: The present disclosures and inventions relate to a catalyst composition for the selective conversion of a hydrogen/carbon monoxide mixture (syngas) to C2+ hydrocarbons.
    Type: Application
    Filed: January 31, 2019
    Publication date: November 12, 2020
    Inventors: Muhammad H. Haider, Chandrasekar Subramani, Yasser T. Al-Harbi, Khalid Karim
  • Publication number: 20200353452
    Abstract: The present disclosures and inventions relate to a catalyst and method for producing and using the catalyst for the selective conversion of a hydrogen/carbon monoxide mixture (syngas) to C2+ hydrocarbons, while reducing the production of carbon dioxide.
    Type: Application
    Filed: January 31, 2019
    Publication date: November 12, 2020
    Inventors: Muhammad H. Haider, Chandrasekar Subramani, Khalid Karim