Patents by Inventor Wai Kit Cheng

Wai Kit Cheng 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: 11999692
    Abstract: Selective removal of non-aromatic hydrocarbons from a xylene isomerization process for para-xylene production is accomplished using a membrane unit positioned within a xylene recovery loop. The membrane unit may include a one-stage or multi-stage (e.g., two-stage) membrane system and may be configured to separate a membrane unit product stream from a non-aromatics rich stream, which can be removed from the xylene recovery loop. The membrane unit may have a xylene permeance of about 60 gm/m2/hr/psi and a xylene to non-aromatic permeance ratio of about 15.
    Type: Grant
    Filed: August 1, 2023
    Date of Patent: June 4, 2024
    Assignee: ExxonMobil Engineering & Technology Company
    Inventors: Bhupender S. Minhas, Jeevan S. Abichandani, Marcus L. H. Van Nuland, Wai Kit Cheng, Chong-Jhoo Wang, Robert G. Tinger
  • Publication number: 20230406789
    Abstract: Selective removal of non-aromatic hydrocarbons from a xylene isomerization process for para-xylene production is accomplished using a membrane unit positioned within a xylene recovery loop. The membrane unit may include a one-stage or multi-stage (e.g., two-stage) membrane system and may be configured to separate a membrane unit product stream from a non-aromatics rich stream, which can be removed from the xylene recovery loop. The membrane unit may have a xylene permeance of about 60 gm/m2/hr/psi and a xylene to non-aromatic permeance ratio of about 15.
    Type: Application
    Filed: August 1, 2023
    Publication date: December 21, 2023
    Inventors: Bhupender S. MINHAS, Jeevan S. Abichandani, Marcus L.H. Van Nuland, Wai Kit Cheng, Chong-Jhoo Wang, Robert G. Tinger
  • Publication number: 20230373885
    Abstract: Selective removal of non-aromatic hydrocarbons from a xylene isomerization process for para-xylene production is accomplished using a membrane unit positioned within a xylene recovery loop. The membrane unit may include a one-stage or multi-stage (e.g., two-stage) membrane system and may be configured to separate a membrane unit product stream from a non-aromatics rich stream, which can be removed from the xylene recovery loop. The membrane unit may have a xylene permeance of about 60 gm/m2/hr/psi and a xylene to non-aromatic permeance ratio of about 15.
    Type: Application
    Filed: August 1, 2023
    Publication date: November 23, 2023
    Inventors: Bhupender S. MINHAS, Jeevan S. ABICHANDANI, Marcus L.H. VAN NULAND, Wai Kit CHENG, Chong-Jhoo WANG, Robert G. TINGER
  • Patent number: 11760706
    Abstract: Selective removal of non-aromatic hydrocarbons from a xylene isomerization process for para-xylene production is accomplished using a membrane unit positioned within a xylene recovery loop. The membrane unit may include a one-stage or multi-stage (e.g., two-stage) membrane system and may be configured to separate a membrane unit product stream from a non-aromatics rich stream, which can be removed from the xylene recovery loop. The membrane unit may have a xylene permeance of about 60 gm/m2/hr/psi and a xylene to non-aromatic permeance ratio of about 15.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: September 19, 2023
    Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY
    Inventors: Bhupender S. Minhas, Jeevan S. Abichandani, Marcus L. H. van Nuland, Wai Kit Cheng, Chong-Jhoo Wang, Robert G. Tinger
  • Publication number: 20220281784
    Abstract: Selective removal of non-aromatic hydrocarbons from a xylene isomerization process for para-xylene production is accomplished using a membrane unit positioned within a xylene recovery loop. The membrane unit may include a one-stage or multi-stage (e.g., two-stage) membrane system and may be configured to separate a membrane unit product stream from a non-aromatics rich stream, which can be removed from the xylene recovery loop. The membrane unit may have a xylene permeance of about 60 gm/m2/hr/psi and a xylene to non-aromatic permeance ratio of about 15.
    Type: Application
    Filed: July 2, 2020
    Publication date: September 8, 2022
    Inventors: Bhupender S. Minhas, Jeevan S. Abichandani, Marcus L.H. van Nuland, Wai Kit Cheng, Chong-Jhoo Wang, Robert G. Tinger