The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 08, 2025
Filed:
Aug. 01, 2023
Exxonmobil Technology and Engineering Company, Annandale, NJ (US);
Bhupender S. Minhas, Bridgewater, NJ (US);
Jeevan S. Abichandani, Houston, TX (US);
Marcus L. H. Van Nuland, Rijen, NL;
Wai Kit Cheng, Lahat, MY;
Chong-Jhoo Wang, Serangoon Central, SG;
Robert G. Tinger, Friendswood, TX (US);
ExxonMobil Engineering & Technology Company, Baytown, TX (US);
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.