公开(公告)号：US20230373885A1

公开(公告)日：2023-11-23

申请号：US18363360

申请日：2023-08-01

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Bhupender S. MINHAS ,  Jeevan S. ABICHANDANI ,  Marcus L.H. VAN NULAND ,  Wai Kit CHENG ,  Chong-Jhoo WANG ,  Robert G. TINGER

IPC: C07C7/144 ,  B01D61/00 ,  C07C7/00

CPC classification number: C07C7/144 ,  B01D61/007 ,  C07C7/005 ,  B01D2317/025

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.