公开(公告)号：US11760706B2

公开(公告)日：2023-09-19

申请号：US17634956

申请日：2020-07-02

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 ,  C07C7/10 ,  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.

公开(公告)号：US11999692B2

公开(公告)日：2024-06-04

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: C07C7/00 ,  B01D61/00 ,  C07C7/144

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.

公开(公告)号：US20230406789A1

公开(公告)日：2023-12-21

申请号：US18363382

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 ,  B01D2317/025 ,  C07C7/005 ,  B01D61/007

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.