US 11,999,692 B2
Non-aromatic compound removal systems for para-xylene production
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); and Robert G. Tinger, Friendswood, TX (US)
Assigned to ExxonMobil Engineering & Technology Company, Baytown, TX (US)
Filed by EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY, Annandale, NJ (US)
Filed on Aug. 1, 2023, as Appl. No. 18/363,360.
Application 18/363,360 is a continuation of application No. 17/634,956, granted, now 11,760,706, previously published as PCT/US2020/040615, filed on Jul. 2, 2020.
Claims priority of provisional application 62/886,409, filed on Aug. 14, 2019.
Prior Publication US 2023/0373885 A1, Nov. 23, 2023
Int. Cl. C07C 7/00 (2006.01); B01D 61/00 (2006.01); C07C 7/144 (2006.01)
CPC C07C 7/144 (2013.01) [B01D 61/007 (2013.01); C07C 7/005 (2013.01); B01D 2317/025 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for removing non-aromatic compounds from a para-xylene production process, comprising:
feeding a reformate stock stream through a membrane unit, the membrane unit producing a non-aromatics rich stream and a membrane unit product stream;
feeding the membrane unit product stream into a xylene splitter, the xylene splitter producing a mixed xylene stream, the mixed xylene stream comprising para-xylene, ortho-xylene, and meta-xylene;
processing the mixed xylene stream in a para-xylene recovery unit, the para-xylene recovery unit producing a para-xylene lean stream;
processing the para-xylene lean stream in an isomerization unit, the isomerization unit producing an isomerization unit product stream;
feeding the isomerization unit product stream into a deheptanizer unit, the deheptanizer unit producing a xylene rich stream;
processing the xylene rich stream through a clay treater, the clay treater producing a clay treated stream; and
feeding the clay treated stream into the xylene splitter.