Adsorptive separation of para-xylene using isopropylbenzene deso

Details Adsorptive separation of para-xylene using isopropylbenzene deso Adsorptive separation of para-xylene using isopropylbenzene deso

1997-06-25

1998-12-15

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By contact with solid sorbent

585831, G07C 713

Patent

active

058499814

ABSTRACT:
The cost of separating para-xylene from other xylene isomers and C.sub.9 aromatics by adsorption on zeolitic molecular sieves is reduced by the use of 1,4 diisopropylbenzene as a relatively high boiling desorbent. The desorbent has surprisingly high strength and selectivity characteristics with the preferred desorbent. The preferred adsorbent is an X zeolite containing barium or both barium and potassium ions at exchangeable cationic sites. The para-xylene components are selectively adsorbed onto the adsorbent. The non-adsorbed feed is then removed from the adsorbent and the para-xylene recovered by desorption.

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