Zeolitic para-xylene separation with tetralin heavy desorbent

Details Zeolitic para-xylene separation with tetralin heavy desorbent Zeolitic para-xylene separation with tetralin heavy desorbent

1988-05-23

1989-12-12

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By contact with solid sorbent

208302, C07C 712

Patent

active

048869309

ABSTRACT:
A chromatographic process able to separate para-xylene from C.sub.8 isomers and C.sub.9 aromatics. In the process, the para-xylene-containing feed mixture is contacted with an X or Y zeolite adsorbent having Group IA or IIA cations, e.g., barium and/or potassium, 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 with tetralin. The C.sub.9 's and the other xylene isomers in the raffinate, can be separated from this heavy desorbent by fractionation of the raffinate and the desorbent recycled to the process.

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