Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By contact with solid sorbent
Patent
1991-12-23
1992-10-27
Pal, Asok
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By contact with solid sorbent
585825, 585826, 585855, C07C 712
Patent
active
051591316
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 zeolite adsorbent having barium or 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 with indan or an alkyl derivative of indan. Any C.sub.9 aromatic hydrocarbons and the other xylene isomers in the raffinate can be separated from these heavy desorbents by fractionation of the raffinate and the desorbent can be recycled to the process.
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Hall Jack H.
McBride Thomas K.
Pal Asok
Phan Nhat
Spears Jr. John F.
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