Adsorptive separation of para-xylene using diethyltoluene...

Details Adsorptive separation of para-xylene using diethyltoluene... Adsorptive separation of para-xylene using diethyltoluene...

C - Chemistry, Metallurgy

07

C

182/6.5

C07C 15/08 (2006.01) C07C 7/13 (2006.01)

Patent

CA 1328082

ADSORPTIVE SEPARATION OF PARA-XYLENE USING DIETHYLTOLUENE DESORBENT ABSTRACT Para-xylene is separated from other C8 isomers and/or C9 aromatics by contacting the para-xylene-containing feed mixture 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 is selectively adsorbed onto the adsorbent. The feed is then removed from the adsorbent and the para-xylene recovered from the resulting rich adsorbent by desorption with diethyltoluene. The C9's and the other xylene isomers are typically recovered in the desorbent-containing raffinate and can be separated from this desorbent by fractionation of the raffinate and the desorbent recycled to the process.

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