Uop Lcc

Cara Moy Roeseler

Santi Kulprathipanja

Edith M Flanigen

Gregory J Gajda

Jennifer S Holmgren

James E Rekoske

Robert L Patton

David A Lesch

Thomas M Reynolds

John I Hammerman

The performance of an adsorptive separation process recovering para-xylene from a C aromatic hydrocarbon feed mixture is improved by operating the process at higher desorbent purity. The improved performance allows for tradeoffs in other operating parameters and rates or improved product rates. The process preferably employs a barium and potassium exchanged zeolitic molecular sieve as the adsorbent and toluene as the desorbent.

Adsorptive separation process for recovery of para-xylene

This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using a silicoaluminophosphate molecular sieve which is enriched in framework silicon at the surface, resulting in a greater yield of para-xylene compared to prior-art processes.

Aromatic isomerization using a modified silicoaluminophosphate

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Winfield, IL, United States of America

Cara Moy Roeseler