The method of producing the paraxylene which includes with 1 adsorption processes and 2 isomerization processes

摘要

Producing p-xylene from feed comprising xylenes, ethylbenzene and C9+ hydrocarbons comprises introducing feed to simulated moving bed adsorption unit to produce extract comprising p-xylene and desorbent, and intermediate raffinate comprising ethylbenzene and raffinate comprising m- and o-xylene; passing intermediate raffinate to vapor-phase isomerization unit and passing second raffinate to liquid- or vapor-phase isomerization unit.