Method for producing paraxylene comprising an adsortion step...

Details Method for producing paraxylene comprising an adsortion step... Method for producing paraxylene comprising an adsortion step...

2011-03-29

2011-03-29

Nguyen, Tam M (Department: 1771)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By contact with solid sorbent

C585S820000, C585S477000

Reexamination Certificate

active

07915471

ABSTRACT:
A process for producing para-xylene from a hydrocarbon feed is described in which an adsorption column operating as a simulated moving bed with at least five zones delivers an extract, a 2-raffinate and an intermediate raffinate.The extract is distilled and the distillate is optionally re-crystallized to recover para-xylene with a purity of at least 99.7%. The 2-raffinate is distilled then isomerized in a reactor preferably operating in the liquid phase and at a low temperature. The intermediate raffinate with an enriched ethylbenzene content is distilled then isomerized in the vapour phase.

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