Process for separation of C8 aromatic compounds with limited recycling

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United States of America Patent

PATENT NO 9227891
APP PUB NO 20090149686A1
SERIAL NO

12253382

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Abstract

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Process for the production of paraxylene from a C8 aromatic feedstock that comprises the following stages:

    A stage for separation by adsorption in a simulated moving bed SMB that produces an extract that contains at least 95% paraxylene and at least one raffinate R that contains ethylbenzene,A recycling of raffinate to the SMB separation stage after isomerization, in which R is separated in membrane separation means to obtain a first fraction F1 that is relatively high in ethylbenzene, which is purged, and an additional fraction F2 that is relatively low in ethylbenzene, which is recycled to the SMB after a single isomerization, preferably in the liquid phase.

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Patent Owner(s)

  • INSTITUT FRANCAIS DU PETROLE;IFP BNERGIES NOUVELLES

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baudot, Arnaud Vernaison, FR 36 209
Frising, Tom Lyons, FR 8 41
Leflaive, Philibert Mions, FR 82 292
Rodeschini, Helene Lyons, FR 4 24

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