Exxonmobil Chemical Patents Inc.

Ifp Energies Nouvelles

Axens

Thierry Leflour

Michel Molinier

Chunshe J Cao

Isabelle Prevost

Xiaobo Zheng

Jerome Pigourier

Kevin J Knob

Dennis J Stanley

Jacques Rault

Terri S Vander Pol

Stephane Claudel

Celia Fernandez

Philibert Leflaive

Catherine Laroche

Alain Dunet

Isabell Prevost

The present invention describes a process for separating xylenes in simulated counter-current (simulated moving bed, SMB) for the treatment of feeds including oxygen-containing aromatic impurities of the phenol type and/or derivatives thereof, by controlled injection of water in the ingoing streams.

Process for seperating xylenes by simulated counter-current, treating a feed including oxygen-containing aromatic impurities of the phenol type

In a process for producing para-xylene, at least one feed comprising Caromatic hydrocarbons is supplied to a dividing wall distillation column to separate the feed into a Caromatic hydrocarbon-containing stream, a Caromatic hydrocarbon-containing stream and a Caromatic hydrocarbon-containing stream. At least part of the Caromatic hydrocarbon-containing stream is then supplied to a para-xylene recovery unit to recover para-xylene from the Caromatic hydrocarbon-containing stream and produce a para-xylene depleted stream. The para-xylene depleted stream is contacted with a xylene isomerization catalyst in a xylene isomerization zone under conditions effective to isomerize xylenes in the para-xylene depleted stream and produce an isomerized stream, which is then at least partially recycled to the para-xylene recovery unit.

Aromatics production process

A method for recovering heat available at low temperature in a process and its use in order to reduce the energy consumption of the said process, and application of this method to an aromatics complex in which the low-temperature heat is recovered at the head of distillation columns in the form of low-pressure steam and is reused to reboil other distillation columns in which the operating pressure has possibly been lowered.

Method for recovering low-temperature heat and application of the method to an aromatics complex

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Paris, France

Thierry Leflour