Exxonmobil Chemical Patents Inc.

Ifp Energies Nouvelles

Axens

Jacques Rault

Michel Molinier

Chunshe J Cao

Xiaobo Zheng

Jerome Pigourier

Kevin J Knob

Dennis J Stanley

Thierry Leflour

Stephane Claudel

Celia Fernandez

Terri S Vander Pol

Eric Sanchez

Isabelle Prevost

Pierre-Yves Le Goff

Joana Fernandes

Odile Lajeunesse

Marielle Gagniere

Christophe Pierre

Pierre Yves Le Goff

Isabell Prevost

Claire Silberstein

The present invention relates to a device and a process for hydroconversion or hydrotreatment of a hydrocarbon feedstock, comprising in particular at least one coil-wound heat exchanger (S-), said coil-wound exchanger being a single-pass heat exchanger formed by a vertical chamber in which one or more bundles of tubes are helically wound around a central core, as numerous superposed layers, for: heating and directly distributing a hydrocarbon feedstock/hydrogen stream mixture to a hydrotreatment or hydroconversion reaction section (R-), and cooling the reaction effluent from the hydrotreatment or hydroconversion reaction section (R-). The present invention also relates to a use of a coil-wound heat exchanger (S-) in a process for hydroconversion or hydrotreatment of a hydrocarbon feedstock.

Coil-wound heat exchanger for hydrotreatment or hydroconversion

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 process for reforming a feed composed of one or more hydrocarbon cuts containing 9 to 22 carbon atoms which includes, at least one first step for reforming the feed in at least one reforming unit, during which a stream of hydrogen is produced and at least one first step for distillation of the effluent from the reforming unit in the presence of a reforming catalyst in order to obtain 4 cuts. The 4 cuts are, a liquefied petroleum gas cut (LPG) (A), a C-Ccut: naphtha (B), a C-Ccut: densified kerosene (C), and a C-Ccut: densified gas oil cut (D). The invention also concerns the device for carrying out this process.

Process for reforming hydrocarbon cuts

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Paris, France

Jacques Rault