Exxonmobil Chemical Patents Inc.

Kevin J Knob

Timothy F Kinn

Michel Molinier

Chunshe J Cao

Xiaobo Zheng

Jerome Pigourier

Dennis J Stanley

Thierry Leflour

Jacques Rault

Terri S Vander Pol

Stephane Claudel

Celia Fernandez

John Di-Yi Ou

Isabelle Prevost

Surbhi Jain

Isabell Prevost

The invention is directed to the use of dissolved hydrogen in a purification process for the removal of Bromine Index (BI)-reactive compounds from an aromatic-containing hydrocarbon stream derived from various sources, such as petroleum fractionation, reforming, thermal cracking, catalytic cracking, isomerization, transalkylation, alkylation, coking, conversion of oxygenates, conversion of biomass, etc. The purification process comprises contacting the aromatic-containing hydrocarbon stream in the liquid phase in the presence of dissolved hydrogen with at least one suitable catalytic material under conditions effective to provide a product stream having a lower concentration of BI-reactive compounds than the untreated stream.

Removal of bromine index-reactive compounds

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 of producing PX comprising providing a C+ feedstock, the C+ feedstock has Chydrocarbons and C+ hydrocarbons, to a crystallization unit under crystallization conditions to produce a PX enriched stream having a PX concentration of at least 99.5 wt % based on the weight of the PX enriched stream, wherein the C+ feedstock has a PX concentration of at least 70 wt % based on total weight of xylenes in the C+ feedstock, which the C+ feedstock having a C+ hydrocarbons concentration in a range from 1 wppm to 10 wt % based on the total weight of the C+ feedstock.

Process and apparatus for para-xylene production

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Seabrook, TX, United States of America

Kevin J Knob