Exxonmobil Chemical Patents Inc.

Surbhi Jain

John Di-Yi Ou

Shifang Luke Luo

James Richardson Lattner

Larry Lee Iaccino

Stephen M Davis

Glenn C Wood

Kevin J Knob

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

The invention concerns a xylenes isomerization process for the production of equilibrium or near-equilibrium xylenes from a feedstream comprising phenol and/or styrene.

Xylene isomerization process and catalyst therefor

In a hydrocarbon upgrading process, a hydrocarbon feed is treated in at least one of a steam cracker, catalytic cracker, coker, hydrocracker, and reformer under suitable conditions to produce a first stream comprising olefinic and aromatic hydrocarbons. A second stream composed mainly of Cto Colefinic and aromatic hydrocarbons is recovered from the first stream and at least part of the second stream is contacted with a catalyst in the absence of added hydrogen under reaction conditions including a temperature of about 450&#xb0; C. to about 70&#xb0; C. effective to dealkylate, transalkylate, crack and aromatize components of the second stream to produce a third stream having an increased benzene and/or toluene content compared with the second stream and a C&#x2212; olefin by-product. The C&#x2212; olefin by-product and a fourth stream comprising toluene are then recovered from the third stream.

Process for the production of xylenes and light olefins

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Houston, TX, United States of America

Surbhi Jain