Exxonmobil Chemical Patents Inc.

Exxonmobil Research and Engineering Company

Other

John Di-Yi Ou

Mohsen N Harandi

Michael A Risch

Jeevan Sahib Abichandani

Shifang Luke Luo

John Roger Porter

Glenn Allen Heeter

James Richardson Lattner

Robert G Tinger

Terrance C Osby

Indulis J Eilands

Allen Scott Gawlik

Cor F Van Egmond

Michel Molinier

Surbhi Jain

Mark W Nash

Harold William Helmke

Harry William Deckman

Keith Holroyd Kuechler

Stephen Neil Vaughn

Teng Xu

Wenyih Frank Lai

Mark Paul Hagemeister

Hsiang-Ning Sun

Ronald Richard Chance

Bal K Kaul

Dana Lynn Pilliod

Jar-Lin Kao

Xiaobo Zheng

James H Beech

James Alexander McHenry

Juan José Reinoso

Paul F Keusenkothen

John Scott Buchanan

Doron Levin

David Lawrence Stern

Tan-Jen Chen

Kenneth Ray Clem

Daniel Paul Leta

Neeraj Sangar

Mohan Kalyanaraman

Brenda Anne Raich

Eric Bart Sirota

Sebastian Carmen Reyes

Kirk C Nadler

Charanjit Singh Paur

Lu Han

Stephen M Cundy

April D Ross

Edward W Corcoran

Jon Edmond Randolph Stanat

Jon E R Stanat

Kevin J Knob

John W Viets

Harold W Helmke

Graeme Ian Cox

Robert Michael Osman

John Michael Ferraro

Ronald L DeMartino

Blake J Aronson

Dana L Pilloid

Julian A Wolfenbarger

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 is directed to a process to produce para-xylene and, optionally, ortho-xylene, including coupling two in-series xylenes separation systems with two parallel isomerization systems for energy savings and/or productivity increases.

Energy efficient processes for xylenes production

The invention concerns a process for the production of paraxylene and an apparatus suitable for said process. The process separates the overhead from a xylenes re-run into a xylene-rich stream and a xylene-lean stream. The xylene-lean stream is isomerized under conditions such that the xylenes are in the liquid phase.

Paraxylene production process and apparatus

The invention is directed to purification of an aromatic hydrocarbon stream including selective removal of phenol from a process stream comprising aromatic hydrocarbon mixtures, especially aromatic hydrocarbon mixtures that contain higher-than-equilibrium paraxylene, by contact with suitable adsorbents, to provide a product stream having lower concentration of phenol than said process stream.

Phenol removal in paraxylene recovery process

A feedstream comprising paraxylene and styrene is contacted, in the presence of hydrogen, with a catalyst comprising at least one metal, selected from one or more metals selected from Groups 8-10.

Selective hydrogenation of styrene to ethylbenzene

The invention is directed to a process to produce para-xylene and optionally, ortho-xylene, including coupling a C-aromatics-removal system with an isomerization system or with a parallel configuration of two isomerization systems to reduce xylenes recycle for energy savings and/or productivity increases.

Process for the production of purified xylene isomers

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

The invention relates to removal of styrene from hydrocarbon mixtures, and more particularly, removal of styrene from hydrocarbon mixtures containing higher than equilibrium paraxylene concentrations.

Styrene removal in paraxylene recovery process

The invention relates to the production of paraxylene by an alkylation process that also produces oxygenates. The process is controlled to utilize recycle to minimize said oxygenates.

Alkylation process

The invention concerns a xylenes isomerization process for the production of equilibrium or near-equilibrium xylenes. The process utilizes a catalyst comprising HZSM-5 or MCM-49 and process conditions including a temperature of less than 295&#xb0; C. and a pressure sufficient to maintain the xylenes in liquid phase. In embodiments, the process can be operated in a continuous mode with ppm levels of dissolved Hin the feed and in other embodiments in a cyclic mode without the Hin feed but with periodic regenerations using a feed having low ppm levels of H.

A process for producing a PX-rich product, the process comprising: (a) providing a PX-depleted stream; (b) isomerizing at least a portion of the PX-depleted stream to produce an isomerized stream having a PX concentration greater than the PX-depleted stream and a benzene concentration of less than 1,000 ppm and a C+ hydrocarbons concentration of less than 5,000 ppm; and (c) separating the isomerized stream by selective adsorption.

Process for producing para-xylene

Growing community of inventors

Houston, TX, United States of America

John Di-Yi Ou