Exxonmobil Chemical Patents Inc.

Exxonmobil Technology and Engineering Company

Exxonmobil Oil Corporation

Badger Licensing LLC

Wei-Ping Tai

Doron Levin

Terry Eugene Helton

John P McWilliams

Ajit Bhaskar Dandekar

Matthew J Vincent

Kathleen M Keville

Matthew Scott Ide

Vijay Nanda

Federico Barrai

C Morris Smith

Michael Alan Better

William W Lonergan

Teresa A Jurgens-Kowal

Brett T Loveless

Catalyst compositions comprising a zeolite and a mesoporous support or binder are disclosed. The mesoporous support or binder comprises a mesoporous metal oxide having a particle diameter of greater than or equal to 20 μm at 50% of the cumulative pore size distribution (d). Also disclosed are processes for producing a mono-alkylated aromatic compound (e.g., ethylbenzene or cumene) which exhibit improved yield of the mono-alkylated aromatic compound using alkylation catalysts comprising one or more of these catalyst compositions.

Catalyst compositions and their use in aromatic alkylation processes

This disclosure relates to a method for rejuvenating a catalyst, comprising contacting the catalyst with a gaseous feedstock at rejuvenation conditions for at least one hour to form a rejuvenated catalyst and a gaseous product, wherein the catalyst comprises at least 10 wt. % of a molecular sieve, wherein the catalyst prior to the contacting step comprises from 0.001 wt. % to 45 wt. % of hydrocarbons and 0.001 to 10 wt. % nitrogen containing components based on the total weight of the catalyst prior to the contacting step, wherein the molecular sieve comprises at least one of a MCM-22 family molecular sieve, a molecular sieve having a framework type of *BEA, a molecular sieve having a framework type of FAU, and a molecular sieve having a framework type of MOR, wherein the gaseous feedstock comprises at least one of N, H, alkane, He, Ar, CO, and CO, wherein the gaseous product has at least a portion of the gaseous feedstock and at least a portion of the hydrocarbons of the catalyst and at least a portion of the nitrogen containing components of the catalyst, wherein the rejuvenation conditions comprise a temperature in the range from about 400 to 600&#xb0; C., a pressure in the range from about 101.3 kPa-a to 10130 kPa-a, a space hourly velocity in the range of from 0.05 to 10 hr.

Process for rejuvenating a catalyst composition

A process for alkylating an alkylatable aromatic compound is disclosed, in which the process includes: The process provides comparable rejuvenation of catalyst activity as air rengenaration with minimal or no increase in amounts of undesirable byproducts such as polypropylbenzenes in the case of benzene alkylation with propylene.

Regeneration of aromatic alkylation catalysts using hydrocarbon stripping

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Yardley, PA, United States of America

Wei-Ping Tai