Exxonmobil Chemical Patents Inc.

Julia Elizabeth Steinheider

Doron Levin

James Harding Beech, Jr

Selma SheungNam Lawrence

Kenneth Ray Clem

Yun-Feng Chang

Thomas Herman Colle

Gerald G McGlamery, Jr

Patricia A O'Neill-Burn

This disclosure relates to a process for regenerating a catalyst composition to improve the aging rate in subsequent cycles.

Catalyst regeneration process

This disclosure relates to a process for regenerating a catalyst composition, wherein the catalyst composition comprising a molecular sieve and at least 10 wt. % coke having a C/H molar ratio in the range of 0.26 to 5, the process comprising (a) contacting the catalyst composition with a first oxidative medium having oxygen and water at first conditions sufficient to form a first regenerated catalyst composition having at least 50 wt. % less coke than the catalyst composition; and then (b) contacting at least a portion of the first regenerated catalyst composition with a second oxidative medium having oxygen, and optionally water, at second conditions sufficient to form a second regenerated catalyst composition having at least 50 wt % less coke than the first regenerated catalyst composition, wherein the catalyst composition in step (a) and the first regenerated catalyst in step (b) have contacted total amount of water in the range of 1 to 50 weight water per weight of the second regenerated catalyst composition.

A guard bed or absorber is placed upstream of a transalkylation reactor to avoid deposition of halide and/or halogen species on the catalysts in said reactor.

Purification of transalkylation feedstock

This invention is to a process for separating condensed water and entrained solids from an olefin stream so that fouling of the separation equipment by the entrained solids is reduced or eliminated. The process involves injecting an antifouling agent into a water condensing or quench system in an amount to maintain a zeta potential of fouling liquid and a zeta potential of the surface of the quench system both in a positive range or both in a negative range.

Growing community of inventors

Houston, TX, United States of America

Julia Elizabeth Steinheider