Exxonmobil Oil Corporation

Exxonmobil Chemical Patents Inc.

Arthur P Werner

Stephen Harold Brown

Terry Eugene Helton

Jose G Santiesteban

Jean Willem Beeckman

Daria N Lissy

Bryson J Sundberg

A process for reducing the Bromine Index of a hydrocarbon feed containing bromine-reactive contaminants that has improved cycle length and utilizes a crystalline molecular sieve catalyst. The process is carried out by contacting the hydrocarbon feed under conversion conditions with a catalyst shaped in the form of an elongated aggregate comprising a crystalline molecular sieve having a MWW or *BEA framework type. The shortest cross-sectional dimension of the elongated aggregate is less about 1/10 inch (2.54 millimeters).

Process for decreasing bromine-reactive contaminants in hydrocarbon feeds

Bromine reactive hydrocarbon contaminants are removed from aromatic streams by first providing an aromatic feedstream having a negligible diene level. The feedstream is contacted with an acid active catalyst composition under conditions sufficient to remove mono-olefins. An aromatic stream may be pretreated to remove dienes by contacting the stream with clay, hydrogenation or hydrotreating catalyst under conditions sufficient to substantially remove dienes but not mono-olefins.

Decreasing Br-reactive contaminants in aromatic streams

Decreasing bi-reactive contaminants

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Marlton, NJ, United States of America

Arthur P Werner