Lummus Technology Inc.

Marshall J Margolis

Anne Mae Gaffney

Ruozhi Song

Chuen Yuan Yeh

Tadeusz W Langner

A catalyst useful for the alkylation or transalkylation of aromatic compounds is disclosed. The catalyst is an acid-treated zeolitic catalyst produced by a process including contacting an acidic zeolitic catalyst comprising surface non-framework aluminum and framework aluminum with an organic dibasic acid at a catalyst to acid weight ratio in the range from about 2:1 to about 20:1 and at a temperature in the range from about 50&#xb0; C. to about 100&#xb0; C. to selectively remove at least a portion of the surface non-framework aluminum. The resulting catalyst may have a measured first-order rate constant, k, for the alkylation of benzene with propylene to form cumene, of at least 2.0 cm/s g.

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Freehold, NJ, United States of America

Marshall J Margolis