The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 2013
Filed:
Jan. 14, 2009
Chuen Yuan Yeh, Edison, NJ (US);
Ruozhi Song, Wilmington, DE (US);
Anne Mae Gaffney, West Chester, PA (US);
Tadeusz Langner, Maplewood, NJ (US);
Marshall J. Margolis, Freehold, NJ (US);
Chuen Yuan Yeh, Edison, NJ (US);
Ruozhi Song, Wilmington, DE (US);
Anne Mae Gaffney, West Chester, PA (US);
Tadeusz Langner, Maplewood, NJ (US);
Marshall J. Margolis, Freehold, NJ (US);
Lummus Technology Inc., Bloomfield, NJ (US);
Abstract
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° C. to about 100° 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.