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:
Jan. 14, 2014
Filed:
Mar. 10, 2010
Matthew J. Vincent, Kingwood, TX (US);
Vijay Nanda, Houston, TX (US);
Maruti Bhandarkar, Kingwood, TX (US);
Brian Maerz, Chelmsford, MA (US);
Terry E. Helton, Bethlehem, PA (US);
Matthew J. Vincent, Kingwood, TX (US);
Vijay Nanda, Houston, TX (US);
Maruti Bhandarkar, Kingwood, TX (US);
Brian Maerz, Chelmsford, MA (US);
Terry E. Helton, Bethlehem, PA (US);
Stone & Webster, Inc., Houston, TX (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
Disclosed is a process for the production of alkylated aromatics by contacting a feed stream comprising an alkylatable aromatic, an alkylating agent and trace amounts of water and impurities in the presence of first and second alkylation catalysts wherein the water and impurities are removed in order to improve the cycle length of such alkylation catalysts. Water and a portion of impurities are removed in a dehydration zone. A first alkylation zone having a first alkylation catalyst which, in some embodiments is a large pore molecular sieve, acts to remove a larger portion of impurities, such as nitrogenous and other species, and to alkylate a smaller portion of the alkylatable aromatic compound. A second alkylation zone, which in some embodiments is a medium pore molecular sieve, acts to remove a smaller portion of impurities, and to alkylate a larger portion of the alkylatable aromatic compound.