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:
Apr. 14, 2015
Filed:
May. 22, 2013
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Doron Levin, Highland Park, NJ (US);
April D. Ross, Beaumont, TX (US);
James H. Beech, Jr., Kingwood, TX (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
In a process for producing xylene by transalkylation of a C+ aromatic hydrocarbon feedstock with a Cand/or Caromatic hydrocarbon, the C+ aromatic hydrocarbon feedstock, at least one Cand/or Caromatic hydrocarbon and hydrogen are contacted with a first catalyst comprising (i) a first molecular sieve having a Constraint Index in the range of about 3 to about 12 and (ii) at least first and second different metals or compounds thereof of Groups 6 to 12 of the Periodic Table of the Elements. Contacting with the first catalyst is conducted under conditions effective to dealkylate aromatic hydrocarbons in the feedstock containing C+ alkyl groups and to saturate C+ olefins formed so as to produce a first effluent. At least a portion of the first effluent is then contacted with a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 under conditions effective to transalkylate C+ aromatic hydrocarbons with said at least one C-Caromatic hydrocarbon to form a second effluent comprising xylene.