Title:
TRANSALKYLATION OF HEAVY AROMATIC HYDROCARBON FEEDSTOCKS
Document Type and Number:
WIPO Patent Application WO/2011/097003
Kind Code:
A3
Abstract:
In a process for producing xylene by transalkylation of a C9+ aromatic hydrocarbon feedstock with a C6 and/or C7 aromatic hydrocarbon, the C9+ aromatic hydrocarbon feedstock, at least one C6 and/or C7 aromatic 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 C2+ alkyl groups and to saturate C2+ 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 C9+ aromatic hydrocarbons with said at least one C6-C7 aromatic hydrocarbon to form a second effluent comprising xylene.
Inventors:
LEVIN DORON (US)
ROSS APRIL D (US)
BEECH JAMES H (US)
ROSS APRIL D (US)
BEECH JAMES H (US)
Application Number:
PCT/US2010/061308
Publication Date:
October 27, 2011
Filing Date:
December 20, 2010
Export Citation:
Assignee:
EXXONMOBIL CHEM PATENTS INC (US)
LEVIN DORON (US)
ROSS APRIL D (US)
BEECH JAMES H (US)
LEVIN DORON (US)
ROSS APRIL D (US)
BEECH JAMES H (US)
International Classes:
C07C6/12; B01J29/40; B01J29/65; C07C15/08
Domestic Patent References:
| WO2008082842A1 | 2008-07-10 |
Foreign References:
| US20090112034A1 | 2009-04-30 | |||
| US6958425B1 | 2005-10-25 | |||
| US7544849B2 | 2009-06-09 |
Other References:
SERRA, JOSE M. ET AL.: "A rational design of alkyl-aromatics dealkylation- transalkylation catalysts using C8 and C9 alkyl-aromatics as reactants", JOURNAL OF CATALYSIS, vol. 227, 17 September 2004 (2004-09-17), pages 459 - 469, XP004583883, DOI: doi:10.1016/j.jcat.2004.08.006
Attorney, Agent or Firm:
GRIFFIS, Andrew, B. et al. (Law TechnologyP.O Box 214, Baytown TX, US)
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