Patent ID: 8183424
Filing Date: 2012-05-22
Classification: B01J,C07C,Y02P

Abstract:
1. A process for producing xylene by transalkylation of a C 9 + aromatic hydrocarbon feedstock with a C 6 and/or C 7 aromatic hydrocarbon, the process comprising: (a) contacting a C (b) contacting at least a portion of said first effluent with a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 under conditions effective to transalkylate C (c) contacting at least a portion of said second effluent comprising xylene with a third catalyst comprising a third molecular sieve having a Constraint Index in the range of about 3 to about 12 under conditions effective to crack non-aromatic cyclic hydrocarbons in said second effluent and form a third effluent comprising xylene.