Patent ID: 7396967
Filing Date: 2008-07-08
Classification: C07C,C10G,Y02P

Abstract:
1. An process for producing xylenes from naphtha, which process comprises the steps of: (a) aromatizing naphtha in an aromatization zone under aromatization conditions and the presence of a first catalyst effective for the aromatization of the naphtha to produce a reformate containing hydrogen, C (b) removing at least a portion of said hydrogen from said reformate to produce a first product having less hydrogen content than said reformate; (c) removing at least a portion of said C (d) removing at least a portion of said C (e) transferring at least a portion of said third product to a methylation reaction zone; and (f) methylating in said methylation reaction zone at least a portion of the benzene, toluene, or mixtures thereof present in said third product with a methylating agent under vapor phase conditions effective for the methylation and in the presence of a second catalyst effective for the methylation to produce a fourth product having a higher xylenes content than said reformate, wherein said second catalyst comprises a zeolite-bound-zeolite catalyst, a selectivated zeolite, ZSM-23, or a mixture thereof, and wherein said zeolite in said zeolite-bound-zeolite catalyst or said selectivated zeolite comprises ZSM-5.