Patent ID: 7271118
Filing Date: 2007-09-18
Classification: B01J,C10G

Abstract:
1. A two component catalyst system catalyst which exhibits a ratio of ethylene saturation to aromatics ring saturation of greater than 10,000, said system comprising: (a) a first component present in an amount of at least 5 percent by volume of said catalyst system and effective for converting ethylbenzene and comprising a first molecular sieve having a Constraint Index of about 1 to about 12 and an effective amount of a Group VIII metal; and, (b) a second component effective for isomerizing xylenes and comprising a second molecular sieve having a Constraint Index of about 1 to about 12 and an effective amount of a Group VIII metal, wherein said first component has an alpha value that is at least twice the alpha value of the second component, and wherein said first component and said second component are selected to effectively achieve a ratio of ethylene saturation to aromatics ring saturation of greater than 10.000 and an xylene loss level of less than 2 wt %.