Patent ID: 6486370
Filing Date: 2002-11-26
Classification: B01J,C07C

Abstract:
A hydrocarbon dehydrogenation process comprising contacting a hydrocarbon stream with a layered composition under dehydrogenation conditions to give a dehydrogenated product, the layered composition comprising an inner core, an outer layer bonded to the inner core, the outer layer comprising an outer refractory inorganic oxide and having a thickness of from about 40 to about 150 microns and having uniformly dispersed thereon at least one platinum group metal and at least one promoter metal and having a concentration of the at least one platinum group metal of from about 0.02 to about 0.26 gram-mole of the platinum group metal on an elemental basis per kilogram of the outer layer, the layered composition further having dispersed thereon at least one modifier metal, the inner core and the outer refractory inorganic oxide being different materials, the layered composition further having a loading of the at least one platinum group metal of from about 5 to about 22 gram-mole of the platinum group metal on an elemental basis per cubic meter of the layered composition, the dehydrogenation conditions comprising a weight of water passed to the layered composition of less than 12 ppm based on the hydrocarbon weight passed to the layered composition.