Patent ID: 6710003
Filing Date: 2004-03-23
Classification: B01J,Y10T

Abstract:
A process for preparing a layered catalyst composition comprising an inner core, an outer layer bonded to the inner core, the outer layer bonded to the inner core such that the attrition loss is less than 25% of the weight of the outer layer, and the outer layer comprising a zeolite and a binder, the process comprising:a) coating the inner core with a slurry comprising the zeolite, a sol of the binder, and an organic bonding agent to yield a coated core having the outer layer; b) drying the coated core at a temperature from about 50Â° C. to about 300Â° C. to yield a dried coated core; and, c) calcining the dried coated core at a temperature from about 400Â° C. to about 900Â° C. for a time sufficient to bond the outer layer to the inner core and provide the layered catalyst composition.