Patent ID: 6858129

Claim:
A process for converting hydrocarbons comprising contacting a hydrocarbon feedstream under hydrocarbon conversion conditions with a zeolite bound zeolite catalyst which does not contain significant amounts of non-zeolitic binder and comprises: (a) core crystals containing first crystals of a first zeolite and optionally second crystals of a second zeolite and when present said second zeolite has a composition, structure type, or both that is different from said first zeolite; and (b) binder crystals that bind together the core crystals and have an average particle size that is less than the average particle size of said core crystals, said binder crystals containing third crystals of a third zeolite and optionally fourth crystals of a fourth zeolite and when present said fourth zeolite has a composition, structure type, or both that is different from said third zeolite; wherein at least one of said second crystals of said second zeolite, said fourth crystals of said fourth zeolite, or both are present in said zeolite bound zeolite catalyst in an amount of from about 1.0 to about 70 percent by weight based on the weight of said zeolite bound zeolite catalyst.