Patent ID: 8882993

Claim:
A stabilized aggregated form of zeolite Y comprising small size primary crystallites of zeolite Y, wherein at least 80% of the primary crystallites are aggregated to form secondary particles, wherein the zeolite exhibits (i) a silica to alumina molar ratio of 4:1 or more and (ii) an alkali metal content of less than 4 wt % and/or a rare earth metal content of at least about 2 wt %, wherein an average size of the secondary particles, as viewed from the external surface of the secondary particles, is about 0.8 micron or more, and wherein at least one of the following conditions apply: (a) an average size of the primary crystallites in the secondary particles, as viewed from the external surface of the secondary particles, is about 0.5 micron or less; (b) at least 80% of the secondary particles comprise at least 5 primary crystallites; and (c) in at least 80% of the secondary particles, a ratio of the average size of the secondary particles to the average size of the primary crystallites is at least 3:1.