A catalyst composition suitable for reacting hydrocarbons, e.g., conversion processes
such as fluidized catalytic cracking (FCC) of hydrocarbons, comprises attrition
resistant particulate having a high level (30-85%) of stabilized zeolites having
a constraint index of 1 to 12. The stabilized zeolite is bound by a phosphorous
compound, alumina and optional binders wherein the alumina added to make the catalyst
is about 10% by weight or less and the molar ratio of phosphorous (P2O5)
to total alumina is sufficient to obtain an attrition index of about 20 or less.
The composition can be used as a catalyst per se or as additive catalyst to a conventional
catalyst and is especially suitable for enhancing yields of light olefins, and
particularly ethylene, produced during conversion processes.
