Patent ID: 6916757

Claim:
A catalyst composition comprising a large pore aluminosilicate and 0.1 to about 90 weight % additive comprising: (a) about 30 to about 85% by weight zeolite having a constraint index of 1 to 12; (b) a binder system formed from components comprising greater than 9 to about 24% by weight phosphorus, measured as P 2 O 5 , based on the weight of the total additive and added alumina in an amount ranging from about 5 to about 10% by weight of the total additive; said additive further having a molar ratio of phosphorus to total alumina of at least 0.2 to about 1.9, a Davison Attrition Index for the additive equal to or less than about 20 and a total alumina content of less than 30% by weight.