... , xylene isomerization,ethylene-benzene alkylation,methanol converting to gasoline,methanol catalytic dehydration to produce dimethyl ether,and lower ... used as catalytic cracking active component to improve the gasoline octane number,propylene yield or hydrocarbons isomerization ability. FCC catalyst ... -1 gas(C3~C4 is 98% )≤16%petrol(octane number≥90)18.5%Diesel oil(solidifying piont≤-20 ...