Pentasil-type molecular sieve containing composition and its preparation method
 A molecular sieve containing composition, which can be applied in catalytic cracking reaction for producing more ethylene and propylene, and its preparation method. The composition contains a pentasil-type molecular sieve having a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of 15-60, prepared by activation and modification with phosphorus, alkaline earth metal and transition metal. The composition essentially includes 85.about.98% wt of pentasil-type molecular sieve, 1.about.10% wt of P.sub.2 O.sub.5, 0.3.about.5% wt of alkaline earth oxide, and 0.3.about.5% wt of transition metal oxide. The molecular sieve structure and active centers have high thermal and hydrothermal stability. The salient feature of this composition is that when applied as an active component of cracking catalyst for catalytic pyrolysis process, the yield of ethylene is above 18% and the total yield of ethylene and propylene is more than 40%. 
China Petrochemical Corporation Research Institute of Petroleum Processing
C C B B
C10G C10G B01J B01J
inventional additional inventional additional
Fengming Weidong Fengmei Xingtian Xieqing Zhicheng
Qin Wang Zhang Shu Wang Shi