China Petroleum & Chemical Corporation

Research Institute of Petroleum Processing, Sinopec

Sinopec Research Institute of Petroleum Processing Co., Ltd.

Enhui Xing

Xingtian Shu

Yibin Luo

Ying Ouyang

Chengqiang Wang

Genquan Zhu

Xiaojie Cheng

A catalytic cracking agent has an active component consisting of a phosphorus-modified molecular sieve and a non-phosphorus-modified molecular sieve or only consisting of a phosphorus-modified molecular sieve. According to an electron probe microanalysis (EPMA), the D value of phosphorus in the catalytic cracking agent is ≥65%, preferably ≥68%, provided that the active component consists of the phosphorus-modified molecular sieve and the non-phosphorus-modified molecular sieve, or the D value of phosphorus in the catalytic cracking agent is ≥82%, preferably ≥84%, provided that the active component only consists of the phosphorus-modified molecular sieve.

Catalytic cracking agent containing phosphorus-modified molecular sieve, preparation process thereof, preparation system and use thereof

A phosphorus-modified MFI-structured molecular sieve is characterized in that the molecular sieve has a K value, satisfying: 70%≤K≤90%; for example, 75%≤K≤90%; further for example, 78%≤K≤85%. The K value is as defined in the specification. A cracking auxiliary or cracking catalyst contains the phosphorus-modified MFI molecular sieve.

Phosphorus-modified MFI-structured molecular sieve, catalytic cracking auxiliary and catalytic cracking catalyst containing phosphorus-modified MFI-structured molecular sieve, and processes for preparing the same

A catalytic cracking process includes a step of contacting a cracking feedstock with a catalytic cracking catalyst in the presence of a radical initiator for reaction under catalytic cracking conditions. The radical initiator contains a dendritic polymer and/or a hyperbranched polymer. The dendritic polymer and the hyperbranched polymer each independently has a degree of branching of about 0.3-1, and each independently has a weight average molecular weight of greater than about 1000. The catalytic cracking process is beneficial to enhancing and accelerating the free radical cracking of petroleum hydrocarbon and promoting the regulation of cracking activity and product distribution; by using the process disclosed herein, the conversion of catalytic cracking can be improved, the yields of ethylene and propylene can be increased, and the yield of coke can be reduced.

Catalytic cracking process and catalyst system therefor

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Beijing, China

Enhui Xing