A kind of catalytic cracking catalyst and its preparation method and application

Abstract

The invention provides a catalytic cracking catalyst, a preparation method and application of a catalytic cracking catalyst. The catalyst contains a substrate, an ultra-stable USY molecular sieve and an ultra-stable IM-5 molecular sieve; on the basis of the weight of the catalyst, the total weight content of the ultra-stable USY molecular sieve and the ultra-stable IM-5 molecular sieve is 50wt%-90wt%; the weight ratio of the ultra-stable IM-5 molecular sieve to the ultra-stable USY molecular sieve is (0.01-0.25) to 1. According to the catalytic cracking catalyst, the gasoline yield in a heavy oil fluid catalytic cracking process can be guaranteed, n-alkanes in oil slurry can be reduced, dehydrogenation reaction can be reduced under the condition of guaranteeing higher conversion rate of catalytic cracking and low carbon olefin selectivity can be improved.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst, a preparation method of the catalytic cracking catalyst and an application of the catalytic cracking catalyst in heavy oil catalytic cracking. Background technique [0002] The catalytic cracking process is a petroleum processing process that cracks heavy raw oil into light products, and at the same time, there is a part of unconverted or less converted oil slurry in the product. In order to increase the yield of high-value light products, the catalyst particles in the oil slurry are usually separated to obtain clarified oil, and then the hard-to-crack parts such as polycyclic aromatics in the clarified oil are extracted to obtain heavy cycle oil that can continue to crack, heavy cycle oil And other raw materials re-enter the catalytic cracking unit for recycling. [0003] Catalytic cracking raw materials can be divided into alkanes, cycloalkanes and aromatics according to the composition of hydr...

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Problems solved by technology

However, this is very detrimental to improving the utilization rate and conversion rate of hydrogen energy. It is necessary to further develop a more suitable catalytic cracking catalyst to reduce the high dehydroaromatization ability of aromatic groups and improve the utilization rate and conversion rate of hydrogen energy.

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