Catalyst specific for catalytic cracking (DCC) process

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The catalytic cracking (DCC) process is a new technology that uses heavy distillate oil as raw material, and employs specialized catalytic cracking catalysts to produce large amounts of gaseous olefins under appropriate process conditions. The DCC process is divided into Type I and Type II. The Type I process utilizes a riser-type packed bed reactor configuration to produce low-carbon gas olefins, with the primary goal of producing propylene in large quantities. The Type II process uses only a conventional catalytic cracking riser reactor, and while incorporating some residue oil, it balances the production of low-carbon olefins and gasoline. The CRP and CIP series of catalysts are specialized catalysts for the DCC-Ⅰ and DCC-Ⅱ processes, respectively. Currently, this series of catalysts has been industrially applied in multiple plants both domestically and abroad, and has received favorable evaluations. The CRP series of catalysts features good hydrothermal stability, strong capability to convert heavy oil macromolecular hydrocarbons, high yields of low-carbon olefins, excellent wear resistance, and high balanced activity. To meet the requirements of the DCC-Ⅱ process, which emphasizes high yields of low-carbon olefins while also allowing the incorporation of some residue, the CIP series catalysts must possess high activity to accommodate the use of residue, while at the same time suppressing the activity of hydrogen transfer reactions in order to ensure high olefin yields. Therefore, the CIP series of catalysts features high cracking activity, good stability, excellent olefin selectivity, high gasoline octane number, and strong wear resistance