Catalytic cracking catalyst and preparation method thereof

Abstract

The invention provides a catalytic cracking catalyst and a preparation method thereof. The catalyst comprises 5 to 65% of natural mineral matters, 10 to 60% of an oxide binder, 24 to 75% of first molecular sieves, wherein the first molecular sieves are composed of molecular sieves with pore diameters of less than 6.9 angstroms and optional Y type molecular sieves, and the amount of mesoporous protonic acid in the catalyst accounts for 20 to 70% of total acid amount. The preparation method comprises the following steps: formation of slurry including the first molecular sieves, the natural mineral matters and the inorganic oxide binder; spray drying; and treatment with alkali and compound acid. The catalytic cracking catalyst has the advantages of higher propylene yield and BTX yield when applied to catalytic cracking of petroleum hydrocarbons.

Description

technical field

[0001] The invention relates to a catalytic cracking catalyst and its preparation method and reference. Background technique

[0002] Low-carbon olefins such as ethylene, propylene, and butene are essential chemical raw materials and can be used to synthesize resins, fibers, and rubber. Among them, propylene is an important raw material used to manufacture petrochemical products after ethylene, and is mainly used to produce chemical products such as polypropylene, acrylonitrile, and propylene oxide. At present, propylene at home and abroad mainly comes from the by-products of thermal cracking to produce ethylene. The second largest source of propylene is the FCC unit, which provides about 30% of the demand. In the United States, the FCC unit provides the demand for propylene from petrochemical products. half of.

[0003] In recent years, the demand for propylene has grown rapidly. According to the forecast of HIS, by 2016, the growth rate of global propylen...

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