A kind of prolific gasoline catalytic cracking catalyst and preparation method thereof

Abstract

The invention provides a prolific gasoline catalytic cracking catalyst and a preparation method thereof. The catalyst comprises 15-70wt% molecular sieve, 15-60wt% clay, 8-30wt% pseudo-boehmite, 3-20wt% binder, and 0.01-2wt% phosphorus in terms of phosphorus, and 0.01-3wt% magnesium in terms of magnesium. The preparation method is as follows: (1) Preparation of Y-type molecular sieve modified by phosphorus and magnesium: mixing Y-type molecular sieve and phosphorus-containing compound for beating reaction, and then adding magnesium-containing compound to raise the temperature for reaction. (2) Preparation of modified matrix material: mix clay, pseudo-boehmite, binder and water for beating, add phosphorus-containing compound and stir evenly. (3) mixing and beating the above-mentioned phosphorus and magnesium modified Y-type molecular sieves and modified matrix materials, followed by successive steps of spray drying, washing, filtering and drying. The catalyst prepared by the invention has strong heavy oil conversion ability, good coke and gasoline selectivity, simple preparation process and easy industrial production.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst and a preparation method thereof, in particular to a prolific gasoline catalytic cracking catalyst and a preparation method thereof. Background technique [0002] In recent years, with the adjustment of China's economic structure, the growth rate of domestic diesel demand has slowed down. Refineries adjust the structure of oil products by reducing the ratio of diesel to gasoline produced to adapt to changes in market demand and ensure the balance between supply and demand in my country's refined oil market. FCC gasoline accounts for 75% of the domestic gasoline pool. Therefore, it is most effective to increase gasoline production and reduce diesel-gasoline ratio around optimizing FCC scheme. Aiming at this, people have done a lot of research on molecular sieve modification, catalyst manufacturing and process design (Liu Tao, Zhang Zhongdong, Zhang Haitao, etc. Sinoforeign Energy. 2009, 14(1): 71-7...

AI Technical Summary

Problems solved by technology

However, the above patented molecular sieve modification process must go through a roasting process, the preparation process is cumbersome, consumes a lot of energy, and requires a large number of modifications to existing production equipment to achieve industrial production, resulting in high catalyst preparation costs and difficult operations.

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