Catalytic cracking catalyst capable of increasing yield of gasoline and preparation method thereof

Abstract

The invention provides a catalytic cracking catalyst capable of increasing the yield of gasoline and a preparation method thereof. The catalyst is prepared from 15-70 wt% of a molecular sieve, 15-60 wt% of clay, 8-30 wt% of pseudo-boehmite, 3-20 wt% of a binder, 0.01-2 wt% of phosphorus in terms of phosphorus and 0.01-3 wt% of magnesium in terms of magnesium. The preparation method comprises the following steps that (1) a phosphorus and magnesium modified Y type molecular sieve is prepared, specifically, the Y-type molecular sieve and a phosphorus-containing compound are mixed and pulped for reaction, and then a magnesium-containing compound is added for heating reaction; (2) a modified matrix material is prepared, specifically, the clay, the pseudo-boehmite, the binder and water are mixedand pulped, and the phosphorus-containing compound is added for uniform stirring; and (3) the phosphorus and magnesium modified Y type molecular sieve and the modified matrix material are mixed and pulped, and spray drying, washing, filtering and drying are carried out in sequence. The catalyst prepared through the method has strong heavy oil conversion capability and good coke and gasoline selectivity, the preparation process is simple, and industrial production is easy to realize.

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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