Hydrocracking catalyst containing Y-type molecular sieve, and preparation method thereof

Abstract

The invention provides a hydrocracking catalyst containing a highly-stable small-grain Y-type molecular sieve, and a preparation method thereof. A carrier of the catalyst contains the highly-stable small-grain Y-type molecular sieve, active components of the catalyst comprise at least one group VIB metal W or Mo and at least one group VIII metal Ni or Co, and an active component aid comprises P; and an improved directing agent containing a surfactant is used in the preparation of the used highly-stable small-grain Y-type molecular sieve. The highly-stable small-grain Y-type molecular sieve and the hydrocracking catalyst can be effectively and conveniently obtained through using the method; and compared with the prior art, the method has the advantages of technology simplification, selectivity increase on the basis of an enough activity, and target product yield increase.

Description

technical field [0001] The invention relates to a hydrocracking catalyst containing Y-type molecular sieves and a preparation method thereof, in particular to a hydrocracking catalyst containing high-stability small-grain Y-type molecular sieves and a preparation method thereof. Background technique [0002] As the core technology of the oil refining industry, catalytic cracking and its catalysts have attracted much attention. As the catalytic cracking feedstock becomes heavier, the proportion of macromolecular hydrocarbons with an average size above 2nm in the feedstock continues to increase. The Y-type molecular sieve, which is the main active component of the catalytic cracking catalyst, has a pore size of only 0.7nm. Obviously, a large number of raw material molecules cannot enter the channels of the Y-type molecular sieve for reaction. Although the macromolecules in the feedstock can be precracked on the catalyst substrate, the diffusion effect still has a significant ...

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