MODIFIED Y-TYPE MOLECULAR SIEVE AND PREPARATION METHOD THEREOF, HYDROCRACKING CATALYST AND PREPARATION METHOD THEREOF, AND METHOD FOR HYDROCRACKING HYDROCARBON OIL

摘要

A modified Y-type molecular sieve contains 0.5-2 wt. % of Na₂O based on the total amount of the modified Y-type molecular sieve. In the modified Y-type molecular sieve, the ratio between the total acid amount measured by pyridine and infrared spectrometry and total acid amount measured by n-butyl pyridine and infrared spectrometry is 1-1.2. The total acid amount measured by pyridine and infrared spectrometry of the modified Y-type molecular sieve is 0.1-1.2 mmol/g. The acid center sites of the molecular sieve of the modified Y-type molecular sieve are distributed in the large pore channels. The molecular sieve is used in the hydrocracking reaction process of a wax oil.