MODIFIED Y-TYPE MOLECULAR SIEVES, CATALYTIC CRACKING CATALYST CONTAINING THEM, CATALYST PRODUCTION AND APPLICATION OF SIEVES Russian patent published in 2023 - IPC B01J29/08 B01J35/10 B01J37/08 C10G11/05 

FIELD: molecular sieves.

SUBSTANCE: modified Y-type molecular sieve for catalytic cracking of hydrocarbon oils is described, having a calcium content of 0.3-4 wt% in terms of calcium oxide, a rare earth element content of 2-7 wt% in terms of rare earth oxide, and a sodium content of not more than 0.5 wt% in terms of sodium oxide, in terms of dry matter and based on the weight of the specified modified Y-type molecular sieve; moreover, the modified Y-type molecular sieve has a total pore volume of 0.33-0.39 ml/g, the ratio of the volume of secondary pores with a pore size of 2-100 nm to the total pore volume of 10-25%, a crystal lattice constant of 2.440-2.455 nm, the ratio the content of non-lattice aluminium to the total aluminium content is not more than 20%, the temperature of destruction of the crystal lattice is not lower than 1050°C and the ratio of Bronsted acid to Lewis acid in the total acid content is not less than 2.30, as determined by infrared spectroscopy of adsorbed pyridine at 200°C. A method for producing the above-described modified molecular sieve, a catalytic cracking catalyst containing the above-described modified molecular sieve, and the use of the described catalyst in catalytic cracking are described.

EFFECT: use of the proposed molecular sieve in catalytic cracking increases the activity of heavy oil conversion, provides low coke selectivity, increases the yield of gasoline and branched C4 hydrocarbons.

15 cl, 5 tbl, 22 ex