FCC CATALYTIC COMPOSITION AND METHOD FOR ITS PRODUCTION Russian patent published in 2023 - IPC B01J29/08 B01J23/10 B01J21/04 B01J21/08 B01J37/02 C10G11/05 

FIELD: cracking.

SUBSTANCE: present invention is related to a fluid catalytic cracking catalyst composition and a process for preparing the same. The described catalytic fluid catalytic cracking composition contains: a) a Y-type zeolite, which is a sodium-free ultrastable (USY) zeolite characterized by: i) a silicon dioxide to alumina ratio (SAR) in the range from 5:1 to 15:1; ii) unit cell size (UCS) ranging from 24.25 Å to 24.65 Å; ii) a surface area ranging from 600 to 950 m²/g; and iii) soda content ranging from 0.001 mass percent to 0.5 mass percent; b) silicon oxide; c) alumina; d) at least one clay; e) at least one rare earth metal oxide; and f) at least one metal oxide. A process for preparing a fluid catalytic cracking catalyst composition comprising the following steps is also described: a) mixing a predetermined amount of Y-type zeolite, a silica precursor, an alumina precursor, at least one dispersant, and at least one clay to obtain a suspension with pH in the range from 2.0 to 10.0; b) spray drying said suspension to obtain a dried mass; c) calcining said dried mass to obtain a calcined microspheroidal catalyst; d) cooling the specified microspheroidal catalyst at a temperature in the range from 20°C to 40°C to obtain a chilled calcined microspheroidal catalyst; e) treating said cooled calcined microspheroidal catalyst with at least one organic compound at a temperature in the range of 20°C to 40°C for a time from 8 to 18 hours to obtain a treated microspheroidal catalyst; f) impregnating a specified amount of a metal salt solution of said treated microspheroidal catalyst to form a metal-impregnated treated microspheroidal catalyst; g) drying said metal salt impregnated microspheroidal catalyst followed by calcination to obtain the resultant catalyst; and h) treating said resultant catalyst with a predetermined amount of at least one rare earth metal compound, followed by filtration, drying and calcination to obtain the above FCC catalyst composition, steps (e) and (h) of this method are interchangeable.

EFFECT: catalytic composition provides an increased yield of high-quality gasoline and reduces the yield of low-value hydrocarbons, such as a clarified suspension of petroleum products and light cycle oil.

19 cl, 4 tbl, 6 ex