CATALYTIC ADDITIVE FOR INCREASING OUTPUT OF LIGHT OLEFINS DURING CATALYTIC CRACKING AND METHOD OF ITS PREPARATION Russian patent published in 2025 - IPC B01J29/40 B01J27/14 B01J21/16 B01J21/04 B01J37/02 B01J37/04 B01J37/08 C07C4/06 

FIELD: oil refining and petrochemical industry.

SUBSTANCE: group of inventions relates to the oil refining and petrochemical industry, namely to the preparation of a catalytic additive for increasing the output of light olefins in the process of catalytic cracking of vacuum gas oils of different quality. Proposed catalyst additive for increasing the yield of light olefins in a catalytic cracking process includes a phosphorus-modified MFI-type zeolite and a matrix consisting of bentonite clay and aluminium oxide, and wherein the MFI type zeolite has a Si/Al ratio of 15 to 40, the matrix component used is aluminium oxide from the product of thermochemical activation of alumina, with the following content of components in the additive, wt.%: phosphorus-modified MFI-type zeolite 30-50; bentonite clay 15-35; aluminium oxide 15-35. Proposed method of preparing a catalytic additive for increasing the output of light olefins in a catalytic cracking process involves modifying a zeolite of the MFI-type with phosphorus compounds, drying and calcining the zeolite, mixing the zeolite with a matrix consisting of bentonite clay and aluminium oxide, spray drying the obtained composition, followed by calcination, wherein MFI-type zeolite is modified by impregnation with phosphoric acid or urea phosphate at Si/Al ratio of 15 to 40.

EFFECT: creation of a highly effective catalytic additive for increasing the output of light olefins at high values of conversion of raw material.

5 cl, 3 tbl, 13 ex