CATALYST FOR CATALYTIC CRACKING AND METHOD OF INCREASING CATALYST SELECTIVITY (VERSIONS) Russian patent published in 2015 - IPC B01J29/04 B01J29/08 B01J29/18 B01J29/40 B01J29/50 B01J29/60 B01J29/65 B01J29/70 B01J37/10 C10G11/18 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing a catalyst for catalytic cracking, a method of catalytic cracking and the obtained catalyst application. The method contains the supply of the fresh catalyst into a fluidised bed, where it contacts with water vapour or a regenerated flue gas, and its ageing under hydrothermal conditions, including the temperature of ageing of 400-850°C, the surface linear rate of the fluidised bed of 0.1-0.6 m/s and the ageing time of 1-720 hours with the further supply of the produced catalyst into an industrial installation of catalytic cracking. The fresh catalyst contains, with respect to the total catalyst weight, 1-50% by weight of zeolite, 5-99% by weight of inorganic oxide, selected from SiO₂ and/or Al₂O₃, and 0-70% by weight of additional clay. Clay is selected from kaolin and/or halloysite. Zeolite is selected from medium-pore zeolite ZSM or ZRP and/or large-pore zeolites, selected from a rare-earth element Y(REY), rare-earth hydrogen Y(REHYK) of ultrastable zeolite Y and high-silica zeolite Y. Another method of obtaining the catalyst contains: (1) supply of the fresh catalyst into the fluidised bed, introduction of a hot regenerated catalyst into the regenerator, with the realisation of heat exchange between the fresh catalyst and the hot regenerated catalyst in the fluidised bed; (2) realisation of contact of the product, obtained at stage (1) with vapour or with the regenerated flue gas under hydrothermal conditions, including the temperature of ageing of 400-850°C, the surface linear rate of the fluidised bed of 0.1-0.6 m/s and the time of ageing of 1-720 hours to obtain an aged catalyst, and (3) supply of the catalyst, produced at stage (2), into an industrial installation of catalytic cracking.

EFFECT: method makes it possible to regulate the catalyst activity and selectivity in an installation of catalytic cracking more evenly and considerably improves the selectivity of the catalytic cracking catalyst to considerably reduce the output of dry gas and coke, effectively use vapour and reduce energy consumption in FCC cracking.

15 cl, 4 dwg, 4 tbl, 3 ex