MAGNESIUM-STABILIZED CRACKING CATALYSTS WITH ULTRA-LOW CONTENT OF SODIUM Russian patent published in 2019 - IPC B01J29/08 B01J37/02 C10G11/05 

FIELD: chemistry.

SUBSTANCE: invention relates to a catalytic cracking catalyst in a fluidised bed, a method for production thereof and a method for cracking in a fluidised bed in the presence of said catalyst. Disperse catalyst free from rare-earth metals with ultra-low content of sodium contains a dispersed composition containing a faujasite zeolite with catalytic cracking activity under conditions of catalytic cracking in a fluidised bed, at least one soluble magnesium salt in amount of about 0.5 wt. % up to about 3.5 wt. % in terms of oxide of total weight of catalyst composition, clay, inorganic binder, consisting of silica, peptised alumina and combinations thereof and optionally at least one matrix material consisting of silica, alumina, aluminosilicate, zirconium dioxide, titanium dioxide and combinations thereof, wherein catalyst has Na₂O content is less than 0.7 wt. %. in terms of zeolite of total weight of catalyst composition and less than 0.3 wt. % of rare-earth metals in terms of oxide of total weight of catalyst composition. Method of forming a catalyst includes: a. forming an aqueous suspension containing at least one faujasite zeolite, clay, an inorganic binder, and optionally at least one matrix material; b. optionally milling the suspension; c. spray drying the suspension to form catalyst particles; d. optionally calcination of catalyst particles at temperature and for a time sufficient to remove volatile substances; e. optionally washing catalyst particles; f. bringing catalyst particles into contact with an aqueous solution containing at least one soluble magnesium salt; and g. removing and drying the dispersed catalyst composition to obtain a final catalyst composition.

EFFECT: catalytic cracking catalyst can be used in catalytic cracking in a fluidised bed to provide high catalytic activity and improved selectivity to coke and hydrogen without the need to introduce rare-earth metals.

13 cl, 6 tbl, 4 ex