METHOD OF PREPARING CATALYST FOR CRACKING VACUUM GAS OIL WITH CONTROLLED OUTPUT OF C3 AND C4 OLEFINS Russian patent published in 2015 - IPC B01J29/80 B01J37/04 B01J29/08 B01J29/40 B01J27/14 B01J21/02 B01J21/16 C10G11/05 

FIELD: chemistry.

SUBSTANCE: method of preparing a catalyst for cracking vacuum gas oil with controlled output of C₃ and C₄ olefins includes mixing an ultrastable zeolite Y in cation-decationated form and zeolite HZSM-5 with matrix components in the form of amorphous aluminosilicate, aluminium hydroxide and bentonite clay, spray drying the obtained composition, followed by calcination and obtaining a catalyst. Before mixing with catalyst components, aluminium hydroxide is treated with orthophosphoric acid to achieve phosphorus content with respect to aluminium oxide of 1 to 10 wt %. Content of the catalyst components is as follows, wt %: zeolite NRZEU 10-20, zeolite HZSM-5 2-20, aluminium hydroxide treated with orthophosphoric acid 10-20, amorphous aluminosilicate 28-38, bentonite clay 15-25.

EFFECT: obtaining a highly active catalyst, which provides controlled output of light C₃-C₄ olefins.

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