TRAPPING NO CATALYST SUPPORT MATERIAL WITH IMPROVED STABILITY AGAINST FORMATION OF BaAlO Russian patent published in 2019 - IPC C01F7/16 C01G45/12 B01J32/00 B01J21/02 B01J21/10 B01J23/34 B01J37/03 B01J37/08 B01D53/94 

FIELD: chemistry.

SUBSTANCE: invention can be used in producing catalysts for treating exhaust gases of engines. Method of producing trap NO_x catalyst support material includes obtaining a first suspension containing a homogeneous mixed oxide Mg/Al precursor and drying the first suspension. Method includes calcining a mixed oxide Mg/Al precursor to obtain a calcined mixed oxide of Mg/Al, which is resuspended to obtain a second suspension containing a mixed oxide of Mg/Al. Then, the resuspended calcined mixed oxide Mg/Al is doped with a precursor containing a manganese oxide precursor to obtain a mixed Mg/Al oxide, doped with at least manganese, and drying second suspension. Mg/Al mixed oxide is adsorbed with at least manganese to obtain doped mixed oxide of Mg/Al.

EFFECT: invention enables to obtain trapping NO_x catalyst support material having high stability against reaction with a barium-based trapping component to form an inactive BaAl₂O₄.

15 cl, 3 dwg, 3 tbl, 9 ex