COMPOSITE MATERIAL Russian patent published in 2022 - IPC B01J29/76 B01J35/04 B01J37/10 C01B39/04 B01D53/94 B01D53/56 

FIELD: composite materials.

SUBSTANCE: invention relates to composite material, a method for its production, a composition of a selective catalytic reduction catalyst, a catalytic product, the use of composite material, and to a system of exhaust gas treatment. Composite material contains macro-porous silicate-based material, from 30 to 70 wt.% of macro-porous silicate-based material has a microporous structure containing zeolite, where microporous zeolite is functionalized with copper or iron or functionalized with copper and iron, and where composite material has the form of particles. Microporous zeolite is zeolite with a small pore size, having the maximum size of a ring of eight tetrahedrally coordinated atoms. Macro-porous silicate-based material contains diatomaceous earth. Composite material is obtained using a method including following stages: (i) provision of a mixture containing a framework including silicate and having a macro-porous structure, an aluminum source, and organic template, where the framework including silicate contains diatomaceous earth; (ii) hydrothermal treatment of the mixture to form a microporous structure containing zeolite, essentially preserving the macro-porous structure of the framework including silicate; (iii) inclusion of copper, iron, or both copper and iron into zeolite with a small pore size, having the maximum size of the ring of eight tetrahedrally coordinated atoms.

EFFECT: provision of better access to catalytically active centers in a catalyst and a high level of NO_x conversion.

12 cl, 5 dwg, 3 tbl, 3 ex