CATALYTIC MIXTURES Russian patent published in 2018 - IPC B01J29/85 B01J29/76 B01J29/00 B01D53/94 

FIELD: chemistry.

SUBSTANCE: invention relates to compositions of a catalyst for processing NO_x in the spent gas from combustion of the lean fuel mixture consisting of a mixture of aluminosilicate molecular sieve with a DPA frame and the silica-alumina-phosphate molecular sieves with a DPA frame. Herewith in the declared composition, the aluminosilicate molecular sieve and the silica-alumina-phosphate molecular sieve present in the molar ratio of aluminosilicate: silica-alumina-phosphate from 0.8:1.0 to 1.2:1.0. The specified aluminosilicate molecular sieve includes the first extra-framework metal, the specified silica-alumina-phosphate molecular sieve includes the second extra-framework metal, where the said first and the second extra-framework metals are independently selected from the group comprising copper, iron, manganese, and combinations thereof, where the specified first extra-framework metal is present in an amount of 2 to 4 wt %, based on the weight of aluminosilicate, and where the mass ratio of the said first extra-framework metal and the said second extra-framework metal is from 0.4:1.0 to 1.5:1.0. The ratio of silica to alumina (SAR) in the said aluminosilicate is from 10 to 35.

EFFECT: obtaining more durable and highly efficient SCR catalysts.

14 cl, 4 dwg, 1 ex