METHOD OF OBTAINING CATALYSABLE SOOT FILTER AND CATHALISABLE SOOT FILTER Russian patent published in 2016 - IPC B01J23/44 B01J29/76 B01J29/85 B01J35/02 B01J37/25 B01D53/94 F01N3/35 

FIELD: chemistry.

SUBSTANCE: invention relates to catalysable soot filter, as well as to method of obtaining thereof. Method includes the following stages: a) provision of soot filter body with longitudinal channels, limited by longitudinal porous walls, which determine dispersal side and penetration side; b) provision of first catalytic "washcoat"-type coating, containing first catalytic composition, which is active with respect to selective catalytic reduction of nitrogen oxides, c) provision of second catalytic "washcoat"-type coating, containing second combined catalytic composition in form of mixture of catalyst, which is active with respect to selective oxidation of ammonia into nitrogen, and catalyst, which is active with respect to oxidation of carbon monoxide and hydrocarbons; d) application of first catalytic "washcoat"-type coating on soot filter body on entire dispersal side and inside separating walls of folter body and application of second catalytic "washcoat"-type coating on soot filter body on entire penetration side of filter body; and e) drying and thermal processing of coated filter with obtaining catalysable soot filter, with modal size of particles of first catalyst in first "washcoat"-type coating being smaller than average diameter of pores of longitudinal walls, and in which modal size of particles of second "washcoat"-type coating is larger than average diameter of pores of longitudinal walls.

EFFECT: technical result consists in simplification of method of obtaining soot filters.

10 cl, 1 ex