ZEOLITE CATALYSTS CONTAINING METALS Russian patent published in 2017 - IPC B01J29/72 B01J23/78 B01J37/03 B01J37/30 B01D53/00 

FIELD: chemistry.

SUBSTANCE: invention relates to catalyst composition suitable for treating the exhaust gas comprising: a) aluminosilicate zeolite material including silica and alumina in CHA frame and having silica to alumina ratio (SAR) of 10-25; b) 1-5 weight percent of the base metal (B_M) based on total weight of the zeolite material, where the said base metal is located in the said zeolite material as a free and/or non-framed, exchange metal; c) an alkaline earth metal (generally A_M) disposed in the said zeolite material in the form of free and/or non-framed exchange metal, where B_M and A_M are present respectively in a molar ratio of 15:1-1:1. The aluminium dioxide contains aluminium (Al), which is a part of the zeolite frame, and the catalyst composition has (B_M+A_M) molar ratio: Al 0.1-0.4, and A_M is calcium. The invention also relates to catalytically active layer of porous oxide, the catalytic device for processing the exhaust gas and method for reducing NO_x in the exhaust gas.

EFFECT: increasing the hydrothermal stability of the material.

16 cl, 5 dwg, 2 tbl, 5 ex