METHOD OF PREPARING CATALYST AND CATALYST FOR OXIDISING AND CLEANING GASES Russian patent published in 2012 - IPC B01J37/25 B01J21/04 B01J23/38 B01J23/63 

FIELD: chemistry.

SUBSTANCE: invention relates catalysts and methods of producing said catalyst. Described is a method of preparing a catalyst, involving pre-treatment of an inert block support made from Al-containing foil by calcining at temperature of (850-920)°C in an air current for (12-15) hours and depositing an intermediate coat on its surface at room temperature, said coat being modified aluminium oxide from a suspension containing aluminium hydroxide, aluminium nitrate, cerium nitrate, basalt flake from super-thin basalt fibre with elementary particle diameter of 1-3 mcm and length of up to 1000 mcm and water, heat treatment of the block with the intermediate coat in an air current and depositing one or more catalytically active platinum group metals, said suspension having the following ratio of components, wt %: aluminium hydroxide - (22.0-32.0), aluminium nitrate - (2.0-4.0), cerium nitrate - (3.0-7.0), basalt fibre - (1.3-3.5), water - up to 100; heat treatment of the block with the intermediate coat is carried out at temperature of (660-700)°C and ageing for (70-90) minutes. Described is a catalyst prepared using the method described above, having a block metallic support, an intermediate coat of modified aluminium oxide and an active phase from platinum group noble metals deposited on the porous surface of the intermediate coat, containing (9.0-20.0) wt % modified Al₂O₃, having specific surface area of (120-140) m²/g, containing aluminium oxide, cerium oxide, the modified aluminium oxide additionally containing basalt, with the following ratio of components, wt %: aluminium oxide (73.2-90.5), cerium oxide (5.2-13.8), basalt (4.3-13.0).

EFFECT: catalyst with high mechanical strength and thermal stability is obtained.

2 cl, 2 tbl, 9 ex