CATALYST AND METHOD OF CONVERTING AMMONIA Russian patent published in 2009 - IPC B01J23/72 B01J23/74 B01J21/00 B01J23/843 B01J23/847 B01J23/34 C01B21/26 

FIELD: chemistry.

SUBSTANCE: description is given of a catalyst for converting ammonia to nitrogen (II) oxide with a block cellular structure, with the shape of a rectangular prism or oblique prism with obliquity of 0-45°, coefficient of thermal expansion in the interval 10^-7-10^-5 K^-1 in the temperature range of 900°C, based on mixed oxides with general formula: xMe₁O·yMe₂O·(1-x-y)(2MgO·(2-z)Al₂O₃·(5+z)SiO₂), where: x=0.03-0.25; y=0.01-0.1; z=0-2, Me₁ - is an active component; Me₂ - is a structural promoter. Described also is a method of catalytic conversion of ammonia, which involves passing a reaction gaseous mixture, containing ammonia and an oxygen containing gas, through a two-stage catalyst system, made using different methods, including in a set with trapping platinoid gauze and/or inert packing. The proposed catalyst is used in the second stage.

EFFECT: catalyst has high activity, selectivity and resistance to thermo-cycles when used in a two-stage system.

6 cl, 3 tbl, 13 ex