CATALYST AND AMMONIA CONVERSION PROCESS Russian patent published in 2004 - IPC

FIELD: nitrogen compounds production.

SUBSTANCE: invention relates to catalyst and ammonia conversion process used in weak nitric acid production. Ammonia conversion catalyst represents a honeycomb-structure block catalyst based on mixed oxides depicted by general formula: ((2-x)MgO·xMeO)·2-y)Al₂O₅·Al₂O₃·(5+y(2-x))SiO₂, where x=0-2, y=0-0.5, and Me is Mn, Fe, Co, Ni, Cu, Cr, V, or their mixtures, forming frame structure of cordierite with thermal expansion factor ·10^-7- 10^-5 K^-1 within temperature range up to 900^оС. Catalytic conversion of ammonia involves passing gaseous reaction mixture comprising ammonia and oxygen-containing gas through double-step catalytic system formed by a variety of ways including combination with trapping platinoid gauzes and/or inert charge in the first step and claimed catalyst in the second step.

EFFECT: increased activity and selectivity of catalyst as well as its resistance to thermocycles.

4 cl, 2 tbl, 10 ex