HONEYCOMB-STRUCTURE BLOCK CATALYST FOR SELECTIVE OXIDATION OF AMMONIA INTO NITROGEN OXIDE Russian patent published in 2003 - IPC

FIELD: oxidation catalysts. SUBSTANCE: invention provides non-platinoid block catalyst for oxidation of ammonia in nitric acid and hydroxylamine production processes. Catalyst contains iron and aluminum oxides and promoter, the latter including at least one compound of elements from following group: Co, Mn, V, Mo, Sn, Bi, or their combinations, and aluminum oxide precursor being aluminum compound of formula Al₂O₃•n H₂O, where 0,3≤n≤1,5, which has layered X-ray-amorphous structure. Aluminum oxide precursor may further contain at least one compound of Si, Mg, or Ca in amounts no higher than 1.0 wt % on conversion to oxide. Thus prepared alumina-based catalyst contains 65-86% Fe₂O₃, 0.1-15% promoter, and additionally titanium oxide in amounts no higher than 5% to increase heat resistance of catalyst. EFFECT: achieved combination of high mechanical strength, heat resistance, and high catalytic activity. 3 cl, 2 dwg, 1 tbl, 7 ex