Catalyst for purifying nitrogen oxides from exhaust and...

Details Catalyst for purifying nitrogen oxides from exhaust and... Catalyst for purifying nitrogen oxides from exhaust and...

B - Operations, Transporting

01

J

252/45

B01J 27/053 (2006.01) B01D 53/94 (2006.01) B01J 27/02 (2006.01)

Patent

CA 1221953

ABSTRACT OF THE DISCLOSURE A catalyst for the purification of an exhaust gas by the removal, through selective reduction, of nitrogen oxides present in the exhaust gas which comprises (A) 80 to 95% by weight of a sulfur oxide-containing catalytic oxide obtained by thermally treating at least one hydrous oxide compound selected from the group consisting of binary hydrous oxide compound of titanium and silicon, binary hydrous oxide compound of titanium and zirconium and ternary hydrous oxide compound of titanium, zirconium and silicon in the presence of at least one sulfur compound selected from the group consisting of sulfuric acid and ammonium sulfate, (B) 0 to 5% by weight of a catalytic oxide comprising vanadium oxide, (C) 1 to 15% by weight of a catlytic oxide comprising the oxide of at least one metal selected form the group consisitng of tungsten, molybdenum, tin and cerium.

465978

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