Catalyst for purification of exhaust gases

Details Catalyst for purification of exhaust gases Catalyst for purification of exhaust gases

B - Operations, Transporting

01

J

B01J 23/72 (2006.01) B01D 53/94 (2006.01) B01J 23/89 (2006.01) B01J 29/87 (2006.01)

Patent

CA 2057634

Abstract of the Disclosure There is described a catalyst for purification of exhaust gases containing nitrogen oxides wherein oxygen is co-existent in excess of a stoichiometric amount, characterized in that a coprecipitated mixed oxide of copper and tin is loaded on a carrier composed of at least one type selected from the group consisting of crystalline aluminosilicate, aluminogallosilicate and gallosilicate, or the coprecipitated mixed oxide of copper and tin and further at least one noble metal selected from the group consisting of platinum, palla- dium, rhodium, iridium, ruthenium, silver and gold are co-loaded thereon. This invention provides a lean NOx purification catalyst having high NOx purification performance and markedly increased durability over a wide temperature range.

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