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AssigneeBASF SE
InventorsThomas Fetzer, Wolfgang Buechele, Hermann Wistuba, Bernhard Otto, Gert Buerger, Paul Pijl
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A process for the catalytic decomposition of dinitrogen monoxide in a gas stream by contacting the gas stream at temperatures of 200.degree.-900.degree. C. and pressures of 0.1 to 20 bar with a catalyst free of noble metals, the catalyst being prepared by combining a spinel CuAl.sub.2 O.sub.3 with another spinel-forming metal component selected from the group consisting of tin, lead, zinc, magnesium, calcium, strontium and barium or mixtures thereof in elemental form or as an oxide or salt, and calcining at temperatures of 300.degree.-1300.degree. C. and under pressures of 0.1-200 bar in order to at least partially liberate the copper from the spinel by replacement with the other metal component.
A process for the catalytic decomposition of dinitrogen monoxide in a gas stream which comprises contacting the gas stream at temperatures of 200.degree.-900.degree. C. and pressures of 0.1 to 20 bar with a catalyst free of noble metals, said catalyst being prepared by combining a spinel CuAl.sub.2 O.sub.4 in an Al.sub.2 O.sub.3 matrix with an additional spinel-forming metal component selected from the group consisting of tin, lead, zinc, magnesium, calcium, strontium and barium or mixtures thereof in elemental form or as an oxide or salt, and calcining at temperatures of 300.degree.-1300.degree. C. and under pressures of 0 1-200 bar for partial or complete liberation of the copper from said spinel in the form of its oxide by replacement with said additional metal component.
Dependencies are inferred from the claim text.