| 摘要 |
Catalyst for the purification of pollutant exhaust gases produced by industrial processes and motor vehicles, by conversion of impurities contained therein to carbon dioxide and water and removal of nitrogen oxides at elevated temperatures in contact with air, comprises a hard-baked mixture of eta and gamma aluminum oxide and a mix of the oxides of chromium and at least one element of the first transition series, wherein the chromium oxide and oxide of the element of the First Transition Series comprises more than 50% by weight of the mixture with aluminum oxide. The catalyst may take the form of molded bodies which bodies are formed completely of catalytically active aluminum oxides containing said oxides of chromium and of an element of the First Transition Series. |
