Catalytic reduction of nitrous oxide content in gases

(i) Field of the Invention A process and catalyst for reducing the nitrous oxide content in gas, which operates at relatively low temperatures, the activity of which is relatively insensitive to the presence of water vapour and which is highly resistant to hydrothermal degradation, is prepared from ferrierite exchanged with iron. Application to the treatment of gases with a low NO content, such as gases resulting from plants for the manufacture of nitric acid, and of gases with a high NO content, which are emitted during oxidations of organic compounds by nitric acid.