C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 21/26 (2006.01)
Patent
CA 2300445
The invention relates to a method for producing nitric acid, according to which ammonia is burned on at least one catalyst net, especially a platinum net, in the presence of oxygen and the reaction gases are cooled. To prevent the release of laughing gas the invention is characterized in that before cooling the reaction gases are led downstream from the catalyst net across a catalyst having a stable temperature so as to transform the N2O contained in the reaction gases.
Procédé de fabrication d'acide nitrique, dans lequel on effectue la combustion de l'ammoniac sur au moins un réseau catalyseur, notamment au platine, avec amenée d'oxygène et l'on refroidit les gaz provenant de la réaction. En vue d'éviter l'émission de gaz hilarant, l'invention est caractérisée en ce que les gaz de la réaction sont envoyés, en aval du réseau catalyseur, avant refroidissement, sur un catalyseur thermiquement stable en vue de transformer le N¿2?O contenu dans les gaz de la réaction.
Klein Marton
Kubisa Ryszard
Basf Aktiengesellschaft
Robic
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