Preparation of hydrogen cyanide by the Andrussow-process

摘要

A mixture of methane, ammonia and oxygen to be catalytically converted to hydrogen cyanide is heated to the required reaction temperature by means of an indirect heat exchanger using the heat given out by the reaction. The heat exchanger operates in counter-flow. Air is used as the source of oxygen and may be heated separately to the required reaction temperature. Nitrogen may also be added to the mixture as ballast gas to remove heat excess to requirements.