Andrussov process

Proceedings [2] short mentioniong on the Degussa variant for hydrogen-cyanide synthesis (no details) [71] sections in reviews [87,88,90,96,97,114] trade press [81]. 

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These reactions are very important industrially in the production of HNO3 (p. 466). See also the industrial production of HCN by the Andrussov process (p. 321) 2NH3 + 3O2 + 2CH4 ------ 2HCN + 6H2O. 

Many examples of safe processing in micro reactors have been reported. Among them, the formation of the poisonous hydrogen cyanide is often mentioned [5], Rinard and Saha refer to the non-oxidative Degussa variant [174] of this synthesis [85], while a micro reactor has performed the oxidative formation of hydrogen cyanide [175] via the Andrussov process [176,177]. 

Beneficial Micro Reactor Properties for the Andrussov Process... 

This was a development of the Andrussov process by which methane yields hydrogen cyanide. In one important version, propylene and ammonia yield acrylonitrile ... 

Degussa Also called BMA. The process by which this large German company is best known is its version of the Andrussov process for making hydrogen cyanide. Methane and ammonia are reacted in the absence of air, at approximately 1,400°C, over a platinium metal catalyst ... 

Gauzes are the state of the art for many millisecond-reactions performed in industry. The best-known examples are the oxidation of ammonia to NO for the production of nitric acid and the Andrussov process, in which HCN is produced from methane and ammonia (32) ... 

Ponton [60] discusses exemplarily a miniplant concept for performing the Andrussov process, yielding hydrogen cyanide from methane, oxygen and ammonia with a platinum catalyst. HCN is a widely used but highly toxic chemical which requires extreme safety issues, in particular when it is transported or shipped. A miniplant should allow one to produce this toxic material from comparably low toxic ammonia and methane directly on-site at the customer and on-demand in small or even bigger quantities. 

When a metal-catalyzed reaction is so fast that external mass transfer controls, several layers of fine wire screen can be used as the catalyst bed. The catalytic oxidation of ammonia to nitric oxide, which is the first step in nitric acid production, is carried out with screens (called gauzes) of Pt/Rh alloy, and very high ammonia conversions are obtained. Similar gauzes are used in the Andrussov process for manufacture of HCN from CH4, NH3, and O2. Wire screens are also used for catalytic incineration of pollutants and in improving combustion efficiency in gas burners. 

Andrussov process A catalytic process used for the production of hydrogen cyanide by the reaction of atmnoiua, methane, and air at a temperature of around 1,000 C using a platinum catalyst ... 

The Andrussov Process for the manufacture of hydrogen cyanide by am-moxidation of methane is now widely used ... 

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