Andrussov
Andrussov : A process for making hydrogen cyanide by reacting ammonia, methane and air at approximately 1,000?C over a platinum/rhodium catalyst: 2NH3 + 3O2 + 2CH4 + 2HCN + 6H2O. The product gases are freed from ammonia by scrubbing with sulfuric acid and the hydrogen cyanide is then absorbed in water or diethanolamine. (Check source for accuracy of chemical formula)