Formanilide → Phenyl isocyanate

Participants

Reaction Steps

The experiment of Example X was repeated in such a way that a mixture of phenyl formamide and benzonitrile was evaporated at a rate of 5 ml/hour in a gas stream of 110 liters of nitrogen and 3 liters of air/hour. The gas mixture also comprised carbon disulphide, which was fed at a rate of 0.67% per hour, calculated on the added amount by weight of n-hexyl formamide. Use of the same catalyst bed as in Example XIX at a temperature of 375° C. resulted in a yield of phenyl isocyanate of 41% at a selectivity of 74%.

Provenance & Evidence