Benzene → Nitric Acid

Participants

Reaction Steps

British Pat. No. 586,732 discloses that the gas-phase nitration of benzene with HNO3 or NO2 is carried out with phosphates or a sintered product of phosphoric acid supported on a solid absorbent as catalyst. According to the example, nitrobenzene is obtained by the nitration of benzene with HNO3 with calcium metaphosphate as a catalyst, but the space time yield of nitrobenzene stays at such a low level as about 0.074 kg/liter catalyst.hour under a condition that the HNO3 /benzene molar ratio is 0.364, the temperature is 175° C. and WHSV is 0.176 kg/liter catalyst.hour. The above literature gives no examples with NO2 as a nitrating agent, so that the substantial embodiment of this invention is interpreted as nitration with nitric acid.

Provenance & Evidence