Abstract
Superacid WO 3/ZrO 2 catalysts have been found to show a high activity and stability in the reaction of gas-phase nitration of benzene with 70% HNO 3. At 170 °C and under atmospheric pressure the yield of nitrobenzene is within 65–80% at 99% selectivity for mononitrobenzene. The space time yield of nitrobenzene increases with increasing flow rate of reagents and amounts to 0.64 g/(g cat h).
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