Green method for nitrifying benzene with nitric acid to prepare nitrobenzen

The invention relates to a green method for nitrifying benzene with nitric acid to prepare nitrobenzen. The method takes silica-loaded cesium phosphomolybdate or cesium phosphotungstate as a catalyst, and employs nitric acid as a nitrating agent to nitrify benzene so as to prepare nitrobenzen. The method disclosed in the invention eliminates unsafe factors in generating polynitrobenzene, oxygen-containing compounds and other detonation matters, and has high yield, convenient catalyst recovery, reutilization and other environmental protection characteristics.