Toluene is mononitrated under Menke conditions by use of metallic nitrates in the presence of solid acids. Among the solid acids tested the layer-form aluminosilicate appears to be an optimum catalyst, because of its good para selectivity, resulting in a para-to-ortho ratio of 1.1~1.5 in the mononitration products of toluene.
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彭新华,吕春绪. Menke条件下甲苯的固体酸催化选择性硝化[J].含能材料, 1995, 3(4):27-30. Peng Xin-hua, Lu Chun-xu. REGIOSELECTIVE NITRTION OF TOLUENE WITHSOLID ACIDS AS CATALYSTS UNDER MENKE CONDITIONS[J]. Chinese Journal of Energetic Materials, 1995, 3(4):27-30.