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研究了以阳离子交换树脂和Ｈ－ｚｓｍ－５分子筛为催化剂，单取代苯如甲苯、乙苯和氯苯的硝化反应．结果表明，当用离子交换树脂作催化剂时，甲苯、乙苯表现出高对位选择性，其对位／邻位比分别由０．７０，１．１０增加到１．４１，２．０８。当使用Ｈ－ＺＳＭ－５分子筛作催化剂时，氯苯表现出高对位选择性。其对位／邻位比由１．７８提高到４．５３。
The nitration of mono-substituted benzenes such as toluene, ethylbenzene and chlorobenzene with cation exchange resin and H-zsm-5 zeolite as catalysts was studied. The results showed that when using ion exchange resin as catalyst, toluene and ethylbenzene showed high para selectivity and the para / ortho ratio increased from 0.70 and 1.10 to 1.41 and 2.08, respectively. Chlorobenzene exhibits high para-selectivity when H-ZSM-5 molecular sieve is used as a catalyst. The para / ortho ratio increased from 1.78 to 4.53.