摘要
研究了以固体超强酸SO24-/TiO2-La3+作为催化剂,浓硝酸和甲苯为原料合成硝基甲苯,并考察了影响反应的因素。结果表明,催化剂用浓度为1.0 mol.L-1硫酸浸泡3小时,反应催化剂用量为硝酸质量的10%,反应时间为3小时,反应温度为55℃是最适宜的反应条件,甲苯转化率达90.14%,邻对比达0.89。
The nitration of toluene using solid superacid SO4^2-/TiO2-La^3＋ as catalyst and nitric acid as nitrating agent was studied. Some effects of the reaction conditions on the convemion of toluene and the ration of o-nitrotoluene to p-nitrotoluent （o/p） of the product were discussed. The optimum conditions of nitration were determined as follows： the solid superacid soaked 1.0mol^-1 sulphuric acid 3hours, and amount of catalyst 10% （based on the quantity of nitric acid）, reaction temperature 55℃, reaction time 3 hours. Under these conditions,the convemion of toluene was 90. 14% and o/p was 0. 89.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2006年第9期1052-1056,共5页
Chemical Research and Application
