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根据提高温度有利于对甲苯磺酸的生成以及对甲苯磺酸一水化合物能从稀硫酸中结晶出来的原理,采用浓硫酸过量,甲苯滴加到90~100℃的浓硫酸中反应,改进了对甲苯磺酸制备实验;改进的方法制备收率高,反应操作简单,更有利于实验教学。
According to the principle that increasing the temperature is favorable for the formation of p-toluenesulfonic acid and p-toluenesulfonic acid monohydrate can be crystallized from dilute sulfuric acid, toluene is added dropwise to the concentrated sulfuric acid at 90-100 ° C by using an excess of concentrated sulfuric acid to improve the Preparation of p-toluenesulfonic acid experiment; Improved preparation of high yield, the reaction is simple, more conducive to experimental teaching.