按照现行化学教材高中课本第二册第261页,制取硝基苯的实验步骤进行操作,需时13分钟,才能完成。而且硝基苯的产量不多。按教材水浴加热时,上层是苯(为红棕色),下层是浓硝酸和浓硫酸的混和液,界面之间发生反应,可以看到有产物呈絮状下沉,同时温度升高,苯挥发加剧。 In accordance with the current chemistry textbook High School Textbook Volume 2, page 261, the experimental procedure for the preparation of nitrobenzene is carried out. It takes 13 minutes to complete. And the production of nitrobenzene is not much. When heated by the textbook water bath, the upper layer is benzene (reddish-brown), and the lower layer is a mixture of concentrated nitric acid and concentrated sulfuric acid. The reaction occurs between the interfaces. It can be seen that the product is floccular sinking, and the temperature is increased, and the benzene is volatilized. Intensified.