高中化学教材中实验室制取乙烯气体存在以下问题 :一是反应时间较长 ,产率不高 ,温度不易控制且产生易挥发的无色液体乙醚等副产物 ;二是由于硫酸的浓度较大 ,又在加热条件下 ,从而使酒精发生炭化和氧化 ,反应混合液变黑并产生ＳＯ2 、ＣＯ2 、ＣＯ等气体 ,污染环境 ,影响实验 High school chemistry textbooks in the laboratory for the production of ethylene gas has the following problems: First, the reaction time is longer, the yield is not high, the temperature is not easy to control and produce volatile colorless liquid ether and other by-products; second is due to the higher concentration of sulfuric acid In addition, under the heating conditions, carbonization and oxidation of alcohol occur, and the reaction mixture turns black and generates gases such as SO2, CO2, and CO, polluting the environment and affecting the experiment.