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根据个人学习经历,教材中实验室制乙烯的方法都是用浓硫酸作催化剂,加热到170℃,使乙醇发生脱水反应。2006年6月发行的苏教版新教材《有机化学基础》,把实验室制乙烯的方法改为用石棉绒作催化剂,加热,使乙醇发生脱水反应,这种方法的创新性激发了我,进而对该方法进行了验证性实验。苏教版新教材第69面蓝框内有如下一段叙述:下列活动能帮助我们认识乙醇的脱水反应。
According to personal learning experience, the method of making ethylene in the laboratory textbooks is to use concentrated sulfuric acid as a catalyst, heated to 170 °C, so that ethanol dehydration reaction. In June 2006, the Jiangsu Education Press released a new textbook, “Organic Chemistry Foundation,” which changed the method of making ethylene from laboratory to using asbestos velvety as a catalyst to heat and dehydrate the ethanol. This innovative method inspired me. Then a confirmatory experiment was performed on this method. The following is a description of the blue frame of the Jiangsu Education Press’s new teaching material: The following activities can help us to understand the dehydration reaction of ethanol.