【摘要】 介绍了应用正交法设计乙酸甲酯制备教学实验的方法,分析了醇酸摩尔比、催化剂用量、分馏柱长度这三个因素对乙酸甲酯收率的影响,筛选出制备的最佳实验条件为醇酸摩尔比为1.3∶1,催化剂用量为1.5 m L,分馏柱长度30 cm,实现以较少的试验次数达到与全面试验相近的结果。在化学实验教学时,将实验操作训练与数据处理知识相结合,不仅提高了学生的学习兴趣,还让他们更好地理解实验设计思想,培养了他们分析问题和解决问题的实践能力和创新能力,取得了良好的教学效果。更多还原

【Abstract】 This paper introduces the application of orthogonal design for the teaching experiment of methyl acetate synthesis method, analyzes the effects of the molar ratio of alcohol/acid, catalyst dosage, fractionating column length of these three factors on the yield of methyl acetate. The optimum experimental conditions for synthesis are selected as follows: the molar ratio of alcohol/acid is 1. 3 ∶ 1,catalyst dosage is 1. 5 m L and fractionating column is 30 cm in length. And the results are similar to the comprehensive test with less test times. In chemical experiment teaching, the combination of experimental operation training and data processing knowledge not only improves students’ learning interest,but also enables them to better understand the idea of experimental design, cultivate their practical and innovative ability to analyze and solve problems, and achieve good teaching effects.更多还原