常温下超声辅助合成乙酸正己酯的影响因素

Influencing factors on the preparation of hexyl acetate by ultrasound at room temperature

摘要: 以乙酸、正己醇为原料,浓硫酸为催化剂,在常温下用超声合成了乙酸正己酯.实验针对有无超声、超声频率、超声声强、温度、催化剂用量等参数对催化合成乙酸正己酯的影响.得到30℃下的优化工艺条件为:声频10kHz,声强1.0 W/cm²,催化剂用量1.0%(v/v).实验结果表明,超声在常温下辅助合成乙酸正己酯有很好的效果,酯化率能达到50%以上.该方法具有反应条件温和、操作简单且反应速度很快等优点.

Abstract: Acetic acid,hexyl alcohol and concentrated sulfuric acid were used for preparation of hexyl acetate by ultra-sound at room temperature.Ultrasonic frequency,ultrasonic intensity,temperature and amount of catalysts were inves-tigated.The optimum conditions at 30℃ were obtained as follows: the frequency is 10 kHz,ultrasound intensity is 1.0 W/cm²,the amount of catalyst is 1.0%(v/v).The results show that ultrasound can enhance the esterification of reaction and the yield of esterification can reach more than 50%.This method has some advantages such asmild reactin condition,simple operation and high reaction rate.