强酸性阳离子交换树脂催化合成丁酸己酯的研究

Study on Synthesis of the Hexyl Butyrateby Strongly Acid Cation Exchange Resin

以丁酸、正己醇为原料,直接酯化合成丁酸己酯,分别研究了反应温度、反应时间、原料配比、带水剂、催化剂用量等条件对合成反应的影响,确定了最佳工艺条件。该方法合成丁酸己酯的最佳工艺条件是:反应温度120℃、反应时间3.5h、n(正己醇):n(丁酸)为1.2、催化剂用量为2.32%、带水剂环己烷为15mL(丁酸为0.2mol的情况下)。丁酸己酯的收率达到95.86%。催化剂不经处理可循环使用多次。该催化剂具有价廉易得、催化活性好、不腐蚀设备、无环境污染等优点。

The hexyl butyrate was synthesized from n-hexanol and butyric acid by direct esterification.The effect of reaction temperature, reaction time, materials ratio, taling water reagent, the content of catalyst on the synthesis were studied, and the proper technological conditions were given as follows： the reaction temperature is 120℃, reaction time is 3.5h, n（n-hexanol）： n（butyric acid）=1.2, the content of catalyst is 2,32%, the taling water reagent（cyclohexane） is 15mL（when butyric acid is 0.2mol）.The yield of the product is 95.86%. The catalyst could be used for times without any treatments. Experimental result showed that the catalyst had many advantages, such as easy preparation,low cost and high activity. It was also non-corrosive and pollution-free to the environment.