Amberlyst-15催化合成三醋酸甘油酯工艺条件研究

Catalytic synthesis of glycerol triacetate with Amberlyst-15

以甘油、醋酸酐为原料,强酸性阳离子交换树脂Amberlyst-15为催化剂,催化合成三醋酸甘油酯。考察了不同的醋酸酐用量、反应温度、反应时间等因素对反应的影响。发现酸酐的用量对三醋酸甘油酯的收率有显著影响,优化的反应条件是:n(甘油)∶n(醋酸酐)=1∶3,反应温度为60℃,反应时间为4 h。在优化的反应条件下,三醋酸甘油酯的收率可达到84.2%。并且发现Amberlyst-15可以重复使用多次。

Strong-acid cation exchange resin Amberlyst-15 used as catalyst,glycerol triacetate was synthesized from acetic anhydride and glycerol.The reaction conditions of the reaction were investigated.And the optimum conditions of molar ratio of glycerol to acetic anhydride,esterification time and reaction temperature is 1∶3,4 h and 60 ℃,respectively.The results show that the yield is 84.2%.The catalysts can be recycled and reused while the catalytic activity is not reduced obviously.