纳米复合杂多酸催化合成己酸乙酯的研究

Study on Catalytic Synthesis of Ethyl Caproate by Nanometer Complex Heteropoly Acid

以纳米型H3PW12O40/SiO2为催化剂,己酸和无水乙醇为原料,合成曲酒香料己酸乙酯,实验结果表明,纳米复合磷钨杂多酸是合成己酸乙酯的良好催化剂,适宜的工艺条件为:酸醇物质的量比为11∶.8,催化剂用量5%,带水剂甲苯为5mL,反应时间2h,酯化率可达97.1%。

Synthesis of ethyl caproate from hexanoic acid and ethyl alcohol with nanometer H3PW12O40 / SiO2 as catalyst was studied. The results showed that nanometer H3PW12O40/SiO2 was a good catalyst for synthesis of ethyl caproate. The optimal conditions were summed up as follows： molar ratio of hexanoic acid to ethyl alcohol was 1：1.8, the use level of catalyst was 5 %, the water-carrying toluene was 5 mL, reaction time was 2 h, and the yield was about 97.1%.