纳米型H_3PW_(12)O_(40)/SiO_2催化合成人造康乃克油

Catalytic Synthesis of Ethyl Heptanoate by Nanometer Complex Heteropoly Acid

以纳米型H3PW12O40/SiO2为催化剂,庚酸和无水乙醇为原料,合成酒用香料人造康乃克油。结果表明,纳米复合磷钨杂多酸是合成人造康乃克油的良好催化剂,适宜的工艺条件为:酸醇物质的量比为1∶1.7,催化剂用量为5%,带水剂甲苯为8mL,反应时间为2h,此时酯化率可达96.8%。

The synthesis of ethyl heptanoate from heptanoic acid and ethyl alcohol with nanometer H3PW12O40/SiO2 as catalyst was studied and the results showed that nanometcr H3PW12O40/SiO2 was an ideal catalyst for the synthesis of ethyl heptanoate. The optimum technical conditions were summed up as follows： molar ratio ofheptanoic acid to ethyl alcohol was 1：1.7, the use level of catalyst was 5 % ,the use level of water-carring toluene was 8 mL, the reaction time was 2 h ,and the yield was about 96.8 %.