Catalytic Synthesis of Ethyl Heptanoate by Complex Heteropoly Acid

The synthesis of ethyl heptanoate from heptanoic acid and ethyl alcohol with H4SiW12O40/SiO2 as catalyst was studied and the results showed that H4SiW12O40/SiO2 was an ideal catalyst for the synthesis of ethyl heptanoate.The optimum technical conditions were summed up as follows:molarratio of heptanoic acid to ethylalcohol was 1∶2,the use level of catalyst was 3%,the use level of water-car-ring to luene was 8mL,the reaction time was 2.5h,and the yield was about 49.5%.