Catalytic Synthesis of Ethylene Glycol Monopelargonate by Heterogeneous Supported Heteropoly Acid TiSiW_(12)O_(40)-Al_4(SiW_(12)O_(40))_3/TiO_2-Al_2O_3

The synthesis of ethylene glycol monopelargonate with pelargonic acid and ethylene glycol as reactants and using TiSiW12O40-Al4(SiW12O40)3/TiO2-Al2O3 as a catalyst was studied.The factors influencing its catalytic performance were investigated and optimized,including molar ratios of pelargonic acid to ethylene glycol,the amount of catalyst,reaction time,and reaction temperature.The optimum reaction conditions were as follows: The molar ratio of pelargonic acid to ethylene glycol was 1:3.The mass ratio of catalyst to reactants was 4%.The reaction time was 3.5 h.The reaction temperature was 90 ℃.Moreover,the rate of esterification was up to 94.6%.The structure of ethylene glycol monopelargonate was characterized by IR spectrum.The catalyst was prepared easily and had high catalytic activity and could be recycled and used for many times.