Catalytic Synthesis of Wine-use Flavouring Butyl Hexanoate

In the experiments, solid acid Ti(SO4)2/SiO2 was used as catalyst and caproic acid and n-butanol were used as raw materials to synthesize butyl hexanoate(wine-use flavouring). The effects of the use level of catalyst, molar ratio of alcohol to acid, and reaction time on the esterification rate were investigated, and the best catalytic reaction conditions of solid acid Ti(SO4)2/SiO2 for butyl hexanoate were summer up as follows:n(n-butanol): n(caproic acid) = 3∶1, reaction time was 1.5 h, and the use level of catalyst was 0.30 g(counted by 0.05 mol caproic acid). Under those conditions, the esterification rate could reach up to 97.17 %, and the catalyst had good performance for repeated use.