Montmorillonite Supported Heteropoly Acid for Catalytic Synthesis of Tri-butyl Citrate

A supported heteropoly acid for catalytic reacted with normal butanol can synthesize tri-butyl citrate.The effects of reaction conditions,such as the quantity of catalysy,the ratio of reactants,reaction temperature,reaction time and etc are discussed The optimal reaction conditions are as follows: molar ratio of acid/ carbinol is 1:5,the content of catalyst is 3wt% of citric acid,reaction time is 3h,reaction temperature is 117℃-123℃.And when the esterification rate reaches 94.7%,catelyst can be used repeatedly.