Study on Green Catalytic Synthesis of Dicyclohexyl Phthalate

The synthesis of dicyclohexyl phthalate catalyzed by ferric tri-dodecanesulfonate was studied in this article.The effects of catalyst amount,molar ratio of cyclohexanol to phthalic anhydride,reaction time,catalyst reused times,and water-carrying agent amount on the yield of dicyclohexyl phthalate were investigated.The experiment results showed that ferric tri-dodecanesulfonate had a lot of merits,such as high catalytical activity,little amount,high esterification yield,low pollution,low cost,good reusability and so on.The optimum reaction conditions were obtained as follows:phthalic anhydride amount of 0.1 mol,cyclohexanol amount of 0.28 mol,catalyst amount of 2.5 g,reaction time of 3.0 h,water-carrying agent amount of 15 mL.Under above conditions,the yield of dicyclohexyl phthalate could be up to 93.6%.