Catalytic Synthesis of Glyceryl Triacetate With H_2SO_4-K_2Cr_2O_7 Modified Activated Carbon

Glyceryl triacetate was synthesized from glacial acetic acid and glycerol by using H2SO4-K2Cr2O7 modified activated carbon as catalyst.The best synthesis condition of glycerol triacetate was investigated.The experiment results show that the optimum reaction conditions are as follows: molar ratio of glacial acetic acid to glycerol is 1:5.5,dosage of H2SO4-K2Cr2O7 modified activated carbon as catalyst is 2.5%,reaction temperature is 130 ℃,reaction time is 2 h,dosage of toluene as water-carrying agent is 20 mL.Under above conditions,esterification yield can reach to 91.5%,and the catalyst can be reused.