2008•Chemistry & BioengineeringRequires access
Synthesis of Diethylene Glycol Dibenzoate
Wang Qiang
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Abstract
Through the two series of orthogonal tests,it is respectively discussed of using sulfuric acid or p-toluene sulfonic acid as catalyst to synthesize diethylene glycol dibenzoate.The result shows that the selectivity of catalyst of p-toluene sulfonic acid is satisfactory.The optimum reaction conditions are as follows: the dosage of p-toluene sulfonic acid is 3%,the reaction temperature is 185℃,the molar ratio of benzoic acid to diethylene glycol is 2∶1,the reaction time is 10 h.Under above conditions,the yield can reach 98.00%.