Study on the Catalytic Synthesis of Dibutyl Sebacate with Cupric Sulfate

The synthesis of dibutyl sebacate by esterification with cupric sulfate as catalyst is studied. The optimal conditions are as follows :0.05mol sebacic acid, quantity of catalyst used 3.0g, molar ratio of alcohol to acid 4, reaction time 3h and 12mL benzene used as water carrier. The esterification yield for sebacic acid reaches 97.23%. Experimental results show that, cupric sulfate is a high active catalyst with high rate of esterification, less quantity used and lower production cost. It can be used repeatedly and has no environmental pollution.