Preparation of Dimethyl Carbonate from Dimethyl Oxalate Catalyzed by Sodium Methanol
Dimethyl carbonate was prepared by one step method using dimethyl oxalate as raw material and sodium methanol as catalyst.The effects of catalyst dosage,reaction time and reaction temperature on the effect of decarbonylation were investigated.The results show that when the catalyst content is 4％(mass ratio),the reaction time is 4 h,and the reaction temperature is 110～120 ℃,the decarbonylation effect is the best.In this case,the conversion of dimethyl oxalate and the selectivity of dimethyl carbonate can reach more than 99％.Through orthogonal analysis,it is proved that reaction temperature is the most important factor affecting the decarbonylation reaction.Decarbonylation of dimethyl carbonate by sodium methanol is a feasible route for the synthesis of dimethyl carbonate with simple steps,mild conditions and high yield.
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