Preparation method of dimethyl carbonate

The invention provides a method for preparing dimethyl carbonate from carbon dioxide, which adopts a homogeneous catalyst to catalyze carbon dioxide and 2, 2-dimethoxypropane to react under mild conditions to directly generate dimethyl carbonate. The method is mild in condition, short in reaction time and higher in safety; the selectivity of the reaction can reach 98% or above, and the total yield can reach 99% at most. 本发明提供一种由二氧化碳制备碳酸二甲酯的方法，采用均相催化剂催化二氧化碳和2,2-二甲氧基丙烷在温和条件下发生反应直接生成碳酸二甲酯。本发明条件温和，反应时间短，安全性更高；反应的选择性可以达到98%以上，总收率最高可达99%。