主要阐述了尿素两步法合成碳酸二甲酯和传统的合成工艺的优缺点,同时阐述了尿素两步法合成碳酸二甲酯的工艺以及催化剂的制备过程。通过实验研究合成碳酸二甲酯两步中可使用同种催化剂,其催化剂可是单一的一种金属氧化物或金属盐,也可是两种或两种以上的复合型催化剂,或者是两种或两种以上的固载型催化剂,其催化性能都较高,碳酸丙烯酯都能达到较高的收率。 The advantages and disadvantages of the two-step synthesis of dimethyl carbonate and the traditional synthesis process are mainly described. Meanwhile, the synthesis process of dimethyl carbonate by urea two-step method and the preparation process of the catalyst are also described. Through the experimental study of the synthesis of dimethyl carbonate can be used in two steps of the same catalyst, the catalyst can be a single kind of metal oxide or metal salt, but also two or more composite catalyst, or two or two Species above the immobilized catalyst, the catalytic performance is higher, propylene carbonate can achieve higher yields.