利用高压釜式反应器探究尿素与甲醇合成碳酸二甲酯，并提出制备Zn-Ce复合氧化物为该反应的催化剂。并探究一步反应和分步反应对尿素醇解法合成碳酸二甲酯的影响；对一步反应的反应条件进行了优化，得到最佳工艺条件为：反应温度为170℃、反应时间为300 min、尿素与甲醇摩尔比为1：25、催化剂质量为1.5 g、CO₂充压为1 MPa。XRD分析结果表明，该Zn-Ce复合氧化物具有较高结晶度；BET数据分析显示，该Zn-Ce复合氧化物为尿素与甲醇分子提供良好的反应场所。

Dimethyl carbonate is synthesized from urea and methanol in an autoclaving reactor,and Zn-Ce composite oxides is subsequently prepared by precipitation method and used as a catalyst for this synthesis process.The effects of one-step reaction and two-step reaction on the synthesis of dimethyl carbonate through urea alcohololysis are studied.The reaction conditions for one-step reaction are optimized as follows:reaction temperature maintains at 170℃,reaction lasts for 300 min,n(urea):n(methanol)=1:25,catalyst dosage is 1.5 g,and reaction pressure is 1 MPa.Analysis by XRD indicates that Zn-Ce composite oxides exhibit a high crystallinity.BET analysis shows that Zn-Ce composite oxides provide a good reaction place for urea and methanol molecules.

尹爽(1995-),女,硕士研究生,研究方向为工业催化,517468551@qq.com