铅、锌化合物催化尿素与1,2-丙二醇制备碳酸丙烯酯  

Synthesis of Propylene Carbonate from Urea and 1,2-Propylene Glycol Catalyzed by Lead and Zinc Compounds

作　　者：赵艳敏[1] 陈彤[1] 雷永诚[1] 王公应[1] 姚洁[1] 王越[1] 

机构地区：[1]中国科学院成都有机化学研究所

出　　处：《精细化工》2005年第8期638-640,共3页Fine Chemicals

摘　　要：以铅、锌的化合物为催化剂,进行尿素与1,2-丙二醇合成碳酸丙烯酯的反应,所用的铅、锌化合物催化剂均有活性,其中碳酸铅的催化活性最高。以碳酸铅为催化剂,在催化剂用量为反应物总质量的3%,n(1,2-丙二醇)/n(尿素)=3,反应温度160℃,反应时间6 h的条件下,碳酸丙烯酯的收率为98.2%。反应为多相催化体系,简单过滤即可实现催化剂与产物的分离。已完成5 L的扩试,碳酸丙烯酯收率为96%。lead compounds and zinc compounds are active catalysts for the reaction of urea and 1,2-propylene glycol, especially lead carbonate which shows very excellent catalytic activity. Thus, using 3% PbCO3 as catalyst, with n（1,2-propylene glyeol）/n（urea） =3,reacting at 160℃ for 6h, yield of propylene carbonate is 98. 2%. Tne catalytic system is heterogeneous. It is easy to separate the catalyst and the product by simple filtration. Tne 5 L industrial experiment had been finished and the yield of propylene carbonate was 96%.

关 键 词：尿素醇解 碳酸丙烯酯 碳酸铅催化剂 

分 类 号：TQ225.52[化学工程—有机化工]