金属碳酸盐催化尿素和1,2-丙二醇合成碳酸丙烯酯  

Synthesis of Propylene Carbonate from Urea and 1,2-Propylene Glycol over Metal Carbonates

作　　者：张碧蓉[1] 吴东方[1] 周建成[1] 

机构地区：[1]东南大学化学化工学院,南京211189

出　　处：《精细石油化工进展》2009年第7期11-14,共4页Advances in Fine Petrochemicals

基　　金：教育部新世纪优秀人才支持计划(NCET-07-0185)资助项目

摘　　要：研究了多种单组分金属碳酸盐和铅锌混合碳酸盐对尿素和1,2-丙二醇合成碳酸丙烯酯反应的催化性能。结果表明,单组分盐中碳酸铅催化活性最高,其次是碳酸锌;而混合盐中Ph/Zn摩尔比为3:1时催化活性最高。通过正交实验优化了反应条件,在反应温度160℃,反应时间2 h,尿素与1,2-丙二醇摩尔比1:5,催化剂用量1.8%的条件下,碳酸丙烯酯的收率可达98.90%。Catalytic activities of a series of metal carbonates and mixed carbonates in the synthesis of propylene carbonate （ PC ） from urea and 1,2 - propylene glycol were investigated. It showed that among single-component carbonates, lead carbonate gave the highest catalytic performance, followed by zinc carbonate, and that among mixed carbonates the catalyst with molar ratio of Pb to Zn 3：1 led to the most excellent catalytic activity. Furthermore, it was concluded from optimization experiments that the optimal reaction conditions were as follows：the reflux time 2 hours, the molar ratio of 1,2 -propylene glycol to urea 5.0： 1, the dosage of the catalyst 1.8% and the reflux temperature 160 ℃, resulting in a PC yield of 98.90%.

关 键 词：尿素醇解 碳酸丙烯酯 金属碳酸盐 正交实验 

分 类 号：TQ225.52[化学工程—有机化工]