摘要
碳酸二甲酯(DMC)是一种环保型化工原料。以聚乙二醇型过渡金属双子离子液体PEG_(1000)-DAIL[Zn Cl3]为催化剂,催化尿素醇解合成碳酸二甲酯。该催化剂具有良好的催化性能,在反应温度为160℃,反应时间为4 h,离子液体与尿素摩尔比为2︰10,尿素与甲醇摩尔比为1︰20时,DMC的收率达到48%。离子液体PEG1000-DAIL[Zn Cl3]经过真空干燥除水后,重复使用五次,其催化性能没有明显的变化,可以保持稳定的DMC的收率。
Dimethyl carbonate （DMC） is a kind of environmental friendly chemical material. In this paper, alcoholysis of urea to DMC catalyzed by PEG 1000-based dicationic ionic liquid based on transition metal PEG1000-DAIL[ZnCl3] has been described. The results indicated that the catalytic system presented the highest catalytic activity in the case of 160℃, 4 h, 2/10 mass ratio of ionic liqiud/urea and 1/20 mass ratio of urea/methanol, the yield of DMC reached 48 %. The ionic liquid PEG1000-DAIL[ZnCl3] can be recycled for five times without obviously decreasing the catalytic activity after vacuum drying dehydration and the stability of the yield of DMC can be maintained.
作者
王雯
刘小兵
Wang Wen Liu Xiaobing(school of Chemistry and Chemical Engineering, Jinggangshan University, Ji＇an 343009, Chin)
出处
《广东化工》
CAS
2017年第19期6-7,5,共3页
Guangdong Chemical Industry
基金
井冈山大学博士科研启动基金(JZB1322)
关键词
碳酸二甲酯
离子液体
尿素
催化
dimetbyl carbonate
ionic liquid
urea
catalysis
