尿素催化醇解合成长碳链脂肪族碳酸二酯  

Synthesis of Long Chain Aliphatic Carbonic Esters by Catalytic Alcoholysis of Urea

作　　者：王臣[1] 王越[1] 姚洁[1] 王公应[1] 薛援 李石新 

机构地区：[1]中国科学院成都有机化学研究所,成都610041 [2]中国石油乌鲁木齐石化分公司

出　　处：《应用化学》2003年第9期879-882,共4页Chinese Journal of Applied Chemistry

摘　　要：考察了以不同金属氧化物为催化剂对尿素醇解合成长碳链脂肪族碳酸二酯的催化活性 ,发现氧化锌具有较高的催化活性。确定出尿素与异戊醇醇解反应较适宜的反应条件为 :异戊醇与尿素的摩尔比为3.3∶1,催化剂氧化锌为体系总质量的 0 85 % ,反应时间 8h ,加热温度 16 0～ 2 0 0℃ ,在上述条件下 ,碳酸二异戊酯的产率可达 5 8 3%～ 76 3%。尿素醇解反应的收率和适宜的反应条件与所用的醇的结构有密切的关系。Some metal oxides, organic and inorganic salts were studied as catalyst for synthesis of aliphatic carbonic ester by alcoholysis of urea. It is found that ZnO has higher catalytic activity in the catalysts tested with diisoamyl carbonate yield 58.3%～76.3%, when reaction is carried out at 160～200 ℃ for 8 h, the molar ratio of isoamyl alcohol to urea and mass fraction of catalyst are 3.3 and 0.85% respectively.

关 键 词：尿素 醇解 碳酸二酯 氧化锌 

分 类 号：O643.22[理学—物理化学]