氧化镁催化剂上催化氨基甲酸丁酯合成碳酸二丁酯的研究  

Synthesis of dibutyl carbonate from butyl carbamate catalyzed by MgO

作　　者：宋春雨 王磊 何桅 李小庆 揭芳芳 马昱博 SONG Chun-yu;WANG Lei;WEI He;LI Xiao-qing;JIE Fang-fang;MA Yu-bo(School of Chemical Engineering,Chongqing Chemical Industry Vocational College,Chongqing 401220,China;Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]重庆化工职业学院,化学工程学院,重庆401220 [2]中国科学院兰州化学物理研究所,甘肃兰州730000

出　　处：《天然气化工—C1化学与化工》2019年第5期17-22,共6页Natural Gas Chemical Industry

基　　金：重庆化工职业学院（HZY2018-KJHX01）;国家自然基金（21808192）

摘　　要：以一系列金属氧化物为催化剂,在90mL反应釜中系统研究了以氨基甲酸丁酯为原料合成碳酸二丁酯的催化性能及其影响因素。结果表明,氧化镁对碳酸二丁酯合成具有最高的催化活性;在0.3g氧化镁催化剂、丁醇/氨基甲酸丁酯物质的量比为6.5、220℃、12h的反应条件下,可获得99%以上的氨基甲酸丁酯转化率和99%以上的碳酸二丁酯选择性。2L反应釜放大实验表明,本反应放大效应不明显,依然可获得99%以上的氨基甲酸丁酯转化率和99%以上的碳酸二丁酯选择性;催化剂重复试验表明:催化剂重复使用10次,氨基甲酸丁酯的转化率和碳酸二丁酯的选择性几乎不变,催化剂足够稳定。A series of metal oxides were used as catalyst to synthesizing dibutyl carbonate from butyl carbamate in a 90 mL autoclave, and the effects of different factors on the reaction were investigated. Among the catalysts, MgO showed the highest catalytic activity, and more than 99% conversion of butyl carbamate and 99% selectivity of dibutyl carbonate were obtained under the conditions of reacrion temperature of 220℃, reaction time of 12 h, MgO catalyst of 0.3 g and butanol/butyl carbamate molar ratio of 6.5. Similar high conversion and selectivity were still obtained in 2 L autoclave. MgO catalyst also showed good stability, and the conversion of butyl carbamate and the selectivity of dibutyl carbonate remained almost unchanged after repeated use for 10 times.

关 键 词：氨基甲酸丁酯 碳酸二丁酯 催化合成 醇解 氧化镁 

分 类 号：O623.662[理学—有机化学] O643.3[理学—化学]