二氧化碳和正丁胺一步合成N,N’-二丁基脲  

Synthesis of N,N'-dibutylurea from carbon dioxide and butylamine

作　　者：方涛[1] 罗珊珊[1] 廖崇静[1] 范国枝[1] 

机构地区：[1]武汉轻工大学化学与环境工程学院,湖北武汉430023

出　　处：《武汉轻工大学学报》2015年第1期42-46,共5页Journal of Wuhan Polytechnic University

基　　金：湖北省教育厅科学技术研究计划重点项目(D20141704)

摘　　要：研究了二氧化碳(CO2)和正丁胺一步合成N,N’-二丁基脲(DBU)。采用气相色谱(GC)和气质联用仪(GC-MS)对产物分别进行了定量分析和定性分析,并运用红外光谱(IR)、质谱(MS)和核磁共振氢谱(1H-NMR)对产物结构进行了表征。考察了催化剂、溶剂、反应时间、反应温度和压力的影响。当采用乙腈作溶剂,催化剂氢氧化铯与正丁胺摩尔比为0.1时,170℃和8 MPa下反应10 h,DBU的产率和选择性分别为91.8%和98.0%。The synthesis of N,N＇-dibutylurea（ DBU） from carbon dioxide（ CO2） and butylamine was studied.The yield of DBU was quantitatively determined by gas chromatograph（ GC） and the products in the reaction mixture were identified by gas chromatograph mass spectrometer（ GC-MS）,respectively. The objective product was further characterized by infrared spectroscopy（ IR）,mass spectrometer（ MS） and1hydrogen-nuclear magnetic resonance（1H-NMR）. The effect of catalyst,solvent,reaction time,reaction temperature and pressure on the synthesis of DBU was also investigated. 91. 8% yield and 98. 0% selectivity to DBU was obtained at 170 ℃ and 8MPa for 10 h with 0. 1： 1 molar ratio of caesium hydroxide to butylamine using acetonitrile as solvent.

关 键 词：正丁胺 CO2 氢氧化铯 N N’-二丁基脲 

分 类 号：TQ032[化学工程]