N,N'-二乙基硫脲的制备及性质  

Preparation of N,N'-diethylthiourea and its properties

作　　者：罗国荣[1,2] 冯世宏[1] 张怀敏 张震斌[1] 吴红梅[1] 郭宇[1] 

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121004 [2]濮阳市联众兴业化工有限公司,河南濮阳457000

出　　处：《工业催化》2017年第6期67-69,共3页Industrial Catalysis

基　　金：国家自然科学基金(21103076)资助项目

摘　　要：以十六烷基三甲基溴化铵为催化剂,乙胺和二硫化碳反应制备N,N'-二乙基硫脲,收率达94.6%,与传统工艺相比,综合效益明显提高。通过FT-IR、XRD和TG-DTA对N,N'-二乙基硫脲进行表征,揭示N,N'-二乙基硫脲的微观结构和内在规律性。FT-IR揭示N,N'-二乙基硫脲分子内部各元素之间的化学键键型,N,N'-二乙基硫脲为脂肪仲胺。XRD从晶胞参数和晶面指数等晶体学数据,完成N,N'-二乙基硫脲物相组成和结构的定性鉴定。TG-DTA检测N,N'-二乙基硫脲的质量变化与热效应,TG-DTA结果表明,85.3℃和261.5℃存在两个吸收峰,分别为N,N'-二乙基硫脲的相变峰和分解峰,N,N'-二乙基硫脲分解温度偏高。N, N＇ -diethylthiourea （DETU） was synthesized from ethylamine and carbon disulfide using hexadecyl trimethyl ammonium bromide as the catalyst, with yield of 94.6%. The as -synthesized DETU was characterized by FT -IR, XRD and TG -DTA to reveal its micro -structure and intrinsic regularity. FT - IR results revealed types of chemical bonds in DETU molecule and that DETU was an aliphatic see- ondary amine. XRD results determined phase composition and structure of DETU by crystallographic data such as cell parameters and crystal face index. TG - DTA results showed that there were two absorption peak at 85. 3 ℃ and 261. 5 ℃, corresponding to phase transition and decomposition of DETU, respectively. The decomposition temperature of DETU was excessively high.

关 键 词：精细化学工程 N N’-二乙基硫脲 十六烷基三甲基溴化铵 

分 类 号：O621.3[理学—有机化学] O643.36[理学—化学]