文献类型：期刊文献

中文题名：催化加氢法提高乙二醇的紫外透光率

英文题名：Catalytic hydrogenation to improve the ultraviolet light transmittance of ethylene glycol

作者：孙雪莹[1];方云进[2];沈卫华[1];朱志庆[1]

机构：[1]华东理工大学化工学院,上海200237;[2]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2017

卷号：37

期号：2

起止页码：74

中文期刊名：现代化工

外文期刊名：Modern Chemical Industry

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

语种：中文

中文关键词：乙二醇;紫外透光率;酯交换;催化加氢

外文关键词：ethylene glycol; UV transmittance; transesterification; catalytic hydrogenation

摘要：利用自制催化剂研究了催化加氢反应提高酯交换反应合成碳酸二甲酯工艺中副产物乙二醇的紫外透光率(UV值)问题。结果表明,在温度为110℃,催化剂质量为乙二醇质量的3%,氢压为1.0 MPa,反应时间为3.5 h的反应条件下,得到乙二醇在波长为220、275 nm和350 nm的UV值,分别由原来的1.3%、16.1%和92.6%平均提高到76.5%、94.9%和99.8%,质量达到了最新的国标要求。根据加氢反应前后乙二醇的GC-MS分析结果,可以判定影响乙二醇UV值的杂质主要是N,N-二甲基甲酰胺和2-氯乙醇。
The catalytic hydrogenation over self-made catalyst is studied to improve the UV transmittance of ethylene glycol produced by transesterification of ethylene carbonate and methanol. The UV transmittance of ethylene glycol at 220 nm,275nm,350 nm is averagely increased from 1. 3%,16. 1%,92. 6% to 76. 5%,94. 9%,99. 8%,respectively,under the following conditions： 110℃ of temperature,3% of catalyst,1. 0 MPa of H2 pressure and 3. 5 h of reaction time. The quality of ethylene glycol can meet the current GB standard requirements. According to the GC-MS analysis of ethylene glycol before and after the hydrogenation,it proves that the impurities which influence the UV transmittance of ethylene glycol are mainly N,N-dimethylformamide and 2-chloroethanol.