| 同位素示踪研究K2CO3/CH3I促进的碳酸二甲酯直接合成反应 |
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| 引用本文： | 蔡振钦,徐春明,赵锁奇,许志明,孙学文,张民.同位素示踪研究K2CO3/CH3I促进的碳酸二甲酯直接合成反应[J].催化学报,2006,27(7):615-618. |
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| 作者姓名： | 蔡振钦 徐春明 赵锁奇 许志明 孙学文 张民 |
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| 作者单位： | 1. 中国石油大学(北京)重质油国家重点实验室,北京,102249;中国石油化工集团洛阳石油化工工程公司工程研究院,河南洛阳,471003
2. 中国石油大学(北京)重质油国家重点实验室,北京,102249 |
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| 摘 要： | 采用同位素示踪技术,系统地研究了K2CO3/CH3I促进的CO2插入甲醇直接合成碳酸二甲酯(DMC)的反应机理. 结果表明,固体碱碳酸钾催化剂直接参与了DMC的合成过程, DMC分子中的羰基由CO2插入甲醇后形成,两个甲基分别来源于甲醇和碘甲烷. 本文将以往文献中提出的DMC生成机理和二甲醚生成机理结合起来,并对其进行适当补充后,可以很好地解释实验结果.
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| 关 键 词： | 碳酸二甲酯 合成 碳酸钾 碘甲烷 同位素示踪 反应机理 |
| 文章编号： | 0253-9837（2006）07-0615-04 |
| 收稿时间： | 01 5 2006 12:00AM |
| 修稿时间： | 2006-01-05 |
Isotopic Tracer Study on Mechanism of Direct Synthesis of Dimethyl Carbonate Promoted by K2CO3/CH3I |
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| CAI Zhenqin,XU Chunming,ZHAO Suoqi,XU Zhiming,SUN Xuewen,ZHANG Min.Isotopic Tracer Study on Mechanism of Direct Synthesis of Dimethyl Carbonate Promoted by K2CO3/CH3I[J].Chinese Journal of Catalysis,2006,27(7):615-618. |
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| Authors: | CAI Zhenqin XU Chunming ZHAO Suoqi XU Zhiming SUN Xuewen ZHANG Min |
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| Institution: | 1 State Key Laboratory of Heavy Oil processing, China University of Petroleum, Beijing 102249, China ; 2 Engineering Research Institute of Luoyang Petrochemical Engineering Corporation, China Petrochemical Group, Luoyang 471003, Henan, China |
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| Abstract: | Direct synthesis of dimethyl carbonate (DMC) by CO insertion into methanol promoted by K_2CO_3/CH_3I was studied by the isotopic tracer technique. It is confirmed that the base catalyst K_2CO_3 participates in the synthesis process. The carbonyl group of DMC is formed by CO_2 insertion, and the two methyl groups of DMC are from methanol and iodomethane, respectively. the DMC formation and the dimethyl ether formation follows the mechanisms proposed in the literature, and the combination of the former mechanisms can well explain the experimental results. |
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| Keywords: | dimethyl carbonate synthesis potassium carbonate iodomethane isotopic tracing mechanism |
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