物理化学学报 >> 2005, Vol. 21 >> Issue (06): 653-657.doi: 10.3866/PKU.WHXB20050615

研究论文 上一篇    下一篇

环氧丙烷和甲醇在MgO上合成1-甲氧基-2-丙醇反应机理

张文郁; 董庆年; 赵宁; 魏伟; 孙予罕   

  1. 中国科学院山西煤炭化学研究所, 太原 030001； 中国科学院研究生院, 北京 100049
  • 收稿日期:2004-12-20 修回日期:2005-01-25 发布日期:2005-06-15
  • 通讯作者: 孙予罕 E-mail:yhsun@sxicc.ac.cn

The Reaction Mechanism for the Synthesis of 1-methoxy-2-propanol on MgO Catalyst

ZHANG Wen-yu; DONG Qing-nian; ZHAO Ning; WEI Wei; SUN Yu-han   

  1. State Key Laboratory of Coal Conversion, Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001; Graduate School of the Chinese Academy of Sciences, Beijing 100049
  • Received:2004-12-20 Revised:2005-01-25 Published:2005-06-15
  • Contact: SUN Yu-han E-mail:yhsun@sxicc.ac.cn

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摘要： 应用原位FT-IR详细研究了MgO上甲醇对环氧丙烷的加成反应. 结果表明在MgO催化剂上甲醇很易解离吸附形成甲氧基, 根据负碳离子机理, 吸附环氧丙烷可形成类丙烯物种. 甲氧基对类丙烯物种的加成反应遵循反-Markownikov法则, 高选择性地合成1-甲氧基-2-丙醇.

关键词: 甲醇, 环氧丙烷, IR, 1-甲氧基-2-丙醇, MgO

Abstract: The addition of propylene oxide with methanol was carried out over MgO and a detailed mechanism of the reaction was investigated by using FT-IR method. In-situ FT-IR revealed that methanol dissociation into methoxide and proton took place readily on MgO, and propylene oxide adsorbed on MgO could generate propylenelike species via carbanion intermediate. As a result, methanol dissociated into adsorbed methoxide and reacted with the propylenelike species in antiMarkownikov fashion, which led to the high selectivity to 1-methoxy-2-propanol on MgO.

Key words: Methanol, Poropylene oxide, IR, 1-methoxy-2-propanol, MgO