应用化学

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乙酰丙酮钌催化硝基苯氢转移氢化制苯胺

王巍,刘晶晶,张龙*   

  1. (长春工业大学化学工程学院, 吉林省石化资源与生物质综合利用工程实验室 长春 130012)
  • 收稿日期:2012-08-27 修回日期:2012-10-08 出版日期:2013-04-10 发布日期:2013-04-10
  • 通讯作者: 张龙, 教授; Tel/Fax:0431-85716785; E-mail:zhanglongzhl@163.com; 研究方向:精细有机合成
  • 作者简介:王巍 (1987- ) 长春工业大学化学工程学院 吉林省石化资源与生物质综合利用工程实验室 在读研究生

Hydrogenation of Nitrobenzene to Aniline via a Hydrogen Transfer Process Catalyzed by Tris(acetylacetonato)ruthenium(Ⅲ)

WANG Wei, LIU Jingjing, ZHANG Long*   

  1. (Jilin Provincial Engineering Laboratory for Complex Uitlization of Biomass and Petroresources,
    School of Chemical Engineering,Changchun University of Technology,Changchun 130012,China)
  • Received:2012-08-27 Revised:2012-10-08 Published:2013-04-10 Online:2013-04-10
  • About author:王巍 (1987- )长春工业大学化学工程学院 吉林省石化资源与生物质综合利用工程实验室 在读硕士研究生。

摘要: 以自制的乙酰丙酮钌配合物(Ru(acac)3)为催化剂,甲酸钠为氢供体,十六烷基三甲基溴化铵为乳化剂,研究了水溶液中催化硝基苯氢转移氢化制苯胺的工艺。 确定了适宜反应条件为:甲酸钠和硝基苯摩尔比为2∶1,反应温度80 ℃,反应时间4.0 h,Ru(acac)3用量为硝基苯质量的4%。 硝基苯的转化率和苯胺产率分别为100%和96.65%,表明Ru(acac)3对硝基苯氢转移氢化制苯胺具有优异的催化作用。

关键词: 乙酰丙酮钌, 氢转移, 硝基苯, 苯胺

Abstract: Using home-made tris(acetylacetonato)ruthenium(Ⅲ), Ru(acac)3, as catalyst, the hydrogenation of nitrobenzene to aniline via a hydrogen transfer process using sodium formate as hydrogen donor was investigated. The effects of reaction conditions such as temperature, time, dosage of catalyst and categories of hydrogen donor were investigated. The optimized reaction conditions are: the reaction temperature is 80 ℃, the reaction time is 4 h and the molar ratio of sodium formate to nitrobenzene is 2∶1. Under optimized conditions, the conversion of nitrobenzene is nearly 100% with 96.65% yield of aniline. This result shows that Ru(acac)3 exhibits good catalytic activities in the hydrogenation of nitrobenzene.

Key words: tris(acetylacetonato)ruthenium(Ⅲ), catalytic transfer hydrogention, nitrobenzene, aniline

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