化工进展

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VPO复合物催化环己烷亚硝化一步合成ε-己内酰胺

戚行时1,毛丽秋1,尹笃林1,游奎一2,罗和安2   

  1. 1湖南师范大学精细催化合成研究所,湖南 长沙 410081;2 湘潭大学化工学院,湖南 湘潭 411105
  • 出版日期:2011-02-05 发布日期:2011-02-05

One-step catalytic synthesis of ε-caprolactam from cyclohexane nitrosation catalyzed by transition VPO composites

QI Xingshi1,MAO Liqiu1,YIN Dulin1,YOU Kuiyi2,LUO He’an2   

  1. 1Institute of Fine Catalysis and Synthesis,Hunan Normal University,Changsha 410081,Hunan,China;2College of Chemical Engineering,Xiangtan University,Xiangtan 411105,Hunan,China
  • Online:2011-02-05 Published:2011-02-05

摘要:

采用还原-浸渍法设计和制备了一系列过渡金属掺杂的还原型M1-M2VPOM2=AlMgTi)复合催化剂,应用于环己烷液相亚硝化一步合成ε-己内酰胺的反应。结果表明,己内酰胺可以通过催化环己烷亚硝化一步直接获得。在这些复合催化剂中,还原-浸渍型的Mn-AlVPO催化剂具有较佳的催化性能:环己烷的转化率为17.1%,目标产物己内酰胺的选择性高达75.6%。并对反应机理进行了初步探讨。

Abstract:

A series of transition metal-doped M1-M2 vanadium phosphorus oxideVPO)(M1 = MnM2=AlMgTicomposite catalysts were prepared by the reduction-dipping methodand were employed to catalyze reaction of cyclohexane with nitrosyl sulfuric acid in the presence of fuming sulfuric acid. ε-caprolactam was directly obtained from such one-step catalytic process. Among themthe Mn-Al-VPO gave the best results with 17.1% of conversion and 75.6% of selectivity to ε-caprolactam. A possible mechanism is proposed.

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