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Citation: YE Zhi-Wen, QIAN Hua, LÜ Chun-Xu. Supported Heteropolyacids Assisted Selective Nitration of Toluene with N₂O₅[J]. Chinese Journal of Applied Chemistry, ;2008, 25(2): 185-188. shu

Supported Heteropolyacids Assisted Selective Nitration of Toluene with N₂O₅

1.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094

Corresponding author: YE Zhi-Wen,
Received Date: 5 February 2007
Available Online: 20 July 2007
Fund Project: 国防科工委"十五"预研项目(40406020103) (40406020103)兵器科技预先研究项目(zy020103-1) (zy020103-1)

Toluene nitration was carried out with supported heteropolyacids as catalysts and N₂O₅ as nitrating agent.Many factors were investigated,including the type of heteropolyacid and carrier,loading of heteropolyacid,and recycle times of the catalyst.Results shows that the nitration with N₂O₅ is an acid catalyzed reaction,and the supported heteropolyacids can highly enhance the nitration ability of N₂O₅;the catalysts can be directly reused after recycle,and their activity is not obviously decreased.Under the optimum conditions,the yield of nitration was 34%,and the para-selectivity was up to 58.9%,which indicated that N₂O₅ is a prospective nitration agent,and the process meets the environmental protection requirements.
- heteropolyacid,
- dinitrogen pentoxide,
- toluene,
- nitration
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Supported Heteropolyacids Assisted Selective Nitration of Toluene with N2O5

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Supported Heteropolyacids Assisted Selective Nitration of Toluene with N₂O₅