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Citation: QIAN Hua, YE Zhi-Wen, LIU Da-Bin. Selective Nitration of Chlorobenzene with N₂O₅ Assisted by Supported Heteropoly Acids[J]. Chinese Journal of Applied Chemistry, ;2009, 26(6): 676-680. shu

Selective Nitration of Chlorobenzene with N₂O₅ Assisted by Supported Heteropoly Acids

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

Corresponding author: QIAN Hua,
Received Date: 4 May 2008
Available Online: 20 July 2008
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)

Chlorobenzene nitration was carried out with supported heteropoly acids as catalysts and N₂O₅ as nitrating agent.Many factors were investigated,such as kinds of heteropoly acids and carriers,loading of heteropoly acid,number of catalyst used,and so on.Results showed the nitration of chlorobenzene with N₂O₅ is an acid catalyzed reaction,and the supported heteropoly acids can highly enhance the nitration ability of N₂O₅;the catalyst can be directly reused after recycle,and its activity was not obviously decreased.Under the optimum conditions,the yield of the nitration was 26%,and the para-selectivity was up to 68.8%,which indicates that N₂O₅ is a prospective nitration agent,and it can replace the concentrated mineral acid as the catalyst which is one of the most environmentally harmful processes,and meets the requirement of green environmental protection.
- heteropoly acid,
- dinitrogen pentoxide,
- chlorobenzene,
- nitration
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Selective Nitration of Chlorobenzene with N₂O₅ Assisted by Supported Heteropoly Acids