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Citation: QIAN De-Sheng, CHENG Guang-Bin, LV Chun-Xu. Rare-earth Metals Catalyzed Nitration of Toluene in Ionic Liquid[J]. Chinese Journal of Applied Chemistry, ;2009, 26(7): 757-761. shu

Rare-earth Metals Catalyzed Nitration of Toluene in Ionic Liquid

1.
a Department of Chemistry and Materials Science, Chaohu College, Chaohu 238000;
2.
b School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094

Corresponding author: QIAN De-Sheng,
Received Date: 18 July 2008
Available Online: 25 September 2008

Composites of rare-earth metal complexes supported on caprolactam-cation-based Bronsted acid ionic liquids(IL) were prepared,and used as solvents and catalysts in the nitration of toluene by equiv mole of 67% nitric acid.The structure of the ionic liquid was characterized by ¹H NMR.The effects of reaction temperature,reaction time and the type and amount of catalyst on product yield and para-selectivity for the nitration of toluene were investigated.Nitrotoluene with a yield of 46.5% and an ortho-para isomer ratio of 1.1 was obtained under the optimal conditions.In addition,the mixture of IL and rare-earth complexes could be removed easily and recycled 4 times with the same ortho-para selectivity and only a small decrease in the yield,suggesting a possibility of a more economic and green process.
- toluene,
- ionic liquid,
- rare earth metal,
- nitration
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