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Improved Regioselective Mononitration of o-Xylene over HBEA-500 Zeolite Catalyst
Improved Regioselective Mononitration of o-Xylene over HBEA-500 Zeolite Catalyst
Bulletin of the Korean Chemical Society. 2013. Nov, 34(11): 3485-3487
Copyright © 2013, Korea Chemical Society
  • Received : July 08, 2013
  • Accepted : August 14, 2013
  • Published : November 20, 2013
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About the Authors
Chun J. Shi
Institute of Chemical Application Technology Development, Bengbu College, Bengbu 233000, P.R. China
Yan F. Tai
Institute of Chemical Application Technology Development, Bengbu College, Bengbu 233000, P.R. China
Hong T. Liu
School of Chemical Engineering, Hefei University of Technology, Hefei 230009, P.R. China

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Experimental
Quantities are recorded in the footnotes to the appropriate tables. All reactions were carried out in a 50 mL two-necked round bottomed flask equipped with a water condenser and a magnetic stirrer. In a typical experiment, a mixture of zeolite HBEA-25 (Si/Al = 25, 0.11g), o -xylene (0.60 mL, 5 mmol ), nitric acid ( 65%, 0.68 mL, 10 mmol ) in acetic anhydride (5.0 mL) at room temperature for 10 h. When the reaction was over, the zeolite was removed by filtration and the filter liquor was washed with NaHCO 3 (3 × 10 mL) and water (3 × 10 mL). The organic phase separated was dried with anhydrous sodium sulfate, and filtrated to give a straw yellow liquid residue. The isomer distribution and yields of products were estimated from the peak areas based on the internal standard technique using gas chromatography. The straw yellow products with further purification by column chromatography, and were identified by comparison of their analytical data with those of authentic samples.
Acknowledgements
The publication cost of this paper was supported by the Korean Chemical Society.
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