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Chemcial Industry and Engineering 2015, Vol. 32 Issue (6) :26-30    DOI: 10.13353/j.issn.1004.9533.20131096
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Catalysts for Liquid-Oxidation of Fluorene to 9-Fluorenone
Zhao Ming, Xin Yanping, Xu Chunjian
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract 

9-Fluorenone, as an important fine chemical intermediate of very high economical value, is mainly prepared by catalytic oxidation of fluorene. The gas chromatography analysis method for reaction products was established, and the main components in the reaction products were analyzed qualitatively and quantitatively. With solid base as catalyst, type of catalysts, amount of catalyst, type of solvents, oxygen flow rate, temperature, reaction time and stirring speed which had effects on the reaction were experimentally determined. At the same time, the experiments on recycling and reusing catalyst were carried out. The results show catalyst of NaOH is a type of high-powered heterogeneous catalyst. Under optimal experimental conditions: m(catalyst):m(fluorene)=0.06:1, solvent of 30 mL, oxygen flow rate of 12 mL/min, reaction temperature of 40 ℃, reaction time of 4 h, stirring speed of 300 r/min, the conversion of fluorene and yield of 9-fluorenone can reach above 99% and 95%, respectively.

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Articles by authors
Zhao Ming
Xin Yanping
Xu Chunjian
Keywordsfluorene;   9-fluorenone;   catalyst;   NaOH     
Received 2013-06-24;
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Zhao Ming, Xin Yanping, Xu Chunjian.Catalysts for Liquid-Oxidation of Fluorene to 9-Fluorenone[J]  Chemcial Industry and Engineering, 2015,V32(6): 26-30
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