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Toluene oxyfunctionalization with air over metalloporphyrins and reaction condition
optimization

LI Yongfei; YAN Xuhui; JIANG Guofang; LIU Qiang; SONG Jianxin; GUO Cancheng   

  1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-06-28 Published:2007-06-28
  • Contact: LI Yongfei

金属卟啉催化的甲苯氧化及工艺优化

李勇飞; 严旭辉; 江国防; 刘强; 宋建新; 郭灿城   

  1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
  • 通讯作者: 李勇飞

Abstract: Catalytic activities of a series of metalloporphyrin complexes in selective aerobic
oxidation of toluene were investigated. The effects of different central metal ions in
metalloporphyrins [T(p-Cl)PPMCl (M=Fe,Co,Mn,Cu)] on the reaction course had been examined
and it was found that T(p-Cl)PPCu presented the highest catalytic activity in the reaction.
The reaction conditions of toluene oxidation were optimized by using orthogonal experiment
design. Five relevant factors were investigated: temperature, air pressure, catalyst
loading, air flow rate and reaction time. The effects of the five factors on both toluene
conversion and total yield of benzaldehyde and benzyl alcohol were discussed. The research
results showed that the reaction temperature was the most significant factor influencing
toluene oxidation. On the basis of the margin analysis, the optimum conditions for the
toluene conversion and the total yield of benzaldehyde and benzyl alcohol respectively were
achieved, under which the toluene conversion was up to 14.67% and the total yield of
benzaldehyde and benzyl alcohol reached 5.89%.

Key words: toluene, metalloporphyrins, catalysis, aerobic oxidation, optimization

摘要: Catalytic activities of a series of metalloporphyrin complexes in selective aerobic
oxidation of toluene were investigated. The effects of different central metal ions in
metalloporphyrins [T(p-Cl)PPMCl (M=Fe,Co,Mn,Cu)] on the reaction course had been examined
and it was found that T(p-Cl)PPCu presented the highest catalytic activity in the reaction.
The reaction conditions of toluene oxidation were optimized by using orthogonal experiment
design. Five relevant factors were investigated: temperature, air pressure, catalyst
loading, air flow rate and reaction time. The effects of the five factors on both toluene
conversion and total yield of benzaldehyde and benzyl alcohol were discussed. The research
results showed that the reaction temperature was the most significant factor influencing
toluene oxidation. On the basis of the margin analysis, the optimum conditions for the
toluene conversion and the total yield of benzaldehyde and benzyl alcohol respectively were
achieved, under which the toluene conversion was up to 14.67% and the total yield of
benzaldehyde and benzyl alcohol reached 5.89%.

关键词: toluene;metalloporphyrins;catalysis;aerobic oxidation;optimization