Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (11): 1286-1293.DOI: 10.11944/j.issn.1000-0518.2019.11.190073

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Selective Oxidation of Alcohols to Carbonyl Compounds over Metalloporphyrins with MgAl Hydrotalcite Additive

CHEN Chuan(),XU Yingdi,XUE Xuming(),ZHOU Pengpeng   

  1. College of Chemical & Materials Engineering,Changzhou Vocational Institute of Engineering,Changzhou,Jiangsu 213164,China
  • Received:2019-03-19 Accepted:2019-05-27 Published:2019-11-01 Online:2019-11-05
  • Contact: CHEN Chuan
  • Supported by:
    Supported by Jiangsu Education Department, Construction of Brand Speciality in 2015 in Jiangsu Province(No.PPZY2015B178)

Abstract:

The selective aerobic oxidation of alcohols to carbonyl compounds was achieved by introduction of MgAl hydrotalcite into the metallotetraphenylporphyrins(MTPPs, M=Co, Fe, Mn, Ni) catalytic oxidation system. The results indicated that CoTPP exhibited the highest catalytic activity in the oxidation of benzyl alcohol to benzaldehyde through molecular oxygen/isobutyraldehyde(IBA) system, and MgAl hydrotalcite additive could effectively improve the catalytic selectivity of aldehyde. Under the optimized conditions(benzyl alcohol 1 mmol, acetonitrile 2 mL, CoTPP 5 mg, MgAl hydrotalcite 18 mg, IBA 5 mmol, reaction temperature 60 ℃, oxygen atmosphere, reaction time 2 h), the conversion of benzyl alcohol and the selectivity of benzaldehyde reached 94% and 92%, respectively. The catalytic system also exhibited good catalytic performance in the oxidation of other benzylic alcohols.

Key words: cobalt porphyrin, hydrotalcite, alcohol, selective oxidation, base