High activity in selective catalytic oxidation of naphthol to 2-hydroxy-1,4-naphthoquinone by molecular oxygen under air pressure over recycled iron porphyrin catalysts

An efficient method for highly selective preparation of the high value-added benzyl alcohol (BOL) and benzaldehyde (BAL) from liquid-phase catalytic oxidation of toluene with molecular oxygen over CeO2-MnOx composite oxides...

Download Full-text

Radical Cation Pathways for Selective Catalytic Oxidation by Molecular Oxygen

Oxygen Complexes and Oxygen Activation by Transition Metals ◽

10.1007/978-1-4613-0955-0_14 ◽

1988 ◽

pp. 189-201 ◽

Cited By ~ 2

Author(s):

Dennis P. Riley ◽

Milton R. Smith

Keyword(s):

Catalytic Oxidation ◽

Molecular Oxygen ◽

Radical Cation ◽

Selective Catalytic Oxidation ◽

Oxidation By Molecular Oxygen

Download Full-text

ChemInform Abstract: Selective Catalytic Oxidation of C-H Bonds with Molecular Oxygen

ChemInform ◽

10.1002/chin.201323197 ◽

2013 ◽

Vol 44 (23) ◽

pp. no-no

Author(s):

Emil Roduner ◽

et al. et al.

Keyword(s):

Catalytic Oxidation ◽

Molecular Oxygen ◽

Selective Catalytic Oxidation

Download Full-text

Novel Effect of Zinc Nitrate/Vanadyl Oxalate for Selective Catalytic Oxidation of α-Hydroxy Esters to α-Keto Esters with Molecular Oxygen: An In Situ ATR-IR Study

Molecules ◽

10.3390/molecules24071281 ◽

2019 ◽

Vol 24 (7) ◽

pp. 1281 ◽

Cited By ~ 1

Author(s):

Yongwei Ju ◽

Zhongtian Du ◽

Chuhong Xiao ◽

Xingfei Li ◽

Shuang Li

Keyword(s):

Catalytic Activity ◽

Catalytic Oxidation ◽

Molecular Oxygen ◽

Aerobic Oxidation ◽

Value Added ◽

Attenuated Total Reflection ◽

Reaction Conditions ◽

Keto Esters ◽

Selective Catalytic Oxidation ◽

Hydroxy Esters

Selective oxidation of α-hydroxy esters is one of the most important methods to prepare high value-added α-keto esters. An efficient catalytic system consisting of Zn(NO3)2/VOC2O4 is reported for catalytic oxidation of α-hydroxy esters with molecular oxygen. Up to 99% conversion of methyl DL-mandelate or methyl lactate could be facilely obtained with high selectivity for its corresponding α-keto ester under mild reaction conditions. Zn(NO3)2 exhibited higher catalytic activity in combination with VOC2O4 compared with Fe(NO3)3 and different nitric oxidative gases were detected by situ attenuated total reflection infrared (ATR-IR) spectroscopy. UV-vis and ATR-IR results indicated that coordination complex formed in Zn(NO3)2 in CH3CN solution was quite different from Fe(NO3)3; it is proposed that the charge-transfer from Zn2+ to coordinated nitrate groups might account for the generation of different nitric oxidative gases. The XPS result indicate that nitric oxidative gas derived from the interaction of Zn(NO3)2 with VOC2O4 could be in favor of oxidizing VOC2O4 to generate active vanadium (V) species. It might account for different catalytic activity of Zn(NO3)2 or Fe(NO3)3 combined with VOC2O4. This work contributes to further development of efficient aerobic oxidation under mild reaction conditions.

Download Full-text

Highly selective oxidation of toluene using air over [Fe(III)TPP]Cl supported on chitosan

Canadian Journal of Chemistry ◽

10.1139/v08-002 ◽

2008 ◽

Vol 86 (3) ◽

pp. 199-204 ◽

Cited By ~ 11

Author(s):

Guan Huang ◽

Chun-Cai Cai ◽

Jin Luo ◽

Hong Zhou ◽

Yong-An Guo ◽

...

Keyword(s):

Liquid Phase ◽

Environmental Pollution ◽

Benzyl Alcohol ◽

Catalytic Oxidation ◽

Iron Porphyrin ◽

Optimum Conditions ◽

Toluene Oxidation ◽

Selective Catalytic Oxidation ◽

Amine Groups ◽

Chitosan Chain

The highly selective catalytic oxidation of toluene with air to benzaldehyde and benzyl alcohol in the liquid phase has been studied with the use of iron tetraphenylporphyrin (Fe TPP) supported on chitosan (CTS), (Fe TPP/CTS). The rates of toluene conversion and selectivity (aldehyde + alcohol) were subject to the reaction temperature, air pressure, and amount of iron tetraphenylporphyrin. By the use of the Fe TPP/CTS, containing 2 mg of iron tetraphenylporphyrin as catalyst, toluene oxidation with air under the optimum conditions of 190 °C and 0.6 MPa produced benzaldehyde and benzyl alcohol at 90% selectivity and 5.4% conversion of toluene, the mole turnover of the catalyst was about 6 × 106, and it could be reused efficiently for one more time. It is suggested that the amine groups (–NH2) on the chitosan chain act as a key assistor to the catalysis of Fe TPP for toluene oxidation. Compared with the conventional method of synthesizing benzaldehyde and benzyl alcohol, the new method has the advantages of reduced environmental pollution, higher selectivity for the two main products, and easy recovery of the catalyst.Key words: chitosan-supported iron porphyrin, catalysis, toluene oxidation, benzaldehyde, benzyl alcohol.

Download Full-text