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

2004 ◽  
Vol 5 (8) ◽  
pp. 387-390 ◽  
Author(s):  
Yan Yan ◽  
En-Hua Kang ◽  
Ke-Er Yang ◽  
Shan-Ling Tong ◽  
Chi-Guang Fang ◽  
...  
Keyword(s):  
High Activity ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Air Pressure ◽  
Iron Porphyrin ◽  
Selective Catalytic Oxidation

Solvent-free liquid-phase selective catalytic oxidation of toluene to benzyl alcohol and benzaldehyde over CeO2-MnOx composite oxides

2022 ◽  
Author(s):  
Gui Chen ◽  
Kuiyi You ◽  
Xiangbo Gong ◽  
Fangfang Zhao ◽  
Zhenpan Chen ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Benzyl Alcohol ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Efficient Method ◽  
Value Added ◽  
Solvent Free ◽  
Composite Oxides ◽  
Selective Catalytic Oxidation

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...

scholarly journals 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 ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1281 ◽  
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.

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

2008 ◽  
Vol 86 (3) ◽  
pp. 199-204 ◽  
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.

Selective Catalytic Oxidation of CH Bonds with Molecular Oxygen

ChemCatChem ◽  
2012 ◽  
Vol 5 (1) ◽  
pp. 82-112 ◽  
Author(s):  
Emil Roduner ◽  
Wolfgang Kaim ◽  
Biprajit Sarkar ◽  
Vlada B. Urlacher ◽  
Jürgen Pleiss ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Selective Catalytic Oxidation

scholarly journals Selective Catalytic Oxidation of Cyclohexene with Molecular Oxygen: Radical Versus Nonradical Pathways

ChemCatChem ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 1035-1041 ◽  
Author(s):  
Ilse M. Denekamp ◽  
Martijn Antens ◽  
Thierry K. Slot ◽  
Gadi Rothenberg
Keyword(s):  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Oxygen Radical ◽  
Selective Catalytic Oxidation

Selective catalytic oxidation of geraniol to citral with molecular oxygen in supercritical carbon dioxide

2011 ◽  
Vol 394 (1-2) ◽  
pp. 209-214 ◽  
Author(s):  
Sudhir E. Dapurkar ◽  
Hajime Kawanami ◽  
Maya Chatterjee ◽  
Chandrasekhar V. Rode ◽  
Toshirou Yokoyama ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Selective Catalytic Oxidation ◽  
Supercritical Carbon
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