scholarly journals Using High-Power UV-LED to Accelerate a Decatungstate-Anion-Catalyzed Reaction: A Model Study for the Quick Oxidation of Benzyl Alcohol to Benzoic Acid Using Molecular Oxygen

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1307
Author(s):  
Mamoru Hyodo ◽  
Hitomi Iwano ◽  
Takayoshi Kasakado ◽  
Takahide Fukuyama ◽  
Ilhyong Ryu
Keyword(s):  
Benzoic Acid ◽  
Benzyl Alcohol ◽  
Molecular Oxygen ◽  
High Power ◽  
Oxidation Reaction ◽  
Uv Led ◽  
Oxidation Of Benzyl Alcohol ◽  
Model Study ◽  
Catalyzed Oxidation ◽  
Led Irradiation

High-power UV-LED irradiation (365 nm) effectively accelerated the decatungstate-anion-catalyzed oxidation of benzyl alcohol 1 to benzoic acid 3 via benzaldehyde 2. As the power of the UV-LED light increased, both the selectivity and yield of benzoic acid also increased. The reaction was finished within 1 h to give 3 in a 93% yield using 2 mol% of decatungstate anion catalyst. The combination of a flow photoreactor and high-power irradiation accelerated the oxidation reaction to an interval of only a few minutes.

Selectively Catalyzed Oxidation of Benzyl Alcohol by FeIII–TAML/Hydrogen Peroxide

2015 ◽  
Vol 723 ◽  
pp. 601-604 ◽  
Author(s):  
Ran Li ◽  
Ge Wang ◽  
Yan Chun Liu ◽  
Xiao Bin Chen ◽  
Zhi Min Sun ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Time ◽  
Benzyl Alcohol ◽  
Reaction Temperature ◽  
Oxidation Reaction ◽  
Macrocyclic Ligands ◽  
Temperature Reaction ◽  
Oxidation Of Benzyl Alcohol ◽  
Catalyzed Oxidation

Benzyl alcohol was selectively oxidized to benzaldehyde with iron (III) complexed to tetra amido macrocyclic ligands (FeIII–TAML) as catalyst and 30% H2O2 as oxidant. The effect of reaction temperature, reaction time, solvent, amount of catalyst and oxidant on the reaction of catalyzed oxidation of benzyl alcohol were explored. The conversion and selectivity of this oxidation reaction were calculated from calibrated GC yields of benzyl alcohol and benzaldehyde. When oxidation reaction was conducted under the conditions: solvent NMMO: ethanol = 1: 1, n (H2O2): n (benzyl alcohol) = 2, n (catalyst): n (benzyl alcohol) = 1%, temperature 80 ̊C and reaction time 60 minutes, the conversion was 91.23% and the selectivity was 90.12%.

Synthesis and Characterization of Manganese Oxide and Investigation of its Catalytic Activities for Oxidation of Benzyl Alcohol in Liquid Phase

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Mohammad Ilyas ◽  
Muhammad Saeed
Keyword(s):  
Liquid Phase ◽  
Benzoic Acid ◽  
Manganese Oxide ◽  
Benzyl Alcohol ◽  
Catalyst Loading ◽  
Reaction Products ◽  
Nitrogen Effect ◽  
Oxidation Of Benzyl Alcohol ◽  
Reaction Performance ◽  
Catalyst Effect

Manganese oxide was prepared by mechano-chemical process in solid state and was characterized by chemical and physical techniques. Chemical techniques include determination of oxygen content while physical techniques, includes surface area and pore size analyses, particle size, XRD, FTIR and SEM analyses. The synthesized manganese oxide was shown to have octahedral layered structure. The catalytic activity of manganese oxide was studied by carrying out the oxidation of benzyl alcohol in liquid phase using n-octane as solvent at temperature (<373) and oxygen pressure of up to one atmosphere. Benzaldehyde and benzoic acid were identified as the reaction products. However, benzoic acid appeared in reaction mixture after complete conversion of benzyl alcohol to benzaldehyde. Influence of different reaction parameters like comparison of reduced and unreduced catalyst, leaching of catalyst, effect of air, oxygen and nitrogen, effect of catalyst loading, life span of catalyst, effect of time and effect of partial pressure of oxygen on the reaction performance was studied. The catalyst can easily be separated from the reaction mixture by filtration, and can be regenerated by washing with water and ethanol and drying at 323 K.

scholarly journals Continuous Heterogeneously Catalyzed Oxidation of Benzyl Alcohol Using a Tube-in-Tube Membrane Microreactor

2015 ◽  
Vol 54 (16) ◽  
pp. 4183-4189 ◽  
Author(s):  
Gaowei Wu ◽  
Achilleas Constantinou ◽  
Enhong Cao ◽  
Simon Kuhn ◽  
Moataz Morad ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Oxidation Of Benzyl Alcohol ◽  
Catalyzed Oxidation

K5PW11NiO39-catalyzed oxidation of benzyl alcohol with hydrogen peroxide

2019 ◽  
Vol 4 (1) ◽  
pp. 302-310
Author(s):  
Nelson C. Coronel ◽  
Márcio J. da Silva ◽  
Sukarno O. Ferreira ◽  
Rene C. da Silva ◽  
Ricardo Natalino
Keyword(s):  
Hydrogen Peroxide ◽  
Benzyl Alcohol ◽  
Oxidation Of Benzyl Alcohol ◽  
Catalyzed Oxidation
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