Selective direct hydroxylation of benzene to phenol with hydrogen peroxide by iron and vanadyl based homogeneous and heterogeneous catalysts

2016 ◽  
Vol 6 (22) ◽  
pp. 8166-8176 ◽  
Author(s):  
Liliana Carneiro ◽  
Ana Rosa Silva
Keyword(s):  
Hydrogen Peroxide ◽  
Heterogeneous Catalysts ◽  
High Selectivity ◽  
Mild Conditions ◽  
Hydroxylation Of Benzene ◽  
Very High ◽  
Direct Hydroxylation

With our homogeneous and heterogeneous catalysts, very high selectivity to phenol was achieved, with yields comparable to or higher than the ones reported in the literature, under mild conditions.

Highly Selective Oxidation of Cinnamaldehyde to Benzaldehyde by Hydrogen Peroxide in Mild Conditions

2014 ◽  
Vol 522-524 ◽  
pp. 458-464
Author(s):  
Yuan Mei Nie ◽  
Yong Peng An ◽  
Cai Hua Peng ◽  
Xing Dong Yao
Keyword(s):  
Hydrogen Peroxide ◽  
Hydrogen Bond ◽  
Sodium Bicarbonate ◽  
Propylene Glycol ◽  
Selective Oxidation ◽  
High Selectivity ◽  
Protic Solvent ◽  
Hydrogen Bond Interaction ◽  
Mild Conditions ◽  
Effect Of Solvent

Benzaldehyde was produced from oxidation of cinnamaldehyde by hydrogen peroxide in propylene glycol in the presence of sodium bicarbonate. Protic solvent demonstrated high selectivity and the yield of benzaldehyde could reach up to 82% in propylene glycol. The effect of solvent on the selectivity was attributed to hydrogen bond interaction between the oxidation intermediate epoxide and the solvent.

Direct Hydroxylation of Benzene to Phenol Using Hydrogen Peroxide Catalyzed by Nickel Complexes Supported by Pyridylalkylamine Ligands

2015 ◽  
Vol 137 (18) ◽  
pp. 5867-5870 ◽  
Author(s):  
Yuma Morimoto ◽  
Shuji Bunno ◽  
Nobutaka Fujieda ◽  
Hideki Sugimoto ◽  
Shinobu Itoh
Keyword(s):  
Hydrogen Peroxide ◽  
Nickel Complexes ◽  
Hydroxylation Of Benzene ◽  
Direct Hydroxylation

scholarly journals Modifications in the Composition of CuO/ZnO/Al2O3 Catalyst for the Synthesis of Methanol by CO2 Hydrogenation

2021 ◽  
Author(s):  
Bianca Trifan ◽  
Javier Lasobras ◽  
Jaime Soler ◽  
Javier Herguido ◽  
Miguel Menéndez
Keyword(s):  
High Pressure ◽  
Renewable Energy ◽  
Heterogeneous Catalysts ◽  
High Selectivity ◽  
Efficient Catalyst ◽  
Synthesis Time ◽  
Mild Conditions ◽  
Temperature And Pressure ◽  
Synthesis Of Methanol ◽  
Co Precipitation

Renewable methanol, obtained from CO2 and hydrogen provided from renewable energy, has been proposed as a way to close the CO2 loop. In industry, methanol synthesis using the catalyst CuO/ZnO/Al2O3 occurs at a high pressure. We intend to make certain modification on the traditional catalyst in order to work at lower pressure, maintaining high selectivity. Therefore, three heterogeneous catalysts have been synthesized by co-precipitation in order to improve the activity and the selectivity to methanol under mild conditions of temperature and pressure. Certain modifications on the traditional catalyst Cu/Zn/Al2O3 were employed such as the modification of the synthesis time and the addition of Pd as a dopant agent. The most efficient catalyst among those tested was a palladium-doped catalyst, 5% Pd/Cu/Zn/Al2O3. This had a selectivity of 64% at 210C and 5 bar.

scholarly journals Modifications in the Composition of CuO/ZnO/Al2O3 Catalyst for the Synthesis of Methanol by CO2 Hydrogenation

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 774
Author(s):  
Bianca Trifan ◽  
Javier Lasobras ◽  
Jaime Soler ◽  
Javier Herguido ◽  
Miguel Menéndez
Keyword(s):  
High Pressure ◽  
Heterogeneous Catalysts ◽  
High Selectivity ◽  
Co2 Hydrogenation ◽  
Efficient Catalyst ◽  
Synthesis Time ◽  
Mild Conditions ◽  
Temperature And Pressure ◽  
Synthesis Of Methanol ◽  
Al2o3 Catalyst

Renewable methanol, obtained from CO2 and hydrogen provided from renewable energy, was proposed to close the CO2 loop. In industry, methanol synthesis using the catalyst CuO/ZnO/Al2O3 occurs at a high pressure. We intend to make certain modification on the traditional catalyst to work at lower pressure, maintaining high selectivity. Therefore, three heterogeneous catalysts were synthesized by coprecipitation to improve the activity and the selectivity to methanol under mild conditions of temperature and pressure. Certain modifications on the traditional catalyst Cu/Zn/Al2O3 were employed such as the modification of the synthesis time and the addition of Pd as a dopant agent. The most efficient catalyst among those tested was a palladium-doped catalyst, 5% Pd/Cu/Zn/Al2O3. This had a selectivity of 64% at 210 °C and 5 bar.

A reusable citric acid modified V/AC catalyst prepared by dielectric barrier discharge for hydroxylation of benzene to phenol

2022 ◽  
Author(s):  
Xiuying Li ◽  
Siyu Li ◽  
Wenting Jia ◽  
Qi Sun ◽  
Yue Zhang
Keyword(s):  
Citric Acid ◽  
Dielectric Barrier Discharge ◽  
High Selectivity ◽  
Barrier Discharge ◽  
Environmentally Benign ◽  
Dielectric Barrier ◽  
Hydroxylation Of Benzene ◽  
Direct Hydroxylation

Direct hydroxylation of benzene with high selectivity and durability toward phenol production is still a challenge. Herein, a reusable VxOy/AC(cit)-DBD catalyst was synthesized by a facile and environmentally benign method...

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