Oxidation of Benzaldehyde to Benzoic Acid with Aqueous Hydrogen Peroxide over Dodecatungstophosphoric Acid

2013 ◽  
Vol 781-784 ◽  
pp. 219-222
Author(s):  
Qiu Ying Huang ◽  
Bei Bei Dong ◽  
Xiu Cheng Zheng
Keyword(s):  
Hydrogen Peroxide ◽  
Benzoic Acid ◽  
Catalytic Reaction ◽  
Type Structure ◽  
Optimal Parameters ◽  
Reaction Parameters ◽  
Aqueous Hydrogen Peroxide ◽  
Reaction Conditions ◽  
Prepared Sample ◽  
Keggin Type

Dodecatungstophosphoric acid was synthesized and used as catalyst for oxidation of benzaldehyde to benzoic acid with aqueous hydrogen peroxide. The effect of various catalytic reaction parameters including time, temperatures, and the amount of catalyst on the yield of benzoic acid was investigated in details. The results indicated that the as-prepared sample was in the keggin-type structure and the optimal parameters under the reaction conditions were as follows: 0.5 g of catalyst, reacted at 80 C for 5 h.

scholarly journals A facile and effective method for preparation of 2.5-furandicarboxylic acid via hydrogen peroxide direct oxidation of 5-hydroxymethylfurfural

2017 ◽  
Vol 19 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Shuang Zhang ◽  
Long Zhang
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Time ◽  
Oxidation Mechanism ◽  
Molar Ratio ◽  
Alkaline Condition ◽  
Optimal Parameters ◽  
Direct Oxidation ◽  
Reaction Parameters ◽  
Alkaline Conditions ◽  
Furandicarboxylic Acid

Abstract In this paper, 2,5-furandicarboxylic acid (FDCA) was efficiently prepared by the direct oxidation of 5-hydroxymethylfurfural (5-HMF) using hydrogen peroxide (H2O2) in alkaline conditions without any catalysts. The effects of reaction parameters on the process were systematically investigated and the optimal parameters were obtained as follows: molar ratio of 5-HMF:KOH:H2O2 was 1:4:8, reaction temperature and reaction time were determined as 70°C and 15 minutes, respectively. Under these conditions, the yield of FDCA was 55.6% and the purity of FDCA could reach 99%. Moreover, we have speculated the detailed oxidation mechanism of 5-HMF assisted by hydrogen peroxide in alkaline condition to synthesize FDCA.

Keggin-type polyoxotungstates as catalysts in the oxidation of cyclohexane by dilute aqueous hydrogen peroxide

1999 ◽  
Vol 144 (3) ◽  
pp. 461-468 ◽  
Author(s):  
M.M.Q. Simões ◽  
C.M.M. Conceição ◽  
J.A.F. Gamelas ◽  
P.M.D.N. Domingues ◽  
A.M.V. Cavaleiro ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Hydrogen Peroxide ◽  
Keggin Type
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