Metalloporphyrin catalytic oxidations of hydrocarbons by H2O2

2000 ◽  
Vol 04 (06) ◽  
pp. 599-604 ◽  
Author(s):  
ANTÓNIO M. d'A. ROCHA GONSALVES ◽  
ARMÉNIO C. SERRA
Keyword(s):  
Hydrogen Peroxide ◽  
Benzoic Acid ◽  
Catalytic Oxidation ◽  
Phase System ◽  
Two Phase ◽  
Catalytic Oxidations ◽  
Oxidation Of Hydrocarbons ◽  
Oxygen Donor ◽  
Catalyst Efficiency

The metalloporphyrin catalytic oxidation of hydrocarbons using dilute hydrogen peroxide as oxygen donor with a two-phase system in the presence of an excess of benzoic acid is studied. Porphyrins derived from meso-tetrakis(2,6-dichlorophenyl)porphyrin and bearing sulfonamide substituents at β or meso positions and halogens at β positions were used. The system allowed for very efficient catalytic epoxidations and hydroxylations of hydrocarbons. It is proved that the excess of benzoic acid is critical to the catalyst efficiency and stability. The role of the lipophilic acid in this system is discussed.

Catalytic oxidation of olefins and alcohols with hydrogen peroxide in a two-phase system giving mono- and dicarboxylic acids

2005 ◽  
Vol 54 (8) ◽  
pp. 1847-1854 ◽  
Author(s):  
Z. P. Pai ◽  
A. G. Tolstikov ◽  
P. V. Berdnikova ◽  
G. N. Kustova ◽  
T. B. Khlebnikova ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Oxidation ◽  
Dicarboxylic Acids ◽  
Phase System ◽  
Two Phase ◽  
Oxidation Of Olefins

Two‐Phase System Utilizing Hydrophobic Metal–Organic Frameworks (MOFs) for Photocatalytic Synthesis of Hydrogen Peroxide

2019 ◽  
Vol 131 (16) ◽  
pp. 5456-5460 ◽  
Author(s):  
Yusuke Isaka ◽  
Yudai Kawase ◽  
Yasutaka Kuwahara ◽  
Kohsuke Mori ◽  
Hiromi Yamashita
Keyword(s):  
Hydrogen Peroxide ◽  
Metal Organic Frameworks ◽  
Phase System ◽  
Two Phase ◽  
Metal Organic ◽  
Photocatalytic Synthesis

Influence of Compressed Carbon Dioxide on the Oxidation of Cyclohexane with Hydrogen Peroxide in Acetic Acid

2006 ◽  
Vol 59 (3) ◽  
pp. 225 ◽  
Author(s):  
Liang Gao ◽  
Tao Jiang ◽  
Buxing Han ◽  
Baoning Zong ◽  
Xiaoxin Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Binary System ◽  
Reaction System ◽  
Phase Region ◽  
Phase Behaviour ◽  
Phase System ◽  
Two Phase ◽  
Three Phase

The oxidation of cyclohexane with H2O2 in a compressed CO2/acetic acid binary system was studied at 60.0 and 80.0°C, at pressures up to 18 MPa, and with the zeolite TS-1 as catalyst. The phase behaviour of the reaction system was also observed. There are three fluid phases in the reaction system at lower pressure but two at higher pressures. In the three-phase region the yields of the products, cyclohexanol and cyclohexanone, increase considerably with increasing pressure and reaches a maximum near the phase-separating pressure. CO2 can thus enhance the reaction effectively. However, the effect of pressure on the yield is very limited after the transition to a two-phase system.

Study on the Role of Surfactants to Aqueous Two-Phase Synthesizing CPAM

2013 ◽  
Vol 781-784 ◽  
pp. 511-514
Author(s):  
Ya Feng Cao ◽  
Mei Jun Qu ◽  
Feng Zhi Tan ◽  
Zhao Li Liu ◽  
Yuan Li
Keyword(s):  
Monomer Conversion ◽  
Continuous Phase ◽  
Ionic Surfactants ◽  
Process Conditions ◽  
Phase System ◽  
Two Phase ◽  
Optimum Reaction ◽  
Optimum Reaction Condition ◽  
Better Than

In this paper,cationic polyacrylamide (CPAM) was synthesized by using aqueous two-phase polymerization. The Role of surfactants to aqueous two-phase synthesizing CPAM was studied, including the effect of the type,the composition and the concentration of the surfactants. The results showed that non-ionic surfactants had a better stabilizing impact on the polymer aqueous two-phase system. And the effect of the compound surfactant was better than that of a single surfactant. Take the chemical compound of Tween80 and OP10 as the polymerization auxiliaries, the optimum reaction condition of synthesis were as follows:wTween80:ѡOP10=1.5,w=1.6%, 50°C.In this process conditions, the distribution coefficient was the most appropriate in the continuous phase, the total monomer conversion rate and the intrinsic viscosity number of the product reached the maximum.

Catalytic oxidation of benzoic acid in acetic acid: Aromatic hydroxylation with in situ-generated hydrogen peroxide

1991 ◽  
Vol 69 (2) ◽  
pp. 215-222 ◽  
Author(s):  
Akikazu Itoh ◽  
Yasushi Kuroda ◽  
Tomoyuki Kitano ◽  
Guo Zhi-Hu ◽  
Atsutaka Kunai ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Benzoic Acid ◽  
Catalytic Oxidation ◽  
Aromatic Hydroxylation

Microwave-assisted oxidation of alcohols by hydrogen peroxide catalysed by tetrabutylammonium decatungstate

2013 ◽  
Vol 67 (9) ◽  
Author(s):  
Mateusz Galica ◽  
Wiktor Kasprzyk ◽  
Szczepan Bednarz ◽  
Dariusz Bogdał
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Microwave Irradiation ◽  
Solvent System ◽  
Elevated Pressure ◽  
Phase System ◽  
Two Phase ◽  
Microwave Assisted ◽  
Optimum Parameters ◽  
Oxidation Of Alcohols

AbstractThis work deals with catalytic activity of tetrabutylammonium decatungstate(VI) in the oxidation of selected alcohols with hydrogen peroxide as an oxidant using 1,2-dichloroethane/water or acetonitrile/water as a solvent system. Different forms of heating were compared. The highest conversions of substrates were achieved in the two phase system acetonitrile/water using microwave irradiation combined with elevated pressure. Finally, optimum parameters for these reactions in a microwave pressurised reactor were established and discussed.

A hydrophobic titanium doped zirconium-based metal organic framework for photocatalytic hydrogen peroxide production in a two-phase system

2020 ◽  
Vol 8 (4) ◽  
pp. 1904-1910 ◽  
Author(s):  
Xiaolang Chen ◽  
Yasutaka Kuwahara ◽  
Kohsuke Mori ◽  
Catherine Louis ◽  
Hiromi Yamashita
Keyword(s):  
Hydrogen Peroxide ◽  
Benzyl Alcohol ◽  
Metal Organic Framework ◽  
Phase System ◽  
Hydrogen Peroxide Production ◽  
Two Phase ◽  
System P ◽  
Metal Organic ◽  
System Water ◽  
Organic Framework

A hydrophobic Ti doped Zr-based MOF was synthesized and used for photocatalytic H2O2 production in a two-phase system (water/benzyl alcohol).

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