Experimental Study on Cyclohexane by Catalytic Oxidation Using H2O2/Ferrous Sulfate

2011 ◽  
Vol 233-235 ◽  
pp. 1288-1291
Author(s):  
Jiao Jing Zhang ◽  
Bing Bai ◽  
Hua Song
Keyword(s):  
Hydrogen Peroxide ◽  
Experimental Study ◽  
Reaction Time ◽  
Catalytic Oxidation ◽  
Ferrous Sulfate ◽  
Atmospheric Condition ◽  
Temperature Reaction ◽  
Catalyst Amount ◽  
Volume Reaction ◽  
Solvent Volume

Catalytic oxidation of cyclohexane to cyclohexanone and cyclohexanol using hydrogen peroxide over ferrous sulfate catalyst at atmospheric condition was studied. Effect of the solvent volume, catalyst amount, hydrogen peroxide volume, reaction temperature, reaction time on reaction was investigated. Results showed that using 10 mL of acetone, 0.02 g of a ferrous sulfate and 0.5 mL of hydrogen peroxide at thereaction temperature of 80 °C for 8 h, the conversion of cyclohexane was 35.35%, the total selectivity of cyclohexanone and cyclohexanol was 94.06%.

Experimental Study on Catalytic Oxidation of Cyclohexane Catalyzed by Phosphomolybdic Acid

2012 ◽  
Vol 549 ◽  
pp. 411-414
Author(s):  
Jiao Jing Zhang ◽  
Hua Lin Song ◽  
Jian Wang ◽  
Hua Song
Keyword(s):  
Hydrogen Peroxide ◽  
Experimental Study ◽  
Reaction Time ◽  
Catalytic Oxidation ◽  
Reaction Temperature ◽  
Phosphomolybdic Acid ◽  
Catalyst Amount

The catalytic oxidation of cyclohexane to cyclohexanone and cyclohexanol using hydrogen peroxide over phosphomolybdic acid were studied. Factors such as the amount of catalyst, amount of the oxidant (H2O2), reaction temperature and reaction time were investigated. The conversion of cyclohexane was 35.35%, the total selectivity to cyclohexanone and cyclohexanol was 97.68% at a reaction temperature of 70 °C, reaction time of 8 h, 10 mL of acetone, 0.01 g of phosphomolybdic acid and 0.5 mL of hydrogen peroxide.

Removal of Thiophene from Simulated Oil by Catalytic Oxidation Using K2FeO4/ V2O5

2011 ◽  
Vol 183-185 ◽  
pp. 1568-1572
Author(s):  
Yan Xiu Liu ◽  
Hua Song
Keyword(s):  
Reaction Time ◽  
Catalytic Oxidation ◽  
Sulfur Content ◽  
Reaction Temperature ◽  
Temperature Reaction ◽  
Optimal Conditions ◽  
Catalyst Amount ◽  
Deep Desulfurization

Oxidation extraction of thiophene from simulated oil by using K2FeO4as oxidant and methanol as extractant has been investigated. The effects of different catalyst, oxidant amount, catalyst amount, reaction temperature, reaction time, and extraction conditions were studied. This process is capable of decreasing the sulfur content of simulated oil from 100 mg•L-1to 17.8 mg•L-1at the optimal conditions. The results indicate that such a process could be an alternative to common hydrodesulfurization for deep desulfurization.

scholarly journals Influence of low-temperature reaction time on morphology and phase composition of short calcium phosphate whiskers

2019 ◽  
Vol 13 (1) ◽  
pp. 57-64 ◽  
Author(s):  
Monika Biernat ◽  
Zbigniew Jaegermann ◽  
Paulina Tymowicz-Grzyb ◽  
Gustaw Konopka
Keyword(s):  
Hydrogen Peroxide ◽  
Phase Composition ◽  
Reaction Time ◽  
Calcium Phosphate ◽  
Biphasic Calcium Phosphate ◽  
Calcium Pyrophosphate ◽  
Temperature Reaction ◽  
Test Results ◽  
Lower Temperature ◽  
Hydrothermal Methods

The present work shows the results of the synthesis of multiphasic calcium phosphate whiskers from a mixture of biphasic calcium phosphate (?-tricalcium phosphate (?-TCP) and calcium pyrophosphate (CPP)) in the hydrogen peroxide solution-mediated process carried out in different time ranges. The process was performed at considerably lower temperature than typical hydrothermal methods used for obtaining of whiskers. Test results show that using the above-mentioned procedure triphasic calcium phosphate consisting of hydroxyapatite (HA),(?-TCP) and CPP can be obtained, where the whiskers are formed mainly from hydroxyapatite. It was found that morphology, phase composition and specific surface area of the reaction product can be controlled by changing the reaction time. The obtained triphasic HA/?-TCP/CPP short whiskers may be considered as a promising biocompatible and resorbable reinforcement in composites for bone tissue engineering with a faster resorption rate than that of HA.

Conversion of Glucose to Levulinic Acid Catalyzed by ZSM-5 Loading SO42-/ ZrO2

2013 ◽  
Vol 291-294 ◽  
pp. 249-252
Author(s):  
Ying Liu ◽  
Lu Lin ◽  
Xiao Yu Sui ◽  
Jun Ping Zhuang ◽  
Chun Sheng Pang
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Levulinic Acid ◽  
Temperature Reaction ◽  
Catalyst Amount ◽  
Hydroxymethyl Furfural ◽  
Ft Ir ◽  
Acid Catalyzed ◽  
Molar Percent ◽  
Hydrolysis Of

Hydrolysis of glucose to produce levulinic acid catalyzed by ZSM-5 loading SO42-/ ZrO2 was studied in this paper. The effects of different factors such as catalyst amount, reaction temperature, reaction time on the yields of levulinic acid and hydroxymethyl furfural were investigated. It was found that the highest yield of levulinic acid was 55.03% (molar percent) under the conditions of catalyst amount 3 g, reaction temperature 180 °C and reaction time 2.5 h. Surface structure of catalyst was analyzed by FT-IR, indicating that crystallinity of catalyst was 0.66.

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%.

Preparation of 2-Methyl-1,4-Naphthoquinone(vitamin K3) by Catalytic Oxidation of 2-Methylnaphthalene with Sulfuric Acid as Catalyst

2013 ◽  
Vol 634-638 ◽  
pp. 664-668
Author(s):  
Ming Hao Zhou ◽  
Ting Feng Yan ◽  
Hong Yan Zhu ◽  
Guo Min Xiao
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Sulfuric Acid ◽  
Reaction Time ◽  
Vitamin K ◽  
Target Product ◽  
Temperature Reaction ◽  
Product Selectivity ◽  
Vitamin K3 ◽  
Substrate Conversion

The oxidation of 2-methylnaphthalene(2-MN) to 2-methyl-1,4-naphthoquinone(2-MNQ, Vitamin K3) was accomplished in acetic acid with the application of hydrogen peroxide as oxidant. The yield of 2-MNQ was up to 81.3% when sulfuric acid used as catalyst. The catalyst exhibits excellent substrate conversion and target product selectivity. Different parameters affecting the oxidation of 2-methylnaphthalene with hydrogen peroxide catalyzed by sulfuric acid were described, such as reaction temperature, reaction time, dosage of hydrogen peroxide, and amount of sulfuric acid. Compared with the traditional methods for the preparation of Vitamin K3 with yield of only 30-50%, this method presented could be more effective, economical and ecofriendly.

Catalytic Methoxycarbonylation of 1,6-Hexamethylenediamine with Methyl Carbamate to Dimethylhexane-1,6-Dicarbamate

2013 ◽  
Vol 634-638 ◽  
pp. 490-493
Author(s):  
Bing Han ◽  
Wen Bo Zhao ◽  
Xian Ye Qin ◽  
Yan Hong Li ◽  
Wei Wei
Keyword(s):  
Catalytic Activity ◽  
Reaction Time ◽  
Metal Oxides ◽  
Reaction Temperature ◽  
Lead Dioxide ◽  
Temperature Reaction ◽  
Catalyst Amount ◽  
Methyl Carbonate

A series of metal oxides were employed as catalysts for the synthesis of dimethylhexane -1,6-dicarbamate(HDC) from 1,6-hexamethylenediamine(HDA) and methyl carbonate(MC). Lead dioxide showed excellent catalytic activity, 100% HDA conversion and 93% HDC yield could be achieved at 463K for 6h. The effects of reaction temperature, reaction time and catalyst amount on the yield of HDC were investigated in details.

scholarly journals Optimization of the epoxidation of linseed oil using response surface methodology

2018 ◽  
Vol 24 (4) ◽  
pp. 357-368 ◽  
Author(s):  
Olga Govedarica ◽  
Milovan Jankovic ◽  
Snezana Sinadinovic-Fiser ◽  
Dragan Govedarica
Keyword(s):  
Hydrogen Peroxide ◽  
Response Surface Methodology ◽  
Reaction Time ◽  
Response Surface ◽  
Linseed Oil ◽  
Batch Process ◽  
Ion Exchange Resin ◽  
Coefficient Of Determination ◽  
Process Conditions ◽  
Catalyst Amount

Epoxidized vegetable oils are widely used in the chemical industry. Their production requires the optimization of process conditions to maximize the epoxy yield. Therefore, the epoxidation of linseed oil with peracetic acid generated in situ in the presence of an ion exchange resin as a catalyst was optimized using response surface methodology combined with Box-Behnken design. The effects of temperature (65?85?C), hydrogen peroxide-to-oil unsaturation mole ratio (1.1:1?1.5:1), catalyst amount (10?20 wt.%), and reaction time (5?13 h) on the epoxy yield were studied. According to analysis of variance, the developed regression model was significant with a coefficient of determination (R2) of 98.95%. Temperature of 70.6?C, hydrogen peroxide-to-oil unsaturation mole ratio of 1.5:1, catalyst amount of 20 wt.%, and reaction time of 7 h were determined as the optimal process conditions using the model. At these conditions, a relative epoxy yield of 84.73?0.07% was achieved, which agreed closely with the predicted value of 87.60%. The epoxidized linseed oil with high epoxy oxygen content (8.27?0.01%) and low iodine number (4.22?0.49 g iodine/100 g oil) was obtained approximately isothermally in a batch process and under relatively mild and safe conditions.

scholarly journals Using Fenton Oxidation Method to Advanced Treatment of Landfill Leachate

2015 ◽  
Vol 9 (1) ◽  
pp. 58-61 ◽  
Author(s):  
Gao Yanjiao ◽  
Huang Runzhu ◽  
Song Tiehong
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Time ◽  
Landfill Leachate ◽  
Ferrous Sulfate ◽  
Ph Value ◽  
Removal Rate ◽  
Advanced Treatment ◽  
Test Results ◽  
Optimal Conditions ◽  
Optimal Reaction

Hydrogen peroxide and ferrous sulfate were used to advanced treatment of landfill leachate effluent from biochemical tanks. Some influences on removing COD and chroma including the pH value of solution, the dosage of ferrous sulfate, the dosage of hydrogen peroxide and reaction time were investigated. The test results showed that for removal of COD and chroma the optimal pH was 3.0, the best ferrous sulfate and hydrogen peroxide dosage was 1500mg/L, 20mL/L respectively, and the optimal reaction time was 60min. Under optimal conditions, COD and chroma removal rate could reach 79.7% and 95.2% respectively.

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