Oxidation of hydrocarbons with dioxygen via peroxide intermediates

Кузнецова, Н. И.; Кузнецова, Л. И.; Кириллова, Н. В.; Detusheva, L. G.; Likholobov, V. A.; Khramov, M. I.; Ansel, J.-E.

doi:10.1007/s10975-005-0068-x

Cited by 25 publications

(24 citation statements)

References 21 publications

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“…5). These three peaks were found to correspond to cis-and trans-stilbene (2) and benzil (3). We believe that these observations can be accounted for by a variant of the mechanism that Perkel et al 19 suggested for the formation of 1 (Fig.…”

Section: Interaction Between Aldehydes and Tppmentioning

confidence: 52%

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Determination of Hydroperoxide Content in Complex Hydrocarbon Mixtures by Gas Chromatography/Mass Spectrometry

2009

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A known principle in which triphenylphosphine is allowed to be oxidized by hydroperoxides to triphenylphosphine oxide, was developed into an analytical method for determination of hydroperoxide content in light mineral oils using GCMSdetection and quantification. By suitable choice of reagent solution solvents and internal standard, the method proved to be simple to apply and very rugged. For a series of oven-aged oil samples the developed method gave results with a satisfactory correlation to an established iodometric method (which also gave a higher standard deviation). A mechanistic explanation for interference of high concentrations of added aldehydes on measurements was also suggested, but it was found that the interference is of no practical consequence for oxidized oil samples.

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Section: Interaction Between Aldehydes and Tppmentioning

confidence: 52%

“…autooxidation by atmospheric oxygen mediated by radical chain reactions of organic peroxides. [1][2][3] To control and prevent this destructive effect is important both in technical applications of hydrocarbon liquids (e.g. lubricants) 4 and in food preparations containing lipids of biological origin.…”

Section: Introductionmentioning

confidence: 99%

Determination of Hydroperoxide Content in Complex Hydrocarbon Mixtures by Gas Chromatography/Mass Spectrometry

2009

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“…The reported promotion of reactions using H 2 in the presence of O 2 over Pt or Pd catalysts has been suggested as resulting from formation of hydroperoxide species [2,4] or activated oxygen [5]. At present, the mechanism of promotion of DMF oxidative decomposition by H 2 addition is not clear, but it may be due to such intermediates.…”

Section: Methodsmentioning

confidence: 99%

“…In the present work, we evaluated catalysts appropriate for DMF decomposition and also investigated the effect of H 2 addition to the feed on the activity. Although a typical reductant, H 2 is known to promote some catalytic oxidation processes, e.g., liquid phase oxidation of cyclohexane over Pt mixed with heteropoly compounds [2], and partial oxidation of benzene to phenol over Pt-and Pd-VOx/SiO 2 [3], Pd-Fe zeolite [4] and Pd membrane [5]. The addition of H 2 in these cases increased the object reaction rates while simultaneously suppressing over-oxidation.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Decomposition of N,N'-Dimethylformamide over Pt Catalysts with H2 Addition to the Feed

et al. 2004

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“…The oxidations of oils, reaction mechanism and reaction products have been subject of a number of previous studies. [13][14][15][16] The present study was aimed to understand the infl uence of long-term oxidation of coconut and soy bean oil on their boundary lubrication property. In this study, to induce oxidation, oils were stored at an elevated temperature in an oven under dark conditions to avoid the infl uence of photooxidation.…”

Section: Introductionmentioning

confidence: 99%

Studies on boundary lubrication properties of oxidised coconut and soy bean oils

Mannekote

Kailas

2009

Lubrication Science

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Vegetable oils are a potential source of base oils for biodegradable lubricants, with limited oxidative stability. This study focuses on the effect of long-term ageing and the infl uence of oxidation products on the boundary lubrication performance of coconut and soy bean oils, by subjecting them to accelerated ageing in a dark oven at elevated temperature. The samples were collected at regular intervals and analysed for the changes in viscosity, percentage of free fatty acid and peroxide number compared to fresh oil samples. The boundary lubrication properties of these samples were evaluated using a four-ball tester. Increased wear observed with aged oil samples was linked to the destruction of triglyceride structure and formation of peroxides. The difference in the wear properties of soy bean oil to coconut oil was accounted by its high content of unsaturated fatty acids and its susceptibility to undergo oxidation. It was concluded that the coconut oil can perform as a better lubricant and has got a better storage life compared to soy bean oil.

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Oxidation of hydrocarbons with dioxygen via peroxide intermediates

Cited by 25 publications

References 21 publications

Determination of Hydroperoxide Content in Complex Hydrocarbon Mixtures by Gas Chromatography/Mass Spectrometry

Determination of Hydroperoxide Content in Complex Hydrocarbon Mixtures by Gas Chromatography/Mass Spectrometry

Oxidative Decomposition of N,N'-Dimethylformamide over Pt Catalysts with H2 Addition to the Feed

Studies on boundary lubrication properties of oxidised coconut and soy bean oils

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