Interrelated Effects of Oil Components on Oxidation Stability

Jezl, James; Stuart, Archibald; Schneider, Abraham

doi:10.1021/ie50582a045

Cited by 10 publications

(3 citation statements)

References 4 publications

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“…Sulfur and phosphorous compound inhibitors prevent the formation of new free radicals. Sulfur compounds can also improve oxidation stability of lubricating oil and some of them are considered natural antioxidants in lubricating oil (Jezl and Stuart, 1958;Matsunaga, 1985;Angelo, 2002). The oxidation resistance of sulfur compounds differs with molecular structure (Morrison and Boyd, 1987).…”

Section: Introductionmentioning

confidence: 99%

The Oxidation Stability of Lubricating Oil

Eissa

Basta

Ibrahim

2010

Petroleum Science and Technology

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Lubricating oil is generated throughout the year and collected in central locations in many communities. The studied lube oil has a boiling range of 280 ı C-400 ı C, and its physical properties were determined according to standard test methods in ASTM and International Petroleum. Solvent extraction by furfural was carried out using different feed ratios. The best ratio was 1:4 (sample:furfural). The oil was separated into its components using liquid column chromatography. It was found that the aromatic contents decreased. The structure group analysis was determined by infrared spectroscopy and refractive index-density-molecular weight methods. The oxidation stability was carried out according to ASTM method D-48 using an inhibitor. The inhibitor used was a nonionic surfactant, alkanolamide. The results showed that the oxidation stability improved using the inhibitor.

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Section: Introductionmentioning

confidence: 99%

The Oxidation Stability of Lubricating Oil

Eissa

Basta

Ibrahim

2010

Petroleum Science and Technology

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“…Unfortunately, it suffers from the shortcoming that it is discolored intensely when exposed to ultraviolet radiation or sunlight (Jezl et al, 1958;Denison and Condit, 1949), so it cannot meet stringent color requirements of advanced white industrial products, which, consequently, lessens its commercial value. Therefore, it is very necessary to study its light oxidative mechanism so as to find effective means to overcome such a disadvantage.…”

Section: Introductionmentioning

confidence: 99%

Study on Light Oxidative Mechanism of Hydro-treated Naphthenic Lube Base Oil under Ultraviolet Radiation

Han

Cheng²,

Ma³

et al. 2010

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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In this article, taking use of KN4010 as base stock, iodometry and infrared spectroscopy were carried out to monitor its change of peroxide value and oxygencontaining compounds against time under ultraviolet radiation, and oxidative mechanism of hydrotreated lube base oil was investigated in detail. The results of this test indicate that its light oxidative mechanism conforms to the radical reaction theory that is in the medium oxidative stage. Test of peroxide value confirms that the oil sample is very sensitive to ultraviolet radiation. The contents of carbonyl compounds and hydroxyl compounds show a decreased trend and the content of hydroxyl compounds are almost unchangeable under ultraviolet radiation. No organic acid and ester is found under the oxidative process.

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“…In particular, oxidation stability is greatly affected by the amounts and composition of sulfur compounds in the oil. Sulfur compounds can improve the oxidation stability of lubricating oil, and some of them are considered natural antioxidants . Alkylthiols and disulfides have been found to reduce the rate of autoxidation of dodecane, and there was a long induction period in the formation of gum.…”

Section: Introductionmentioning

confidence: 99%

Distribution of Thioethers in Hydrotreated Transformer Base Oil by Oxidation and ICP-AES Analysis

Qiu

Han

Cheng

et al. 2005

Ind. Eng. Chem. Res.

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A method was developed to analyze the distribution of thioether compounds in model sulfur compounds by oxidation and ICP-AES analysis and then applied to analyze hydrotreated base oil. Model thioethers were oxidized to the corresponding sulfoxides by tetrabutylammonium periodate and sodium metaperiodate, and the reduced periodate was quantitatively precipitated in the form of silver iodate. The silver iodate was transformed to AgNO 3 after calcination and the addition of concentrated nitric acid. The concentration of Ag + was determined by ICP-AES, and the concentration of thioethers was calculated with a relational equation. Aliphatic thioethers could be oxidized to sulfoxides under reflux by tetrabutylammonium periodate, and all thioethers could be oxidized to sulfoxides under reflux by sodium metaperiodate, and then the contents of aliphatic thioethers and total thioethers were determined in sample oil. The thioethers in Kelamayi hydrotreated transformer base oil were analyzed by the same method. Research indicated that this method has a high sensitivity and good selectivity.

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Interrelated Effects of Oil Components on Oxidation Stability

Cited by 10 publications

References 4 publications

The Oxidation Stability of Lubricating Oil

The Oxidation Stability of Lubricating Oil

Study on Light Oxidative Mechanism of Hydro-treated Naphthenic Lube Base Oil under Ultraviolet Radiation

Distribution of Thioethers in Hydrotreated Transformer Base Oil by Oxidation and ICP-AES Analysis

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