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IJSTR >> Volume 4 - Issue 12, December 2015 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Evaluation Study Of Inhibition And Regeneration Characters For Substituted Anilines Extracted From Crude Oil

[Full Text]



Dr. Mohammad Jamil Abd-Alghani



Key words: Lubricant oil, induction period, Antioxidant, Inhibition.



Abstract: Aniline derivatives containing carbonyl group in the side chain was extracted from crude oil received from Al- Dora refinery. The crude oil was dissolved in xylene (1:3) and extracted through a column containing activated cationic resin type Amberlyte (15), then eluted by absolute ethanol and identified by infra red spectroscopy then examined as antioxidant for lubricant oil stock 50. FT-IR spectroscopy for the lubricant oil was performed before employing in an internal combustion engine and 190 hrs after. It was seen that the FT-IR of the oxidized oil contains a new peak in the region 1700– 1800 cm–1, which is formed due to the oxidation of base oil which belongs to carbonyl group. The FT-IR specter for the formulated crude oil with a specific concentration of the extracted substituted aniline after applying the same conditions of oxidation (190 working hrs. in an internal combustion engine) showed a minimum peak intensity at 1710 – 1770 cm-1 than that observed in FT-IR done in absence of extracted antioxidant. The values of induction periods in presence of (0.20 and 0.30) mol/l of the extracted sample in the lubricant oil at 393 K were: (766 sec. 1630 sec.), while in their absence was (55 sec.). The values of maximum rates of oxidation were: (3.0x10-4 and 2.0x10-4) mol/l. sec. These values were still not arrived the value of maximum rate of oxidation for the lubricant oil (3.5 x10-4) mol./l.sec. The same study was applied on the universal antioxidant inhibitor 2, 6-diter-butyl-4-methyl phenol (phenolic type) under the same conditions. The obtained induction periods were (150, 290 sec.) respectively. This means that the values of induction periods obtained by formulating the lubricant oil with the extracted aniline molecule were (7) times greater than do the 2, 6- diter-butyl-4-methyl phenol molecule. From the literatures, it is known that the value of stochiometric factor for inhibition (f) for 2, 4, 6-triisobutyl phenol is equal to (2) so, as a result, the value of stochiometric factor of inhibition (f) for the extracted sample will be equal to (7x2=14).



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