Evaluation Study Of Inhibition And Regeneration Characters For Substituted Anilines Extracted From Crude Oil
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 cm1, 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).
 Barnes, A. M., Bartle, K. D., and Thibon, V. R. A., 2001, "A Review of Zinc Dialkyldithiophosphates): Characterization and Role in the Lubricating Oil, "Tribology International, 34 (6) pp. 389-395.
 Stachowiak, G., and Batchelor, A.W., 2005, "Engineering Tribology," Elsvier BUTTERWORTH HEINEMANN, pp. 832.
 Bhushan, B., 2000, "Modern Tribology Handbook, Volume 1," C R C Press LLC, United States of America, pp. 1760.
 Vrana, G., 2001, "Analytic Technology: Diagnose what Ails Your Auto," Electronics Design, Strategy, News, pp. 37-42.
 Khorramian, B. A., Iyer, G. R., Kodali, S., 1993, "Review of Antiwear Additives forCrankcase Oils," Wear, 169 (1) pp. 87-95.
 Spikes, H. A., 2004, "The History and Mechanisms of antioxidants," Tribology Letters, 17(3) pp. 469-489.
 Reyes-Gavilan, J. L., and Odorisio, P., 2001, "A Review of the Mechanisms of Action of Antioxidants, Metal Deactivators, and Corrosion Inhibitors," NLGI Spokesman, 64 (11) pp. 22-33.
 Denisov, E.T., Liquid Phase Reactions Rate Constants, Plenum press, New York, (2000), P. 211.
 Mahoney, L. R., 1969, "Antioxidants," Chemistry International, 8(8) pp. 547-547-555.
 Willermet, P. A., Carter, R. O.,III, and Boulos, E. N., 1992, "Lubricant-Derived Tribochemical Films-an Infra-Red Spectroscopic Study," Tribology International, 25(6) pp. 371-371-380.
 Vipper, A. B., Zadko, I. I., Ermolaev, M. V., 2002, "Engine Oil Ageing Under Laboratory Conditions," Lubrication Science, 14(3) pp. 363-375.
 Kumar, S., Mishra, N. M., and Mukherjee, P. S., 2005, "Additives Depletion and Engine Oil Condition a Case Study," Industrial Lubrication and Tribology, 57(2) pp. 69-72.
 Jefferies, A., and Ameye, J., 1998, "RULERTM and used Engine Oil Analysis Programs(c)," Lubrication Engineering, 54(5) pp. 29-34.
 Denisov, E. T., G. I. Kovalev. Oxidation and stabilization of jet fuels.M. Khimia (1993), P. 155, p. 32.