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Quality Improvement of Spent Lubricating Oil | ||
| Iraqi Journal of Chemical and Petroleum Engineering | ||
| Article 1, Volume 8, Issue 3, 2007, Pages 31-35 | ||
| Authors | ||
| Huda M. Hassan; Dhia El-Din M. Kassim; Abdul-Hlalim A. K. Mohammed | ||
| Abstract | ||
| The acidity of spent lubricant was treated using sodium hydroxide solution. The effect of three variables on the treatment have been studied. These are mixing time ranging from 5-35 minutes, NaOH to lubricant weight ratio ranging from 0.25-1.25 and weight percentage of NaoH ranging from 2.6%. The experimental design of Box-Wilson method is adopted to find a useful relationship between the three controllable variables and the lowering in the acidity of the spent lubricant. Then the effective variables and interactions are identified using the statistical analysis(F-test) of three variable fractional design. The mathematical model is well represented by a second order polynomial. By the analisys of the experimental results, the best treatment conditions which achieved an acceptable acidity of the spent lubricant are 20 minutes mixing time, I weight ratio of NaOH to spent lubricant and 4.5 weight percentage of NaOH. At these condition the acidity of the lubricant decreases from 0.62 to 0.0602mg KOH/g oil. | ||
| Keywords | ||
| lubricating oil | ||
|
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