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The refining of lubricating oils from waste lubricating oil was examined utilizing a novel blend of solvent extraction and activated alumina adsorbent. The activity of these solvent extraction blends toluene, butanol and methanol (A), toluene, butanol and ethanol (B) and toluene, butanol and isopropanol (C) was evaluated experimentally, oil to solvent proportions from 1: 1 to 1: 3 were analyzed for mixture blend (C). The results confirm solvent mixture (A) gave good efficiency with the highest percent sludge removal. The maximum percent of sludge removal improves with the increase of solvent to oil ratios. The physical properties of the recycle oil were measured. The results show the change in the properties of recycling oil and have good efficiency.
Osman et al. (Fri,) studied this question.
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