Research Article
Optimized Liquid-Liquid Extractive Rerefining of Spent Lubricants
Table 5
Experimental validation of optimized extraction responses.
| ā | Predicted sludge yield (%) | Experimental sludge yield (%) | Absolute relative error (%) |
| Extraction with alcohol | 8.91 | 8.30 | 7.35 | Extraction with ketone | 3.52 | 3.23 | 9.03 |
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