Research Article
Regeneration of Spent Lubricant Refining Clays by Solvent Extraction
Table 6
Characterization of regenerated clay.
| Items | Fresh clay | Regenerated clay |
| Surface area, m2/g | 219.6 | 150.5 | Color number of unrefined oil | 3.0 | 3.0 | Clay dosage used, wt% | 5.0 | 5.0 | Color number of refined oil | 2.0 | 2.0 |
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