Regeneration of Spent Lubricant Refining Clays by Solvent Extraction

Table 6

Characterization of regenerated clay.

Items	Fresh clay	Regenerated clay
Surface area, m^2/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