Extraction of aromatic from lube oil using a surfactant as an additive

Investigating the Effect of NMP/Phenol Solvent Blend on Lubricating Oil Properties Without/With Using Surfactant.

“…Surfactant as an additive in solvent extraction of lubricating oil was studied in [15]. It was found that the addition of surfactant enhanced the extraction of polyaromatic compounds and increased solvent selectivity [16][17]. Furfural performance was improved by the addition of 0.01 to 0.1 wt.% sodium lauryl ether sulfate (SLES) at optimum extraction temperature of 70 o C and an increase in the yield was observed [16][17].…”