Re-refining Used Engine Oil in Ghana Using Solvent Extraction and Acid-Clay Treatment

Table 2

Properties of the used engine oil and re-refined oils from this work.

Oil	Properties
	Density (g/cm^3)	Pour point (°C)	TAN (mg KOH/g)	Viscosity index
UEO	0.842	−27	8.783	129.61
CA	0.868	−8.5	2.259	129.94
CM	0.855	−7.4	1.801	115.21
CN	0.849	−8.0	2.145	138.03
NA	0.884	−9.1	3.961	123.37
NM	0.880	−9.4	2.228	106.26
NN	0.869	−9.0	1.531	102.8
SA	0.854	−7.0	1.311	97.266
SM	0.881	−6.1	2.066	94.045
SN	0.867	−7.2	0.969	93.105
TBE	0.882	−7.1	3.176	168.01
TBI	0.871	−8.2	1.608	119.8
TBM	0.898	−9.0	4.676	148.06

Density measurements were taken at 25°C.