Used Oil Solvent Extraction Technology (1995)

Summary:

Solvent extraction was studied for its potential to upgrade used oils. Low temperature distillation, (current technology), cannot significantly reduce ash and other residues in used oil. Highly sophisticated technologies are not economical or safe for small-scale operations. This project describes and diagrams a preliminary design for using solvent extraction to produce an improved oil product, at a scale and simplicity of operation consistent with the used oil recycling industry
The oil product output appeared suitable for blending with higher value fuel oils and with lubricating stock. Construction of a pilot scale solvent treatment plant would be required to refine and validate the technology.