AROMATICS EXTRACTION FROM HYDROCARBON OIL USING TETRAMETHYLENE SULFOXIDE

摘要

Aromatic hydrocarbons are selectively extracted from lube oil stocks comprising mixtures of same with non-aromatic hydrocarbons using tetramethyl sulfoxide as the extraction solvent. The oils so extracted are the heavier oils, those boiling above about 200 °C and identified as being at least lube base stock grade 60N and higher.