CPC Subgroup
C10G 21/28 Recovery of used solvent
Full Title
Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents (C10G17/00, C10G19/00 take precedence) > Recovery of used solvent
C10G 21/28 Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents (C10G17/00, C10G19/00 take precedence) > Recovery of used solvent