Process for regenerating lubricating oils
AssigneeInstitut Francais du Petrole
InventorsRene Avrillon, Daniel Defives
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Abstract
Used lubricating oil is contacted with particles of a solid adsorption resin comprising at least 0.1 cc per gram of pores of diameter in the range of 6 to 300 angstroms. The resin is preferably a porous polycondensate or cross-linked copolymer comprising pyridyl or hydroxy groups, for example a polycondensate of phenol and formaldehyde. The resin may be reactivated by rinsing with an organic solvent such as an alcohol, a ketone or a chlorinated hydrocarbon.
Claims16
A process for regenerating a used lubricating oil, comprising contacting the oil with particles of a solid adsorption resin comprising at least 0.1 cc per gram of pores of a diameter in the range from 6 to 300 angstroms, said resin being a porous polycondensate or cross-linked copolymer comprising (a) hydroxy groups linked directly or through a --CH.sub.2 -- or ##STR2## group to a benzene ring, or (b) pyridyl groups, said contacting being conducted at a temperature wherein the resin is stable.
Dependencies are inferred from the claim text.