Combination deasphalting, phenol treating, and dewaxing process

Claim 1

PROCESS FOR THE PRODUCTION OF A HIGH QUALITY LUBRICATING OIL FROM A WAX BEARING DISTILLATE HYDROCARBON OIL AND A RESIDUUM OIL CONTAINING ASPHALTIC CONSTITUENTS WHICH COMPRISES INTRODUCING THE DISTILLATE OIL INTO THE CENTER AREA OF AN EXTRACTION-TREATER ZONE, INTRODUCING THE RESIDUUM OIL INTO THE EXTRACTION-TREATER ZONE BELOW THE POINT OF INTRODUCTION OF THE DISTILLATE OIL, INTRODUCING A SOLVENT HAVING A PREFERENTIAL SELECTIVITY FOR THE MORE AROMATIC TYPE CONSTITUENTS AS COMPARED TO THE MORE PARAFFINIC TYPE CONSTITUENTS INTO THE UPPER AREA OF SAID EXTRACTION-TREATER ZONE, INTRODUCING A DEASPHALTING SOLVENT INTO SAID EXTRACTION-TREATER ZONE BELOW THE POINT OF INTRODUCTION OF SAID RESIDUUM OIL, WITHDRAWING A SOLVENT EXTRACT PHASE FROM THE BOTTOM OF SAID EXTRACTION-TREATER ZONE, WITHDRAWING A RAFFINATE PHASE COMPRISING PARAFFINIC TYPE CONSTITUENTS FROM THE TOP OF SAID EXTRACTION TREATER ZONE AND HANDLING SAID RAFFINATE PHASE TO SEPARATE A LUBRICATING OIL PHASE AND A WAXY PHASE, INTRODUCING SAID SOLVENT EXTRACT PHASE INTO A SOLVENT FRACTIONATING ZONE, REMOVING A SOLVENT FREE EXTRACT PHASE FROM THE BOTTOM OF SAID SOLVENT FRACTIONATING ZONE, REMOVING THE SOLVENT HAVING A PREFERENTIAL SELECTIVITY FOR AROMATIC TYPE CONSTITUENTS FROM AN INTERMEDIATE POINT OF SAID SOLVENT FRACTIONATING ZONE AND REMOVING SAID DEASPHALTING SOLVENT FROM THE TOP OF SAID SOLVENT FRACTIONATING ZONE AND INTRODUCING A PORTION OF SAID DEASPHALTING SOLVENT INTO THE LOWER SECTION OF A SECONDARY SOLVENT REMOVAL ZONE, INTRODUCING SAID LUBRICATING OIL PHASE INTO AN INITIAL SOLVENT SEPARATION ZONE WHEREIN THE MAJORITY OF SAID DEASPHALTING SOLVENT IS SEPARATED THEREFROM, WITHDRAWING SAID LUBRICATING OIL PHASE FROM SAID INITIAL SOLVENT SEPARATION ZONE AND INTRODUCING THE SAME INTO SAID SECONDARY SOLVENT REMOVAL ZONE AT A POINT ABOVE THE POINT OF INTRODUCTION OF SAID DEASPHALTING SOLVENT, WHEREIN SAID LUBRICATING OIL PHASE IS TREATED IN A MANNER TO REMOVE THE REMAINDER OF SAID DEASPHALTING SOLVENT AND ALL OF SAID SOLVENT HAVING A PREFERENTIAL SELECTIVITY FOR AROMATIC TYPE CONSTITUENTS AS A SOLVENT MIXTURE, PASSING SAID SOLVENT MIXTURE INTO SAID SOLVENT FRACTIONATING ZONE AND SEGREGATING THE RESPECTIVE SOLVENTS FROM EACH OTHER.