Extraction of polynuclear aromatic materials

Claim 1

A METHOD OF EXTRACTING AROMATIC MATERIAL FROM MIXTURES CONTAINING AROMATIC AND PARAFFINIC MATERIAL WHICH COMPRISES CONTACTING A LIQUID MIXTURE COMPRISING PARAFFINIC MATERIAL AND AROMATIC MATERIAL WITH TWO SUBSTANTIALLY IMMISCIBLE LIQUID SOLVENTS TO OBTAIN A LIQUID TWO-PHASE MIXTURE SEPARABLE INTO A FIRST LIQUID PHASE AND A SECOND LIQUID PHASE, ONE OF THE AFORESAID LIQUID SUBSTANTIALLY IMMISCIBLE SOLVENTS BEING A SOLVENT FOR PARAFFINIC MATERIAL AND THE OTHER OF THE AFORESAID LIQUID SUBSTANTIALLY IMMISCIBLE SOLVENTS BEING A LIQUID ASPHALTIC TAR CONTAINING BY VOLUME ABOUT 10 TO ABOUT 60 PERCENT SOFT POLYNUCLEAR AROMATIC RESIN, ABOUT 10 TO ABOUT 50 PERCENT OF HARD RESIN, ABOUT 5 TO ABOUT 50 PERCENT OF POLYNUCLEAR AROMATIC OIL, UP TO ABOUT 25 PERCENT OF ASPHALTENES, BALANCE TO MAKE 100 PERCENT PREDOMINANTLY PARAFFINIC MATERIAL, AND THE AMOUNT OF HARD RESIN PLUS ASPHALTENES BEING ABOUT 25 TO ABOUT 55 PERCENT, SEPERATING THE AFORESAID LIQUID TWO-PHASE MIXTURE INTO A FIRST LIQUID PHASE COMPRISING THE AFORESAID LIQUID SOLVENT FOR PARAFFINIC MATERIAL AND EXTRACTED PARAFFINIC MATERIAL AND A SECOND LIQUID PHASE COMPRISING THE AFORESAID LIQUID ASPHALTIC TAR AND EXTRACTED AROMATIC MATERIAL, AND SEPARATING LIQUID SOLVENT FOR PARAFFINIC MATERIAL FROM EXTRACTED PARAFFINIC MATERIAL.

Claim 2

A METHOD OF EXTRACTING AROMATIC MATERIAL FROM MIXTURES CONTAINING AROMATIC AND PARAFFINIC MATERIAL WHICH COMPRISES CONTACTING A LIQUID MIXTURE COMPRISING PARAFFINIC MATERIAL AND AROMATIC MATERIAL WITH TWO SUBSTANTIALLY IMMISCIBLE LIQUID SOLVENTS TO OBTAIN A LIQUID TWO-PHASE MIXTURE SEPARABLE INTO A FIRST LIQUID PHASE AND A SECOND LIQUID PHASE, ONE OF THE AFORESAID LIQUID SUBSTANTIALLY IMMISCIBLE SOLVENTS BEING A SOLVENT FOR PARAFFINIC MATERIAL AND THE OTHER OF THE AFORESAID LIQUID SUBSTANTIALLY IMMISCIBLE SOLVENTS BEING A LIQUID ASPHALTIC TAR CONTAINING BY VOLUME ABOUT 10 TO ABOUT 60 PERCENT SOFT POLYNUCLEAR AROMATIC RESIN, ABOUT 10 TO ABOUT 50 PERCENT OF HARD RESIN, ABOUT 5 TO ABOUT 50 PERCENT OF POLYNUCLEAR AROMATIC OIL, UP TO ABOUT 25 PERCENT OF ASPHALTENES, BALANCE TO MAKE 100 PERCENT PREDOMINANTLY PARAFFINIC MATERIAL, AND THE AMOUNT OF HARD RESIN PLUS ASPHALTENES BEING ABOUT 25 TO ABOUT 55 PERCENT, SEPERATING THE AFORESAID LIQUID TWO-PHASE MIXTURE INTO A FIRST LIQUID PHASE COMPRISING THE AFORESAID LIQUID SOLVENT FOR PARAFFINIC MATERIAL AND EXTRACTED PARAFFINIC MATERIAL AND A SECOND LIQUID PHASE COMPRISING THE AFORESAID LIQUID ASPHALTIC TAR AND EXTRACTED AROMATIC MATERIAL, AND SEPARATING LIQUID SOLVENT FOR PARAFFINIC MATERIAL FROM EXTRACTED PARAFFINIC MATERIAL.