Process for making high octane gasoline

Claim 1

A PROCESS FOR THE PRODUCTION OF A HIGH OCTANE NUMBER AVIATION FUEL BLENDING STOCK FROM A LIGHT GASOLINE TO FRACTIONAL DISTILLATIO TO SEPARATE SAME INTO AT LEAST ONE PENTANE CUT AND A RATE SAME INTO AT LEAST ONE ENTANE CUT AND A HEAVIER CUT CONTAINING ANY CYCLOPENTANE PRESENT IN THE SAID LIGHT GASOLINE TOGETHER WITH C6 AND IN THE SAID LIGHT GASOLINE TOGETHER WITH C6 AND A C5+ CUT, SUBJECTING SAID C6+ CUT TO LIQUIDS LIQUID SOLVENT EXTRACTION WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF AQUEOUS METHANOL AND AQUEOUS AETONITRILE UNDER CONDITIONS SELECTIVELY DISSOLVING IN SAID SOLVENT CYCLIC HYDROCARBONS PRESENT IN SAID CUT, SEPARATING FROM SAID LIQUID-LIQUID SOLVENT EXTRACTION A CYCLIC-POOR RAFFINATE PHASE AND ACYCLIC-RICH EXTRACT PHASE, SUBJECTING SIAD EXTRACT PHASE IN A SECOND STEP TO LIQUID-LIQUID CONTACTING WITH A HYDROCARBON WASHING LIQUID AT LEAST PARTIALLY COMPOSED AT SAID PENTANE CUT UNDE CONDITIONS FORMING A CYCLIC-POOR SOLVENT PHASE AND A CYCLIE-RICH HYDROCARBON PHASE, AND RECYCLING SAID SOLVENT PHASE TO THE FIRST NAMED LIQUID SOLVENT EXTRACTION STEP AS SOLVENT THEREFOR, AT LEAST THE CYCLIC HYDROCARBON CONTENT OF SAID LAST NAMED CYCLIC-RICH HYDROCRON PHASE FROM SAID SECOND LIQUID-LIQUID CONTACTING STEP COMPRISING THE AFORESAID HIGH OCTANE NUMBER AVIATION FUEL BLENDING COMPONENT PRODUCT OF THE PROCESS.