Production of aviation gasoline

Claim 1

PROCESS FOR THE PRODUCTION OF 100/130 GRADE AVIATION GASOLINE WHICH COMPRISES (1) SEPARATING FROM A NAPHTHENIC STRAIGHT-RUN GASOLINE CONTAINING AT LEAST 40% BY WEIGHT NAPHTHENES BY FRACTIONAL DISTILLATION A LIGHT ENDS FRACTION BOILING UP TO ABOUT 65*C. AND A FRACTION HAVING A LOWER CUTTING POINT OF ABOUT 65*C AND AN UPPER CUTTING POINT OF ABOUT 130-140*C., (2) CATALYTICALLY REFORMING THE LATTER FRACTION BY CONTACTING IT WITH AN ACIDIC PLATINUM CATALYST UNDER A PRESSURE BETWEEN 2 AND 30 ATMOSPHERES AT A TEMPERATURE BETWEEN 450 AND 525*C., (3) BLENDING THE CATALYTIC REFORMATE THUS OBTAINED WITH THE SAID LIGHT ENDS FRACTION FROM THE STRAIGHTRUN GASOLINE, (4) STABILIZING THE CATALYIC REFORMATE/ STRAIGHT-RUN BLEND, AND (5) BLENDING THE STABILIZED PRODUCT THUS OBTAINED IN A AMOUNT AT LEAST 30% BY VOLUME OF THE FINISHED AVIATION GASOLINE WITH LESS THAN 50% BY VOLUME OF ALKYLATE, A MINOR AMOUNT OF ISOPENTANE SUFFICIENT TO MEET THE VOLATILITY REQUIREMENTS AND TETRAECTHYL LEAD IN PREMISSIBLE AMOUNTS, ANY ADDITIONAL COMPONENTS BEING PRESENT IN AN AMOUNT LESS THAN 20% BY VOLUME OF THE SAID STABILIZED PRODUCT.