Jet combustion fuel

Claim 1

A JET COMBUSTION FUEL CONSISTING ESSENTIALLY OF A HYDROCRACKED DISTILLATE HYDROCARBON FRACTION PREPARED BY HYDROCRACKING A HYDROCARBON FRACTION WITH AN INITIAL BOILING POINT OF AT LEAST ABOUT 400*F. AND AN END BOILING POINT OF AT LEAST ABOUT 600*F. IN THE PRESENCE OF HYDROGEN OVER A CATALYST CONTAINING 0.1 TO 5 PERCENT OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF METALS HAVING ATOMIC NUMBERS OF 44 TO 46, INCLUSIVE, AND 76 TO 78, INCLUSIVE, DEPOSITED UPON A SOLID REFRACTORY SUPPORT HAVING AN ACTIVITY INDEX OF AT LEAST ABOUT 25 AT A TEMPERATURE BETWEEN ABOUT 500*F. AND ABOUT 825*F., A HYDROGEN PRESSURE OF ABOUT 500 P.S.I.G. TO ABOUT 2500 P.S.I.G. AND A HYDROGEN-TO HYDROCARBON MOLE RATIO OF ABOUT 2 TO ABOUT 80 SUCH THAT THE CRACKING LEVEL IS AT LEAST ABOUT 20 VOLUME PERCENT PER PASS, AND SEPARATING FROM THE HYDROCRACKED PRODUCT A JET COMBUSTION FUEL HAVING AN INTIAL BOILING POINT FALLING WITHIN THE RANGE VARYING BETWEEN ABOUT 200*F. AND ABOUT 400*F., A 50 PERCENTPOINT OF AT LEAST ABOUT 325*F., AND AN END BOILING POINT FALLING WITHIN THE RANGE VARYING BETWEEN ABOUT 450*F. AND ABOUT 600*F., AND WHICH BOILS SUBSTANTIALLY CONTINUOUSLY BETWEEN SAID INITIAL BOILING AND SAID END BOILING POINT OVER A BOILING RANGE-EXTENDING AT LEAST 75 DEGREES ON THE FAHRENHEIT SCALE; AND WHICH HAS ALL THE FOLLOWING CHARACTERISTICS: (A) AN ANILINE-GRAVITY PRODUCT OF AT LEAST ABOUT 7000; (B) A TOTAL SULFUR CONTENT OF LESS THAN ABOUT 0.04 PERCENT, BY WEIGHT; (C) A MERCAPTAN SULFUR CONTENT OF LESS THAN ABOUT 0.0005 PERCENT, BY WEIGHT; (D) A SMOKE POINT OF AT LEAST ABOUT 30; (E) A RATE OF CHARGE IN A.P.I. GRAVITY OF LESS THAN ABOUT 4* PER 100*F. CHANGE IN THE 50 PERCENT-POINT; (F) A FREEZING POINT THAT IS LOWER THAN THE VALUE DETERMINED BY THE FORMULA: 0.423 (MID-BOILING POINT IN *F.)-226; AND (G) A HERMAL STABILITY SUCH THAT WHEN UNINHIBITED IT WILL PASS A TEST THEREFORE EQUIVALENT TO THE ERDCO COKER TEST WITH A PRESSURE DROP EQUIVALENT TO LESS THAN 25 INCHES OF MERCURY ACROSS THE FILTER AFTER 300 MINUTES.