Stabilization of thermally unstable liquid hydrocarbon fuels

Claim 1

A FUEL COMPOSITION COMPRISING A MAJOR AMOUNT OF A NORMALLY THERMALLY UNSTABLE LIQUID HYDROCARBON COMBUSTION GAS TURBINE FUEL AND A SMALL AMOUNT, SUFFICIENT TO IMPROVE THE THERMAL STABILITY OF SAID FUEL, OF A COMBINATION OF (A) A MONOESTER OF A FATTY ACID CONTAINING 8 TO 18 CARBON ATOMS PER MOLECULAR WEIGHT OF ABOUT 166 TO 462, AND (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF (1) AN ANTICLOGGING, OIL-SOLUBLE PHOSPHOSULFURIZED ALIPHATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF PARAFFINS, OLEFINS, AND OLEFIN POLYMERS HAVING MOLECULAR WEIGHTS IN THE RANGE OF ABOUT 50 TO 10,000 AND (2) AN OIL-SOLUBLE, NITROGEN-CONTAINING ANTICLOGGING COPOLYMER OF (I) A MONOMERIC, COPOLYMERIZABLE ALKYL ESTER OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ARCYLIC AND LOWER ALKACYLIC ACIDS WHOSE ALKYL ESTER SUBSTITUENT CONTAINS 8 TO 18 CARBON ATOMS, AND (II) A MONOMERIC COPOLYMERIZABLE UNSATURATED COMPOUND CONTAINING AN ETHYLENIC LINKAGE AS THE SOLE FUNCTIONAL GROUP THAT IS COPOLYMERIZABLE WITH THE AFORESAID MONOMERIX ALKYL ESTER AND HAVING A NITROGEN-CONTAINING SUBSTITUENT GROUP, SAID MONOMERIC COMPONENTS BEING PRESENT, RESPECTIVELY, IN THE COPOLYMER IN A WEIGHT RATIO OF ABOUT 0.03 TO 1:1, SAID SMALL AMOUNT COMPRISING AT LEAST ABOUT 2.5 POUNDS OF EACH MEMBER OF SAID COMBINATION PER THOUSAND BARRELS OF FUEL.