Process for preparing jet fuels

Claim 1

THE PROCESS FOR PREPARNG A JET FUEL WHICH COMPRISES CONTACTING A PETROLEUM DISTILLATE HAVING A FREEZING POINT BELOW ABOUT -45*F., A VISCOSITY AT -40*F. BELOW ABOUT 15 CENTISTOKES, WHICH INCLUDES SUBSTANTIAL AMOUNTS OF HYDROCARBONS BOILING IN THE RANGE BETWEEN ABOUT 250 AND 550*F. WHICH ARE COMPOSED PREDOMINANTLY OF A MEMBER OF THE GROUP CONSISTING OF PARAFINIC AND NAPHTHENIC HYDROCARBONS, WITH THE HYDROGEN IN THE PRESENCE OF A HYDROREFINING CATALYST AT A TEMPERATURE BETWEEN ABOUT 500 AND 800*F. AT A PRESSURE BETWEEN ABOUT 100 AND 2000 P.S.I.G. AND AT A LIQUID HOURLY SPACE VELOCITY BETWEEN ABOUT 0.2 AND 10, SAID REACTION CONDITIONS BEING SELECTED WITHIN THE SPECIFIED RANGES TO RESULT IN THE HYDROGENATION OF THE GUM-FORMING MATERIALS PRESENT IN THE FEED STOCK WITHOUT SUBSTANTIAL CONVERSION OF THE PETROLEUM DISTILLATE INTO LOWER BOILING HYDROCARBONS, AND WITHOUT SUBSTANTIAL SATURATION OF AROMATIC COMPOUNDS, EXTRACTING DEPOSIT-INDUCING SUBSTANCES FROM THE HYDROGENATED PRODUCT WITH A SOLVENT SELECTED FROM TEH GROUP CONSITING OF FURFURAL, DIETHYLENE GLYCOL, DIMETHYL SULFOXIDE, ACETONITRILE, AND SULFUR DIOXIDE, AND RECOVERING A JET FUEL FROM THE RAFFINATE.