Processing low b.t.u. gas from natural gas

Claim 1

A PROCESS FOR PROCESSING A NITROGEN-RICH, SWEET NATURAL GAS STREAM BELOW THE STANDARD OF HEATING VALUE FOR SALE FOR HEATING PURPOSEES AND SIMULTANEOUSLY PROCESSING A SOUR FIELD GAS TO PRODUCE GASOLINE WHICH COMPRISES THE STEPS OF: (A) PASSING SAID NATURAL GAS THRU A FIRST INDIRECT HEAT EXCHANGE ZONE AT A PRESSURE IN THE RANGE OF 500-750 P.S.I.A. TO COOL SAME TO A TEMPERATURE BELOW 0*F; (B) FROM THE CHILLED GAS SEPARATING A FIRST CONDENSATE LEAN IN NITROGEN AND RICH IN NATURAL GASOLINE AND A FIRST UNCONDENSED GAS LEAN IN NATURAL GASOLINE AND RICH IN NITROGEN, METHANE, AND ETHANE; (C) PASSING THE UNCONDENSED GAS THRU A SECOND INDIRECT HEAT EXCHANGE ZONE TO FURTHER CHILL SAME; (D) EXPANDING THE CHILLED GAS FROM STEP (C) TO A PRESSURE IN THE SAME RANGE OF 200-400 P.S.I.A. TO FURTHER CHILL SAME; (E) FROM THE CHILLED GAS OF STEP (D), SEPARATING A SECOND CONDENSATE CONSISTING PREDOMINANTLY OF METHANE AND ETHANE AND A SECOND UNCONDENSED GAS CONSISTING PREDOMINANTLY OF NITROGEN, METHANE, AND ETHANE; (F) PASSING THE SECOND CONDENSATE AND THE SECOND UNCONDENSED GAS FROM STEP (E) SUBSTANTIALLY AT THEIR EXISTING PRESSURES, SEPARATELY AND SERIALLY THRU SECOND AND SAID FIRST HEAT EXCHANGE ZONES, SAID CONDENSATE AND SAID FIRST HEAT EXCHANGE ZONES, SAID CONDENSATE AND SAID GAS BEING THE SOLE COOLANTS IN SAID SECOND HEAT EXCHANGE ZONE; (G) EXPANDING SAID FIRST CONDENSATE TO CHILL SAME AND PASSING THE RESULTING FLUID THRU SAID FIRST HEAT EXCHANGE ZONE AS COOLANT; (H) PASSING SAID SOUR FIELD GAS TO A GASOLINE EXTRACTION PLANT TO EXTRACT GASOLINE THEREFROM, SAID PLANT UTILIZING FUEL FOR HEATING PURPOSESF (I) PASSING THE EFFLUENT SECOND GAS FROM STEP (F) TO SAID PLANT AND UTILIZING SAME AS AT LEAST A PART OF SAID FUEL, WHEREBY SOME OF SAID SOUR FEED GAS NORMALLY BURNED AS FUEL IN SAID PLANT IS RELEASED FOR OTHER USES; (J) PASSING THE EFFLUENT FIRST CONDENSATE FROM STEP (G) TO SAID PLANT TO EXTRACT GASOLINE THEREFROM; (K) RECOVERING THE EFFLUENT SECOND CONDENSATE FROM STEP (F) IN GAS FORM AS AN UPGRADED GAS PRODUCT MEETING HEATING GAS STANDARDS; AND (L) RECOVERING GASOLINE FROM SAID PLANT.