Process for stripping of absorption liquids

Claim 1

IN THE PROCESS OF SEPARATING PROPANE AND HEAVIER HYDROCARBONS FROM A HYDROCARBON FEED GAS MIXTURE IN AN ABSORPTION ZONE BY CONTACTING SAID HYDROCARBON FEED GAS MIXTURE WITH A HYDROCARBON ABSORPTION OIL TO DISSOLVE PROPANE AND HEAVIER HYDROCARBONS PREFERENTIALLY IN SAID HYDROCARBON ABSORPTION OIL, THE IMPROVEMENT IN STRIPPING SAID PROPANE AND HEAVIER HYDROCARBONS FROM SAID HYDROCARBON ABSORPTION OIL FOR RECYLE OF SAID HYDROCARBON ABSORPTION OIL TO AID ABSORPTION ZONE COMPRISING REMOVING SAID HYDROCARBON ABSORPTION OIL FROM SAID ABSORPTION ZONE, PASSING SAID HYDROCARBON ABSORPTION OIL TO A STRIPPING ZONE, HEATING A FIRST STRIPPING MEDIUM CONSISTING SUBSTANTIALLY ENTIRELY OF PROPANE IN A FIRST HEATING ZONE, STRIPPING BUTANE AND HEAVIER HYDROCARBONS FROM SAID HYDROCARBON ABSORPTION OIL AND SUBSTANTIALLY SATURATING SAID HYDROCARBON ABSORPTION OIL WITH PROPANE BY BLOWING SAID HEATED FIRST STRIPPING MEDIUM THROUGH SAID HYDROCARBON ABSORPTION OIL IN SAID STRIPPING ZONE, HEATING A SECOND STRIPPING MEDIUM CONSISTING SUBSTANTIALLY ENTIRELY OF METHANE AND ETHANE IN A SECOND HEATING ZONE, STRIPPING SAID PROPANE FROM SAID HYDROCARBON ABSORPTION IN AND SUBSTANTIALLY SATURATING SAID HYDROCARBON ABSORPTION OIL WITH METHANE AND ETHANE BY BLOWING SAID HEATED SECOND STRIPPING MEDIUM THROUGH SAID HYDROCARBON ABSORPTION OIL, REMOVING GASEOUS OVERHEAD FROM SAID STRIPPING ZONE, CONDENSING GASEOUS OVERHEAD FROM SAID STRIPPING ZONE, PASSING SAID CONDENSED OVERHEAD TO A DEETHANIZATION ZONE, SUBJECTING SAID CONDENSED OVERHEAD IN SAID DEETHANIZARION ZONE TO FRACTIONATION TO REMOVE THEREFROM AS OVERHEAD SAID SECOND STRIPPING MEDIUM CONSISTING SUBSTANTIALLY ENTIRELY OF METHANE AND ETHANE, PASSING SAID OVERHEAD TO SAID SECOND HEATING ZONE, REMOVING BOTTOMS TO A DEPROPANIZATION ZONE,SUBJECTPASSING SAID BOTTOMS TO A DEPROPANIZATION ZONE, SUBJECTING SAID BOTTOMS IN SAID DEPROPANIZATION ZONE TO FRACTIONATION TO REMOVE THEREFROM AS OVERHEAD SAID FIRST STRIPPING MEDIUM CONSISTING SUBSTANTIALLY ENIRELY OF PROPANE, PASSING SAID OVERHEAD TO SAID FIRST HEATING ZONE, REMOVING HYDROCARBON ABSORPTION OIL FROM SAID STRIPPING ZONE, AND RECYCLING SAID HYDROCARBON ABSORPTION OIL TO SAID ABSORPTION ZONE.