Desulfurization product recovery process

Claim 1

IN A PROCESS FOR THE TREATMENT OF A LIQUID-VAPOR HYDROCARBON MIXTURE CONTAINING A NON-CONDENSABLE GAS OBTAINED FROM A REACTION ZONE IN WHICH HYDROCARBON MATERIALS ARE REACTED IN THE PRESENCE OF HYDROGEN-CONTAINING GASES AT AN ELEVATED TEMPERATURE AND PRESSURE IN WHICH SAID HYDROCARBON MIXTURE IS PASSED TO A FIRST SEPARATION ZONE, A FIRST RELATIVELY HIGH-BOILING LIQUID STREAM AND A FIRST VAPOROUS STREAM ARE RECOVERED FROM SAID FIRST SEPARATION ZONE AT AN ELEVATED TEMPERATURE AND PRESSURE, SAID VAPOROUS STREAM IS COOLED AND PASSED TO A SECOND SEPARATION ZONE AT A REDUCED TEMPERATURE, A SECOND RELATIVELY LOW-BOILING LIQUID STREAM AND A SECOND GASEOUS STREAM ARE RECOVERED FROM SAID SECOND SEPARATION ZONE AT A REDUCED TEMPERATURE, AND IN WHICH SAID FIRST AND SECOND LIQUID STREAMS ARE FURTHER TREATED FOR THE PURPOSE OF SEPARATING AT LEAST A HIGH-BOILING AND A LOW-BOILING PRODUCT FRACTION, THE IMPROVEMENT WHICH COMPRISES: PASSING SAID SECOND LIQUID STREAM IN INDIRECT HEAT EXCHANGE WITH SAID HYDROCARBON MIXTURE OBTAINED FROM SAID REACTION ZONE AND PASSED TO SAID FIRST SEPARATION ZONE TO HEAT SAID SECOND LIQUID STREAM TO AN ELEVATED TEMPERATURE SUITABLE FOR ADMIXTURE WITH SAID FIRST LIQUID STREAM, COMBINING THE INDIRECTLY HEATED SECOND STREAM WITH THE FIRST LIQUID STREAM, PASSING THE COMBINED LIQUID STREAM WITHOUT FURTHER HEATING TO A STEAM STRIPPING ZONE OF A REDUCED PRESSURE AS THE HEAT SIPPLY THERETO TO SEPARATE A LOW-BOILING