Process for recovering separated olefins and diolefins

Claim 1

IN A PROCESS OF SEPARATING C2 TO C5 OLEFINS AND DIOLEFINS FROM A WATER-WET GASEOUS MIXTURE THEREOF, THE IMPROVEMENT WHICH COMPRISES COOLING SAID GASEOUS MIXTURE TO CONDENSE THEREFROM C5 COMPONENTS WITH PART OF THE C3 AND C4 COMPONENTS AS AN INITIAL PARTIAL CONDENSATE TO LEAVE A REMAINING GAS STREAM CONTAINING C2 WITH UNCONDENSED C3 AND C4 COMPONENTS, COOLING SAID REMAINING GAS STREAM TO FURTHER CONDENSE OUT A SUBSTANTIAL AMOUNT OF THE C3 AND C4 COMPONENTS AS AN INTERMEDIATE PARTIAL CONDENSATE, THEN DRYING THE REMAINING GAS STREAM CONTAINING C2 TO C4 COMPONENTS RELATIVELY ENRICHED IN C2 COMPONENTS TO REMOVE WATER VAPOR THEREFROM, FRACTIONATING FROM THE RESULTING DRY C2 TO C4 COMPONENTS AN ETHYLENE DISTILLATE TO LEAVE A LIQUID RESIDUE CONTAINING C3 AND C4 COMPONENTS, PASSING SAID LIQUID RESIDUE INTO A PROPYLENE DISTILLATION ZONE, DIRECTLY PASSING SAID INTERMEDIATE PARTIAL CONDENSATE OF C3 AND C4 COMPONENTS INTO SAID PROPYLENE DISTILLATION ZONE, DISTILLING OVERHEAD C3 COMPONENTS IN SAID PROPYLENE DISTILLATION ZONE AND WITHDRAWING C4 COMPONENTS AS A BOTTOMS PRODUCT FROM SAID PROPYLENE DISTILLATION ZONE.