Processing of steam-cracked naphtha light end products

Claim 1

IN A PROCESS FOR RECOVERING C2 TO C5 HYDROCARBON FRACTIONS RICH IN ALKENES AND DIENES FROM A GASEOUS STREAM INCLUDING STEAM, C2 TO C5 HYDROCARBONS AND HIGHER BOILING NAPHTHA HYDROCARBONS SEPARATED OVERHEAD FROM HIGHER BOILING STEAM-CRACKED NAPHTHA PRODUCTS IN A QUENCHING ZONE, THE IMPROVEMENT WHICH COMPRISES PASSING SAID GASEOUS STREAM TO CONDENSING AND SEPARATION ZONES, CONDENSING WATER WITH C4 AND HIGHER BOILING HYDROCARBONS FROM SAID GASEOUS STREAM SEPARATING CONDENSED HYDROCARBONS FROM THE WATER AND FROM UNCONDENSED GASEOUS HYDROCARBONS IN THE SEPARATION ZONE PASSING THESE UNCONDENSED GASEOUS HYDROCARBONS TO A VAPOR COMPRESSION ZONE, PASSING THUS SEPARATED CONDENSED HYDROCARBONS INTO A FRACTIONATION ZONE, AND PASSING AT LEAST A SUBSTANTIAL PART OF THE VAPORS RICH IN C5 AND LIGHTER HYDROCARBONS FROM SAID FRACTIONATION ZONE TO JOIN THE GASEOUS STREAM FROM THE QUENCHING ZONE PRIOR TO CONDENSATION THEREOF, TO OBTAIN COOLING OF SAID GASEOUS STREAM AND AN INCREASED AMOUNT OF CONDENSED HYDROCARBONS IN SAID SEPARATION ZONE.