Patent ID: 8663458

Claim:
A process for producing pyrolysis gasoline having reduced acetylene and sulfur content for use as automotive blending stock comprising feeding hydrogen and prefractionated thermally cracked petroleum stock pyrolysis gasoline boiling in the range of about C 6 -450° F. containing acetylene, diolefins, sulfur compounds and nitrogen compounds to as single stage hydrodesulfurization zone containing a hydrodesulfurization catalyst under conditions of temperature and pressure to provide a completely vapor phase reaction mixture of said hydrogen and pyrolysis gasoline mixture in the range of 550° F. to 850F.° having a mol ratio of hydrogen to pyrolysis gasoline of 0.5:1 to 3:1 wherein a portion of said acetylene and diolefins are reacted with hydrogen to produce saturated products and a portion of said sulfur compounds react with hydrogen to produce hydrogen sulfide, wherein pyrolysis gasoline is recovered from said hydrodesulfurization zone and a portion condensed, wherein the condensed portion is separated into two fractions, wherein a first fraction is recovered as a product and a second fraction is recycled to said hydrodesulfurization zone.