Patent ID: 7408093
Filing Date: 2008-08-05
Classification: C10G

Abstract:
1. A process for cracking a hydrocarbon feedstock containing resid, said process comprising: (a) heating said hydrocarbon feedstock; (b) mixing the heated hydrocarbon feedstock with steam and optionally water to form a mixture stream; (c) introducing the mixture stream to a flash/separation apparatus to form i) a vapor phase which subsequently partially cracks and/or loses heat causing partial condensation of said vapor phase to provide coke precursors existing as uncoalesced condensate, and ii) a liquid phase; (d) removing the vapor phase with uncoalesced condensate as overhead; (e) treating said overhead by contacting with a condensing means downstream of said flash/separation apparatus to at least partially coalesce said coke precursors to provide residue hydrocarbon liquid, and subsequently removing said liquid; (f) heating the treated overhead from which said liquid is removed to provide a heated vapor phase; (g) cracking the heated vapor phase in a pyrolysis furnace to produce an effluent comprising olefins; and (h) quenching the effluent and recovering cracked product therefrom.