Patent ID: 8361311

Claim:
A process for cracking a hydrocarbon feed containing resid, comprising: (a) heating a hydrocarbon feedstock containing resid; (b) passing said heated hydrocarbon feedstock to a vapor/liquid separator; (c) flashing said heated hydrocarbon feedstock in said separator to form a vapor phase and a liquid bottoms phase containing said resid; (d) passing at least a portion of said resid-containing liquid bottom phase from said separator to a thermal conversion reactor where the resid-containing liquid bottoms phase is heated to 649° C. or more, wherein said thermal conversion reactor contains coke particles, said reactor having a coke particle/fresh feed ratio (wt/wt) of at least 1:1, based on the weight of circulating coke solids and fresh feed entering the reactor; and (e) converting at least a portion of said resid into olefins; (f) mixing said resid-containing liquid bottoms phase with an effluent from a fluidized catalytic cracking (FCC) reactor containing FCC catalyst fines, prior to passing said liquid bottoms phase to said thermal reactor wherein the concentration of FCC catalyst fines achieves a steady state level between 5 wt. % and 25 wt. % of the circulating solids.