Process for cracking crude oil

Details Process for cracking crude oil Process for cracking crude oil

C - Chemistry, Metallurgy

07

C

196/81, 260/708.

C07C 2/00 (2006.01) C10G 9/36 (2006.01)

Patent

CA 1047543

ABSTRACT OF THE DISCLOSURE A process for the cracking of crude oil to provide lower olefins, said process being carried out in a system comprising a mixing zone and an adiabatic reaction zone, each of said zones having an upstream end and a downstream end, the downstream end of the mixing zone being contiguous with the upstream end of the reaction zone, wherein both of said zones are in open relationship with each other and have a common geometrical axis running from the upstream end of the mixing ??e through the downstream end of the reaction zone, and a quenching zone, comprising the following steps: (a) introducing into the mixing zone in a direction about perpendicular to the axis, a mixture of combustion gases,produced from the essentially complete combustion of a fuel gas and oxygen mixed together with steam, at subsonic velocity ant an inlet temperature of about 1000°C. to about 2400°C.; (b) introducing into the mixing zone in a downstream axial direction, crude oil, in a ratio of about 0.5 to about 1 part by weight of crude oil per part by weight of gases, in such a manner that essentially all of the crude oil vaporizes into the gases in said mixing zone; (c) passing the effluent from the mixing zone into the reaction zone wherein the outlet temperature of the reaction zone is in the range of about 600°C. to about 1100°C., the pressure of the reaction zone is in the range of about 3 psig to about 30 psig, and the residence time of the crude oil and products thereof in the mixing zone and the reaction zone combined in about 6 to about 60 milliseconds; (d) passing the effluent from the reaction zone into the quenching zone, said quenching having a sufficiently low temperature to stop the reaction essentially instant- aneously; and (e) recovering the effluent from the quenching zone. -2-

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