Process for the thermal cracking of hydrocarbons

C - Chemistry – Metallurgy – 10 – G

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C10G 9/00 (2006.01) C10G 9/38 (2006.01)

Patent

CA 1116114

11,276 PROCESS FOR THE THERMAL CRACKING OF HYDOCARBONS ABSTRACT OF THE INVENTION In a system for the thermal cracking of hydro- carbons by the introduction of liquid petroleum feedstock in atomized form into a stream of hot combustion products formed by the combustion of fuel and oxidant in successive burner and mixing zone, constricting throat zone, a velocity acceleration diffuser zone and secondary cracking and reaction zone along the path of hot combustion product stream flow, an improvement is disclosed which comprises: effecting initial mixing, vaporization and cracking of said atomized liquid petroleum feedstock in said stream of hot combustion products in said burner and mixing zone main- tained at subsonic velocity flow; effecting substantially complete mixing and vaporization in said constricting throat zone wherein said stream is maintained, at exit, at sonic velocity flow; passing said stream through a velocity acceleration diffuser zone maintained at supersonic velocity flow; passing said stream through a shock region produced by cross-sectional expansion of a diffuser zone; and effecting a final thermal cracking conversion in said stream in a subsonic velocity additional cracking reaction zone before quenching of said stream. SPECIFICATION

303823

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