Hydrodesulphurization of hydrocracked pitch

Details Hydrodesulphurization of hydrocracked pitch Hydrodesulphurization of hydrocracked pitch

C - Chemistry, Metallurgy

10

C

204/91.1

C10C 3/02 (2006.01) B01J 19/12 (2006.01) C10C 3/00 (2006.01)

Patent

CA 1193574

Abstract: An exceptionally effective technique has been developed for desulphurizing hydrocracked petroleum pitch containing organic molecules having at least some chemic- ally bound sulphur. Particles of petroleum pitch and a para- or ferromagnetic material catalyst are intimately mixed and this mixture in the presence of hydrogen is subjected to microwave radiation so as to generate a high intensity oscillating electric field thereby releasing at least part of the chemically bound sulphur from the pitch as sulphur-containing gases without substantial increase of the temperature of the pitch and separating the sulphur containing gases thus formed. To avoid temperature rise during desulphurization, the microwave irradiation is preferably gated in a train of short pulses.

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