Hydrodesulphurization of hydrocracked pitch

Details Hydrodesulphurization of hydrocracked pitch Hydrodesulphurization of hydrocracked pitch

1984-07-13

1985-10-08

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204162R, 208244, 44 1SR, B01J 1912, C10G 3200, C10L 904

Patent

active

045458790

ABSTRACT:
An exceptionally effective technique has been developed for desulphurizing hydrocracked petroleum pitch containing organic molecules having at least some chemically 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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