Method and catalytic fractions for catalytic hydrodesulphurisation of residual cylinder oils whose vanadium and nickel content is greater than 120-millionth weight and C5-asphaltene content yl i.5-weightin which the particulate pulp content

摘要

1356272 Hydrodesulphurizing residual oils SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 12 July 1971 [14 July 1970] 32596/71 Heading C5E [Also in Division B1] A residual hydrocarbon oil or oil fraction having a total V + Ni content above 120 p.p.m.w. and a C 5 -asphaltene content above 0À5 wt. per cent is hydrodesulphurized in the presence of catalyst particles having a pore volume above 0À30 ml./g., less than 10% of the pore volume as pores with a diameter above 1000 Š and a specific pore diameter p(Š) of 75dSP0.9/SP to 170dSP0.9/SP wherein d is the specific particle diameter (mm), or agglomerates of such particles (See Division B1), the catalyst not being replenished. The reaction can be performed substantially in the liquid phase using a vertical, fixed bed of catalyst through which the feed can be passed upwardly, downwardly or radially. In the last case the feed can be driven by a hydrogen-powered gas-lift. When the feed passes upwardly the adiabatic temperature rise can be limited to 10‹ C. by recycling feed or hydrogen injection.