FIELD: catalyst preparation methods.
SUBSTANCE: hydrodesulfurization catalyst is sulfidized in reflux-type reaction-distillation column in following consecutive stages: drying catalyst with inert gas; filling reaction-distillation column with sulfur-containing sulfidizing solvent; establishing hydrocarbon feedstock and hydrogen consumptions; starting recycling of sulfidizing solvent; heating reaction-distillation column to first temperature within a range of 300 to 500°F, which is higher than sulfidizing agent decomposition temperature; introducing sulfidizing agent; revealing by-product in top run, namely water azeotrope, and taking away water; monitoring breakthrough of sulfidizing agent into top run; raising temperature to second temperature within a range of 500 to 700°C and; maintaining said second temperature over a required period of time.
EFFECT: enhanced process efficiency.
14 cl, 2 dwg
