Hydrotreating process vacuum distillate using a sequence of catalysts

摘要

Hydrotreating process of a hydrocarbon feed containing nitrogen compounds with more than 250 ppm by weight content and having an average temperature above 380 ° C weighted, comprising the following steps: a) contacting in the presence of said hydrogen hydrocarbon charge with at least a first catalyst comprising an amorphous support based on alumina, phosphorus and an active phase formed by at least one group VIB metal in oxide form and at least one group VIII metal as oxide, the first catalyst according to a process comprising at least one calcination step, b) contacting in the presence of hydrogen the effluent obtained from step a) with at least one second catalyst comprising an amorphous support being prepared alumina based phosphor, an active phase formed by at least one group VIB metal and at least one group VIII metal, and at least one organic compound qu and it contains oxygen and / or nitrogen, the second catalyst according to a method comprising the steps being arranged: i) contacting at least one compound of a metal from group VIB, at least one compound of a metal from group VIII , phosphorus and at least one organic compound containing oxygen and / or nitrogen with the support, so that a catalyst precursor, ii is obtained) drying said catalyst precursor obtained in step i) to a temperature below 200 ° C no I subsequently calcining so that a hydrotreated effluent is obtained.