Process for the start-up of hydrotreatment or hydroconversion units

摘要

The invention describes a process for start-up of a hydrotreatment or hydroconversion unit carried out in the presence of hydrogen, in at least 2 catalytic beds, process in which
At least one bed contains at least one presulfurized and preactivated catalyst and at least one catalytic bed that contains a catalyst whose catalytic metals are in oxidized form,A so-called starting feedstock, which is a hydrocarbon fraction that contains at least 0.5% by weight of sulfur, lacking olefinic compounds and not containing an added sulfur-containing compound, passes through a first catalytic bed that contains said presulfurized and preactivated catalyst and then passes through at least one catalytic bed that contains a catalyst whose catalytic metals are in oxidized form,And the first presulfurized and preactivated catalyst bed reaches a temperature of at least 220° C.

主权项

1. A process for start-up of a hydrotreatment or hydroconversion reaction carried out in the presence of hydrogen, in at least 2 catalytic beds, comprising
at least one bed contains at least one presulfurized and preactivated catalyst, and at least one catalytic bed contains a catalyst whose catalytic metals are in oxidized form, passing a starting feedstock, which is a hydrocarbon fraction that contains at least 0.3% by weight of sulfur, lacking olefinic compounds and not containing an added sulfur-containing compound, through a first catalytic bed that contains said presulfurized and preactivated catalyst and then passes through at least one catalytic bed that contains a catalyst whose catalytic metals are in oxidized form, and the first presulfurized and preactivated catalyst bed reaches a temperature of at least 220° C.,wherein the presulfurized and preactivated catalyst and the catalyst whose catalytic metals are in oxidized form are the same catalyst with the exception of their form being presulfurized and preactivated versus oxidized.