| abstract |
In-situ activation process of at least one hydrotreatment catalyst comprising, at least: 1) a loading step of at least one hydrotreatment catalyst in a hydrotreatment reactor; then 2) an injection step of a liquid load to be subjected to hydrotreatment comprising a sulfur content of between 0.01% and 20% by weight, at temperatures ranging from 120°C to 350°C; then 3) a sulfurization step of said hydrotreating catalyst in the presence of a sulfurization agent; and 4) a passivation step of said hydrotreating catalyst in the presence of at least one nitrogenous compound having at least two, more preferably at least three, and even more preferably at least four of the following characteristics: a) a content weight in nitrogen ranging from 15 to 35% by weight, preferably ranging from 20 to 35%, more preferably ranging from 20 to 30%, and more advantageously ranging from 20 to 25% with respect to the total weight of the nitrogenous compound; b) a number of nitrogen atoms ranging from 2 to 20, preferably ranging from 2 to 15, more preferably ranging from 2 to 10, even more preferably ranging from 2 to 5 per molecule, advantageously two nitrogen atoms nitrogen per molecule; c) a boiling point ranging from 140 °C to 300 °C, preferably ranging from 140 °C to 250 °C, more preferably ranging from 140 °C to 200 °C, even more preferably ranging from 140°C to 175°C; and d) said nitrogenous compound being in liquid form at room temperature and at atmospheric pressure, it being understood that characteristic b) is always present. |