| 摘要 |
<p>A process for two-stage treatment of a new or regenerated catalyst containing (a) a support based on at least one oxide of a metal or of a metalloid and (b) at least one active metal, in which process, in a first stage carried out ex situ approximately between 0 and 50 DEG C and in the absence of hydrogen the catalyst is treated with the aid of at least one sulphurising agent so as to incorporate this agent partially or completely in the porosity of the catalyst, the sulphurising agent being an organic polysulphide, the said sulphurising agent being employed in solution in a solvent, in which process, next, in a second stage, the catalyst obtained in the first stage is treated by a method in which (a) (first part of the second stage) the catalyst is treated in the absence of hydrogen and at least in the presence of steam or of at least one moist inert gas, in situ or ex situ, at a temperature of between 65 and 275 DEG C (b) this catalyst is then treated (second part of the second stage) for at least approximately 1 minute at a temperature of at least 275 DEG C in the presence of hydrogen, the process being characterised in that during the first stage 0.1 to 10 % by weight of at least one nitrogen compound is added, the weight being expressed as nitrogen, relative to the weight of polysulphide or of polysulphides. </p> |
