Rejuvenation process for a spent catalyst regenerated from a gasoline hydrodesulfurization process.

摘要

The invention relates to a process for the rejuvenation of an at least partially spent catalyst from a hydrodesulfurization process of an olefinic gasoline fraction containing sulfur, said at least partially used catalyst being from a fresh catalyst a metal of the group VIIl, a metal from group VIB, an oxide support, said process comprising the following steps: a) the catalyst, at least partially used, is regenerated in a flow of gas containing oxygen at a temperature between 350 ° C. and 550 ° C., b) the regenerated catalyst is brought into contact with an impregnation solution containing a compound comprising a metal from group VIB, the molar ratio of the metal from group VIB added by metal from group VIB already present in the regenerated catalyst. being between 0.15 and 2.5 mol / mol, c) a drying step is carried out at a temperature below 200 ° C, and the use of the rejuvenated catalyst in such a hydrodesulfurization process.