| abstract |
The invention relates to a process for rejuvenating an at least partially spent catalyst from a hydrotreatment and / or hydrocracking process, said at least partially used catalyst being from a fresh catalyst comprising at least one group metal VIIl, at least one metal from group VIB, an oxide support, and optionally phosphorus, said process comprises the following stages: a) the catalyst, at least partially used, is regenerated in a flow of gas containing oxygen at a temperature between 300 ° C and 550 ° C so as to obtain a regenerated catalyst, b) then said regenerated catalyst is brought into contact with phosphoric acid and an organic acid having each acidity constant pKa greater than 1.5 , c) a drying step is carried out at a temperature below 200 ° C. without calcining it subsequently, so as to obtain a rejuvenated catalyst, and the use of the rejuvenated catalyst in the field of hydrotreating and / or hydrocracking e. |