Method for rejuvenating a catalyst from a hydroprocessing and/or hydrocracking process

A process for rejuvenating an at least partially spent hydrotreating and/or hydrocracking catalyst, said at least partially spent catalyst comprising at least one group VIB metal, at least one group VIII metal, an oxide support, and optionally phosphorus, the at least partially spent catalyst having a content of group VIB metal of between 1% and 40% by weight, expressed as oxide of said group VIB metal, relative to the weight of the catalyst, and a content of group VIII metal of between 1% and 10% by weight, expressed as oxide of said group VIII metal, relative to the weight of the catalyst, said process comprising the following steps:

• a) the at least partially spent catalyst is regenerated in a stream of oxygen-containing gas at a temperature of between 300° C. and 550° C., so as to obtain a regenerated catalyst,
• b) said regenerated catalyst is then brought into contact with an impregnation solution consisting of a mixture of water, at least one precursor of a group VIB metal, at least one precursor of a group VIII metal and at least one organic compound,
• the content of organic compound introduced into the impregnation solution being between 6% and 21% by weight of organic compound relative to the weight of the regenerated catalyst,
• the content of group VIB metal introduced into the impregnation solution being between 1% and 5% by weight, expressed as group VIB metal oxide, relative to the weight of the regenerated catalyst,
• the content of group VIII metal introduced into the impregnation solution being between 0.2% and 1% by weight, expressed as group VIII metal oxide, relative to the weight of the regenerated catalyst,
• the molar ratio of the organic compound to the sum of the group VIB and group VIII metals present in said solution being between 0.9 and 11 mol/mol,
• c) a drying step is then carried out at a temperature of less than 200° C., without subsequently calcining it, so as to obtain a rejuvenated catalyst.