| abstract |
The present invention relates to a process for preparing a catalyst based on molybdenum intended for a hydrotreating process or a hydrocracking process. The present invention relates to a hydrotreating process and a process for producing a catalyst for carrying out hydrogenation reactions in a hydrocracking process. The catalyst, at least one of Mo = O or Mo-OR bond or at least one combination of Mo = S or Mo-SR [R = C x H y, x ≥ 1 and (x - 1) ≤ y ≤ (2x + 1) or R = Si (oR ') 3 or R = Si (R') 3 , where R '= C x' H y ', x' ≥ 1 , and (x '- 1) ≤ y ' ≤ (2x ' + 1), from at least one mononuclear precursor based on molybdenum in the form of a unit or dimer, and optionally from at least one promoter element from group VIII. The precursors are deposited on an oxide support which is suitable for the process in which it is used and the catalyst is dried at a temperature below 200 ° C and then advantageously sulphurized before being placed in the process. |