| abstract |
The invention relates to the preparation of a catalyst containing:n a mainly aluminium oxide calcined support; a hydro-dehydrogenating active phase containing at least one metal of group VIB, the process including: a) a first precipitation step of at least one basic precursor and at least one acidic precursor, b) a heating step, c) a second precipitation step by addition to the suspension of at least one basic precursor and at least one acidic precursor, d) a filtration step; e) a drying step, f) a moulding step, g) a heat treatment step; h) an impregnation step of the hydro-dehydrogenating active phase on the support obtained in the step g). |