HYDROCRACKING METHOD USING A MODIFIED ZEOLITE

摘要

The invention relates to a method for the hydrocracking and/or hydroprocessing of hydrocarbon feeds, using a catalyst comprising at least one hydro-dehydrogenating metal selected from the group containing metals from group VIB and non-noble group VIII of the periodic table, and a substrate comprising at least one zeolite which has at least pore openings containing 12 oxygen atoms and which is modified by: (a) at least one step comprising the introduction of at least one alkaline cation belonging to groups IA or IIA of the periodic table; (b) a step comprising the treatment of the zeolite in the presence of at least one molecular compound containing at least one silicon atom; (c) at least one step comprising the partial exchange of the above-mentioned alkaline cations with NH4 + cations, such that the remaining concentration of alkaline cations in the modified zeolite at the end of step (c) is such that the alkaline cation/aluminium molar ratio is between 0.2:1 and 0:01:1; and (d) at least one heat treatment step.