Patent ID: 8641889

Claim:
In a catalytic process for hydrocracking and/or hydrotreatment of hydrocarbon feeds the improvement wherein: the catalyst comprises an active phase containing at least one hydrogenating/dehydrogenating component selected from the group VIB elements and the non-precious elements of group VIII of the periodic table, used alone or in a mixture, and a support comprising at least one dealuminated zeolite Y having an overall initial atomic ratio of silicon to aluminium between 2.5 and 20, an initial weight fraction of extra-lattice aluminium atoms greater than 10%, relative to the total weight of aluminium present in the zeolite, an initial mesopore volume measured by nitrogen porosimetry greater than 0.07 ml.g −1 , and an initial crystal lattice parameter a 0 between 24.38 Å and 24.30 Å, said zeolite having been modified by a modification process comprising: a basic treatment stage wherein said dealuminated zeolite Y is mixed with a basic aqueous solution, said basic aqueous solution being a solution of basic compounds selected from alkaline bases and strong non-alkaline bases, wherein said basic treatment stage is carried out at a temperature between 40 and 100° C. and for a duration between 5 minutes and 5 hours; and at least one thermal treatment stage which is carried out at a temperature between 200 and 700° C., wherein said catalyst being suitable as a sulphide phase catalyst, and wherein after said modification process said zeolite Y has a final mesopore volume measured by nitrogen porosimetry at least 10% greater relative to the initial mesopore volume of the initial dealuminated zeolite Y, a final micropore volume measured by nitrogen porosimetry that is not decreased by more than 40%, relative to the initial micropore volume of said the initial dealuminated zeolite Y, a Brønsted acidity more than 10% higher relative than the Brønsted acidity of the initial dealuminated zeolite Y, and a final crystal lattice parameter a 0 greater than the initial crystal lattice parameter a 0 of the initial dealuminated zeolite Y.