| abstract |
The present invention relates to aluminum-silicate supports, catalysts and hydrocracking and hydrotreatment processes using them. The catalyst comprises at least one hydro-dehydrogenating element chosen from the group formed by the elements of group VIB and group VIII of the periodic table and a non-zeolitic support based on silica - alumina containing an amount greater than 5% by weight and less. or equal to 95% by weight of silica (SiO2) and has the following characteristics: - an average porous diameter, measured by mercury porosimetry, between 20 and 140 A, - a total pore volume, measured by mercury porosimetry, between 0.1 ml / g and 0.6 ml / g, - a total pore volume, measured by nitrogen porosimetry, between 0.1 ml / g and 0.6 ml / g, - a BET specific surface area between 100 and 550 m2 / g, - a pore volume, measured by mercury porosimetry, included in pores with a diameter greater than 140 A less than 0.1 ml / g, - a pore volume, measured by mercury porosimetry, included in the pores with a diameter greater than 160 A less than 0.1 ml / g, - a pore volume, measured p ar mercury porosimetry, included in pores with a diameter greater than 200 A less than 0.1 ml / g, - a pore volume, measured by mercury porosimetry, included in pores with a diameter greater than 500 A less than 0, 01 ml / g - an X diffraction pattern contains at least the main characteristic lines of at least one of the transition aluminas included in the group consisting of alpha, rho, chi, eta, gamma, kappa, theta and delta aluminas . |