Patent ID: 7678262
Filing Date: 2010-03-16
Classification: C10G

Abstract:
1. An improved hydrocracking process with a recycle, comprising eliminating polyaromatic compounds from at least a portion of the recycle by adsorbing said polyaromatic compounds on an adsorbant comprising alumina and silica with a mass content of silica (SiO 2 ) of more than 5% by weight to 95%, said adsorbant having: a sodium content of less than 0.03% by weight; a total pore volume, measured by mercury porosimetry, in the range 0.45 to 1.2 ml/g; a porosity such that: a BET specific surface area in the range 200 to 550 m an X ray diffraction diagram which contains at least the principal characteristic peaks of at least one of the transition aluminas included in the group composed of alpha, rho, khi, eta, gamma, kappa, theta and delta aluminas.