HYDROTHERMALLY STABLE HIGH PORE VOLUME ALUMINUM OXIDE/SWELLABLE CLAY COMPOSITES AND METHODS OF THEIR PREPARATION AND USE

摘要

(57) : Porous composite particles are provided which comprise an aluminum oxide component, e.g., crystalline boehmite, and a swellable clay component, e.g., synthetic hectorite, intimately dispersed within the aluminum oxide component at an amount effective to increase the hydrothermal stability, pore volume, and/or the mesopore pore mode of the composite particles relative to the absence of the swellable clay. Also provided is a method for making t he composite particles, agglomerate particles derived therefrom, and a process for hydroprocessing petroleum feedstock using the agglomerates to support a hydroprocessing catalyst. In said composite particles (A) the alumina oxide component comprises at least 75 wt. % alumina, at least 5 wt. % of which alumina is in the form of crystalline boehmite, gamma alumina derived from the crystalline boehmite, or mixtures thereof, (B) the swellable clay component is dispersible prior to incorporation into the composite particle and present in the composite particles at an amount (i) of less than 10 wt. %, based on the combined weight of the aluminum oxid e component and the swellable clay component.