PROCESS FOR PREPARING AN ADDITIVE-BASED MIXED METAL CATALYST

摘要

The present invention pertains to a process for preparing a catalyst composition wherein at least one Group VIII non-noble metal component and at least two Group VIB metal components are combined and reached in the presence of a protic liquid, after which the resulting composition is isolated and dried, the total of the Group VIII and Group VIB metal components, calculated as oxides, making up at least 50 wt.% of the catalyst composition, calculated on dry weight characterised in that an organic oxygen-containing additive is added prior to, during, or subsequent to the combining and reacting of the metal components in such and amount that the molar ratio of the total amount of Group VIII and Group VIB metal components is at least 0.01. The invention also pertains to additive-containing catalysts obtained by this process, and to their use in hydroprocessing.