Residual oil hydrotreating catalyst and preparation method thereof

The invention belongs to the technical field of catalyst materials, and particularly relates to a residual oil hydrotreating catalyst and a preparation method thereof. The catalyst comprises an alumina carrier and an active metal component loaded on the carrier. The alumina carrier phase is a delta phase or a theta phase, or a mixed phase of the delta phase and the theta phase. Active metal components contained in the catalyst are at least one VIB group metal component and at least one VIII group metal component. The catalyst provided by the invention has a suitable pore structure and a uniquechannel structure. The catalyst has good diffusion and reaction channels, reduces the diffusion resistance of residual oil molecules, has high activity, is suitable for an up-flow residual oil hydrotreatment process, especially for a residual oil hydrodemetallization reaction, can eliminate the influence of residual oil macromolecular diffusion on the reaction, and improves the utilization rate of the catalyst. 本发明属于催化剂材