Patent ID: 7678732

Claim:
A process for preparing a catalyst composition suitable for the hydroconversion of heavy oils, comprising:(a) mixing a group VIB metal compound and aqueous ammonia to form a group VIB metal mixture in solution;(b) sulfiding the aqueous mixture of step (a) with a gas comprising hydrogen sulfide to form a slurry;(c) promoting the slurry with a Group VIII metal compound;(d) mixing under turbulent mixing conditions the slurry of step (c) with at least a hydrocarbon oil having a viscosity of at least 2 cSt @ 212° F. to form a homogenous slurry, and under sufficient temperature and pressure to maintain at least a portion of water in the slurry in a liquid phase, thereby forming an active catalyst composition admixed with a liquid hydrocarbon comprising slurry catalyst having an average particle size in the range of 1-20 microns.