| abstract |
The present invention relates to a self-acting catalyst for treating heavy hydrocarbon feeds comprising calcined particles treated with an arsenic compound in the presence of hydrogen. The calcined particles comprise a co-milled mixture prepared by co-polishing an inorganic oxide powder, a molybdenum trioxide powder, and a nickel compound, and then forming the co-milled mixture into particles, thereby calcining the particles. The calcined particles are obtained. The calcined particles comprise from 1 to 10% by weight of molybdenum and the nickel present in an amount such that the weight ratio of nickel to molybdenum is less than 0.4. The calcined particles have a pore size distribution that contributes to the unique properties of the catalyst. The enhanced self-activated catalyst is used to hydrotreat heavy residual feeds having higher nickel, vanadium and sulfur concentrations. |