Patent ID: 8921254

Claim:
A method of preparing a catalyst composition useful in the hydroprocessing of hydrocarbon feedstocks, wherein said method comprises: providing a support particle; impregnating said support particle with a first aqueous impregnation solution comprising a first Group VIII metal component, a first Group VIB metal component and a first phosphorous component to thereby provide a metals impregnated support; calcining said metals impregnated support to provide a base catalyst comprising Type I active sites and said first phosphorous component; impregnating said base catalyst with a second aqueous impregnation solution comprising a second Group VIII component, a second Group VIB component and a second phosphorous component to thereby provide a metals impregnated base catalyst; drying said metals impregnated base catalyst under non-calcination conditions that are controlled so as to provide a dried intermediate comprising Type II active sites and said second phosphorous component; and sulfiding said dried intermediate, without a prior calcination thereof, to thereby provide said catalyst composition.