Process for the preparation of improved hydroconversion catalysts and catalysts thus prepared

Abstract From the Canadian patent

A process for preparing hydroconversion catalysts having improved hydrodenitrification (HDN) activity containing Group, VIII and/or Group VIB catalytically active metals on a support and particularly those containing nickel and molybdenum by, incorporating zero-valent molybdenum and/or tungsten carbonyls into the catalyst support; wherein a liquid mixture containing metal carbonyl(s) and a catalytically active amount of dienes trienes or monoarcmatics to which free sulphur has been added is mixed with a dried catalyst support and heating the liquid-solid mixture until metal carbonyl conversion to metal disulphide is substantially complete. The catalyst is then dried followed by calcining in …