Patent ID: 6582590
Filing Date: 2003-06-24
Classification: B01J,C07C,C08F,C10G

Abstract:
A multistage hydroprocessing process comprising:a) reacting a feedstream in a first hydroprocessing stage in the presence of a hydrogen-containing treat gas, the first stage containing one or more reaction zones, each reaction zone operated at first stage hydroprocessing conditions and in the presence of a first hydroprocessing catalyst, thereby resulting in a first liquid product stream; b) passing the first liquid product stream to a first separation zone where a first vapor phase product stream and a first liquid phase product stream are produced; c) reacting the first liquid phase product stream of b) above in a second hydrodesprocessing stage in the presence of a hydrogen-containing treat gas, the second hydroprocessing stage containing one or more second stage reaction zones operated at second stage hydroprocessing conditions wherein each reaction zone contains a second hydroprocessing catalyst, thereby resulting in a second liquid product stream having less than about 1,000 wppm sulfur; d) passing the second liquid product stream of step c) to a second separation zone wherein a second vapor phase stream and a second liquid phase stream are produced; e) reacting the second liquid phase stream from d) in a third reaction stage in the presence of a hydrogen-containing treat gas, the third hydroprocessing stage containing one or more reaction zones operated at third stage hydroprocessing conditions in the presence of a third hydrotreating catalyst, in order to form a third liquid product stream; f) passing the third liquid product stream to a third separation zone wherein a third vapor phase stream and a third liquid phase stream are produced; and g) collecting both the third vapor phase stream and the third liquid phase stream; wherein at least one of the reaction zones of at least one of the hydroprocessing stages contains a bulk multimetallic catalyst comprised of at least one Group VIII non-noble metal and at least two Group VIB metals and wherein the ratio of Group VIB metal to Group VIII non-noble metal is from about 10:1 to about 1:10.