TWO STAGE SERIES HYDROTREATMENT

摘要

A slurry catalytic hydroconversion process comprising at least two hydroconversion zones is provided in which heavy hydrocarbonaceous fresh oil feed is added to more than one hydroconversion zone. Catalysts or catalyst precursors are added to the first hydroconversion zone and preferably also to subsequent hydroconversion zone(s) wherein said subsequent hydroconversion zone(s) are maintained at a temperature of at least 10 DEG F (5.55 DEG C) higher than an immediately preceding hydroconversion zone.