Patent ID: 9404053
Filing Date: 2016-08-02
CPC Classification: C10G

Claim Text:
1. A low-pressure process for the hydrodenitrogenation and hydrodesulfurization of a gas oil feedstock, wherein said low-pressure process comprises: providing a stacked-bed reactor system that comprises a reactor vessel defining a reaction zone comprising: at least three catalyst beds positioned in a stacked spaced relationship to each other and providing a total bed volume with a first catalyst bed of a first bed volume that includes a first catalyst; a second catalyst bed of a second bed volume that includes a second catalyst; and a third catalyst bed of a third bed volume that includes a third catalyst, wherein: said first catalyst comprises cobalt and molybdenum supported on alumina; said second catalyst comprises a support material containing nickel, molybdenum, a hydrocarbon oil and a polar additive, which polar additive is an amide having a dipole moment greater than 0.45 debyes; and said third catalyst comprises cobalt and molybdenum on an alumina support; introducing a gas oil feedstock, having an organic nitrogen concentration and an organic sulfur concentration, into said reaction zone that is operated under a pressure in the range of 300 psig to 650 psig; and yielding from said reaction zone a hydrotreated gas oil having reduced organic nitrogen concentration and organic sulfur concentration over those of said gas oil feedstock.