Patent ID: 7238276

Claim:
A medium-pressure hydrocracking process comprising the steps of contacting feed oil with a hydrocracking catalyst in a hydrocracking system under a medium pressure and hydrocracking conditions; separating the hydrocracking reaction product into a vapor fraction which is recycled to the hydrocracking system as recycling hydrogen, and a liquid fraction which is further separated in a separating system to produce distillates including jet fuel and/or diesel (hereinafter referred to as hydrocracked jet fuel and/or diesel) cuts; feeding a part or all of the hydrocracked jet fuel and/or diesel cuts into a hydrosaturation system where the cuts come into contact with a hydrosaturation catalyst and react with fresh hydrogen under hydrosaturation conditions; separating the hydrosaturation reaction product into a hydrogen-containing vapor which enters into the hydrocracking system as make-up hydrogen, and jet fuel and/or diesel (hereinafter referred to as the hydrosaturated jet fuel and/or diesel) which enter into a separation system for processing, wherein medium pressure is a pressure of from about 4.0 to about 10.0 MPa, and wherein said hydrosaturation reaction is carried out under a pressure of 0.5–3.0 MPa, at a temperature of 100–280° C., with a reduced hydrosaturation catalyst comprising at least 50 wt % of nickel based on its oxide.