Patent ID: 7547386

Claim:
An integrated process for hydroprocessing multiple feed streams which process comprises the following steps: (a) reacting a light cycle oil feedstream in a hydrocracking reaction zone containing hydrocracking catalyst to produce lower boiling hydrocarbons comprising naphtha; (b) separating the lower boiling hydrocarbons comprising naphtha in a first separation zone to produce a vaporous hydrocarbon stream comprising hydrogen and naphtha, and a first liquid hydrocarbon stream; (c) partially condensing the vaporous hydrocarbon stream comprising hydrogen and naphtha from step (b) to produce a hydrogen-rich gaseous stream and at least a portion of a second liquid hydrocarbon stream; (d) reacting a separate hydrocarbon feedstream comprising vacuum gas oil in a hydrodesulfurization reaction zone to produce a desulfurized hydrocarbon stream comprising diesel boiling range hydrocarbons and desulfurized vacuum gas oil; (e) separating the desulfurized hydrocarbon stream comprising diesel boiling range hydrocarbons and desulfurized vacuum gas oil from step (d) in a second separation zone to produce a vaporous hydrocarbon stream comprising hydrogen and diesel boiling range hydrocarbons, and a third liquid hydrocarbonaceous stream containing desulfurized vacuum gas oil; (f) recycling at least a portion of the hydrogen-rich gaseous streams produced in steps (c) and (e) to the hydrocracking zone and the hydrodesulfurization reaction zone; and (g) recovering desulfurized diesel boiling range hydrocarbons.