Patent ID: 11859142
Assignee: UOP LLC
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A hydrocracking process for maximization of naphtha while producing base oil comprising:
hydrocracking a hydrocarbon feed stream in a first stage hydrocracking reactor in the presence of a hydrogen stream and a hydrocracking catalyst to produce a first hydrocracked effluent stream;
separating the first hydrocracked effluent stream in a separator to provide a vapor hydrocracked stream and a liquid hydrocracked stream;
fractionating the liquid hydrocracked stream in a first stage fractionation column to provide a naphtha stream, a kerosene stream, a diesel stream and a first unconverted oil stream;
recycling a recycle stream comprising one, two or all of a portion of the kerosene stream, a portion of the diesel stream, and a portion of the first unconverted oil stream to a second stage hydrocracking reactor to provide a second hydrocracked effluent stream;
fractionating the second hydrocracked effluent stream in a second stage fractionation column to provide a second unconverted oil stream;
withdrawing a remaining portion of the first unconverted oil stream for base oil production; and
withdrawing a UCO drag stream comprising about 0.1 wt % to about 5 wt % of said hydrocarbon feed stream from said second unconverted oil stream.