Patent ID: 7951290

Claim:
A process for producing ultra low sulfur diesel and a fluid catalytic cracker (FCC) quality feedstock, the process comprising: a) hydrotreating a first hydrocarbonaceous feedstock in a first reaction zone containing a hydrotreating catalyst operating at hydrotreating conditions effective to convert said hydrocarbonaceous feedstock into a first reaction zone effluent having about 200 to about 1000 ppm sulfur, about 200 to about 600 ppm nitrogen, and about 11.5 to about 12.5 percent hydrogen; b) hydrocracking an unconverted hydrocarbonaceous feedstock in a second reaction zone containing at least a hydrocracking catalyst operating at hydrocracking conditions effective to produce a second reaction zone effluent including a high quality, ultra low sulfur diesel having a cetane number between about 40 and about 55 with less than 10 ppm sulfur; c) operating a fractionator to separate the first reaction zone effluent and the second reaction zone effluent into at least the high quality, ultra low sulfur diesel, a diesel boiling range hydrocarbon stream, and a bottoms FCC quality feedstock; and d) combining about 25 to about 40 percent of the bottoms FCC quality feedstock and the diesel boiling range hydrocarbon stream to form said unconverted feedstock to the second reaction zone.