Patent ID: 7837860

Claim:
An integrated process for the hydrocracking of a feedstock comprising light cycle oil (LCO) and hydrotreating a distillate hydrocarbon stream which process comprises: a) reacting a distillate hydrocarbon feedstock having a boiling range greater than about 149° C. (300° F.) and a hydrogen-rich gaseous stream in a hydrodesulfurization reaction zone containing desulfurization catalyst to produce a hydrodesulfurization reaction zone effluent stream containing hydrocarbons having a reduced concentration of sulfur; b) reacting a highly aromatic, substantially dealkylated hydrocarbon feedstock in a hydrocracking zone containing hydrocracking catalyst to produce a hydrocracking zone effluent stream comprising monocyclic aromatic compounds boiling in the naphtha range; c) introducing at least a portion of the monocyclic compounds boiling in the naphtha range produced in step (b) into a first vapor liquid separator; d) introducing the hydrodesulfurization reaction zone effluent stream containing hydrocarbons having a reduced concentration of sulfur produced in step (a) into a second vapor liquid separator; and e) separating a liquid hydrocarbonaceous stream from the first vapor liquid separator to produce high octane naphtha.