Patent ID: 7470358
Filing Date: 2008-12-30
Classification: C10G

Abstract:
1. An integrated process for the production of low sulfur diesel which process comprises: a) reacting a distillate hydrocarbon feedstock having a boiling range greater than about 149° C. (300° F.) and a make-up hydrogen rich gaseous stream having a first pressure in a hydrodesulfurization reaction zone containing hydrodesulfurization catalyst to produce a hydrodesulfurization reaction zone effluent stream comprising diesel boiling range hydrocarbons having a reduced concentration of sulfur, and hydrogen; b) reacting a distillate hydrocarbon feedstock with hydrogen at a second pressure in a hydrocracking zone containing hydrocracking catalyst to produce a hydrocracking zone effluent stream comprising lower boiling hydrocarbons; c) compressing at least a portion of the hydrogen produced in step a) to a second pressure; d) introducing at least a portion of the hydrogen produced in step c) into the hydrocracking zone of step b); and e) recovering diesel boiling range hydrocarbons having a reduced concentration of sulfur; wherein said make-up hydrogen rich gaseous stream has not been reacted in said hydrocracking zone before it is reacted in said hydrodesulfurization reaction zone.