Patent ID: 7794588
Filing Date: 2010-09-14
Classification: C10G

Abstract:
1. A process for producing low sulfur diesel with reduced levels of poly-aromatics, the process comprising: providing a diesel boiling range hydrocarbon stream with a sulfur content and a poly-aromatic content; converting the diesel boiling range hydrocarbon stream in a hydrotreating reaction zone at hydrotreating conditions effective to produce a hydrotreated effluent having a reduced concentration of sulfur relative to the diesel boiling range hydrocarbon stream; taking at least a portion of the hydrotreated effluent as a hydroprocessing feed; admixing hydrogen with the hydroprocessing feed, the hydrogen in a form available for substantially consistent consumption in the substantially liquid-phase continuous hydroprocessing zone; reacting the hydroprocessing feed substantially undiluted with another hydrocarbon stream in the substantially liquid-phase continuous hydroprocessing zone over a catalyst and at conditions effective to convert at least a portion of the poly-aromatic content in the hydroprocessing feed into mono-aromatics to form a liquid-phase continuous hydroprocessing zone effluent; and the liquid-phase continuous hydroprocessing zone effluent includes a reduced concentration of sulfur and a reduced level of poly-aromatics relative to the diesel boiling range hydrocarbon stream.