Patent ID: 8828217
Filing Date: 2014-09-09
Classification: B01J,C10G,Y02E,Y02P

Abstract:
1. A method for making a diesel fuel product, comprising: contacting a feedstock with a hydrotreating catalyst in a plurality of hydrotreating stages under effective hydrotreating conditions, each hydrotreating stage having a continuous gas phase environment, at least a portion of the feedstock being comprised of a biocomponent feed, the feedstock having an oxygen content of at least about 1 wt % and a sulfur content of at least about 500 wppm, the feedstock having a first stoichiometric hydrogen need for said hydrotreating; prior to or during contact of the feedstock with at least one additional hydrotreating stage, mixing the feedstock with a recycled product stream into which hydrogen is at least partially dissolved, the at least one additional hydrotreating stage being downstream from at least one of the plurality of hydrotreating stages; mixing the effluent from the plurality of hydrotreating stages with a second recycled product stream into which hydrogen is at least partially dissolved; separating the effluent from the plurality of hydrotreating stages into a gas phase effluent portion and a liquid phase effluent portion; and contacting the liquid phase effluent portion with a catalyst in a hydroprocessing stage having a continuous liquid phase environment under effective hydroprocessing conditions to form a diesel fuel product, the liquid phase effluent portion having a second stoichiometric hydrogen need for said hydroprocessing stage, the diesel fuel product being substantially deoxygenated and having a sulfur content of about 100 wppm or less, wherein the total treat gas rate of hydrogen relative to the feed is less than about 1.2 times the combined first and second stoichiometric hydrogen needs, and wherein the total hydrogen treat gas rate is about 750 scf/bbl (about 130 Nm