Patent ID: 7982077
Filing Date: 2011-07-19
Classification: B01D,C10G,C10L,Y02E,Y02P

Abstract:
1. A process for producing a paraffin-rich diesel product from a renewable feedstock comprising: a) treating the feedstock in a reaction zone by hydrogenating and deoxygenating the feedstock using at least one catalyst at reaction conditions in the presence of hydrogen and at least one sulfur containing component to provide a reaction zone product stream comprising hydrogen, hydrogen sulfide, carbon dioxide, water and a hydrocarbon fraction comprising paraffins useful as a diesel boiling range fuel; b) cooling the reaction zone product stream and separating, at a separation temperature and at essentially the same pressure as the reaction pressure: c) selectively recovering a portion of the hydrocarbon component and recycling a portion of the hydrocarbon component to the reaction zone, wherein the recovering and recycling are at essentially the same pressure as the reaction pressure; d) passing the gaseous component, at essentially the same pressure as the reaction pressure and at a temperature that is at least about 1° C. above the separation temperature of step (b), though at least one amine absorber zone to produce a stream containing at least hydrogen and depleted in carbon dioxide; and e) recycling the stream containing at least hydrogen and depleted in carbon dioxide to the reaction zone.