Patent ID: 8039682
Filing Date: 2011-10-18
Classification: C10G,Y02P

Abstract:
1. A process for producing a hydrocarbon product stream from a renewable feedstock, the hydrocarbon product stream comprising hydrocarbons having boiling points in the aviation fuel range, said process comprising; a) hydrogenating, deoxygenating, isomerizing, and selectively hydrocracking the renewable feedstock in a reaction zone in the presence of hydrogen and at reaction conditions, by contacting the renewable feedstock with a multifunctional catalyst or a set of catalysts having hydrogenation, deoxygenation, isomerization, and selective hydrocracking functions to provide a reaction effluent comprising water, carbon oxides, light hydrocarbon gasses, hydrogen and paraffinic hydrocarbons wherein the deoxygenating comprises at least hydrodeoxygenation; b) separating the water, carbon oxides, light hydrocarbon gasses, and hydrogen from the reaction effluent to generate a stream comprising the paraffinic hydrocarbons; c) separating the stream comprising the paraffinic hydrocarbons to generate the hydrocarbon product comprising hydrocarbons having boiling points in the aviation fuel range; an overhead stream comprising naphtha; and a bottoms stream comprising components having boiling points higher than the aviation fuel boiling point range; d) recycling a portion of the bottoms stream to the reaction zone wherein the volume ratio of recycle to feedstock is in the range of about 0.1:1 to about 8:1; and e) recovering the hydrocarbon product stream.