Patent ID: 7999142
Filing Date: 2011-08-16
Classification: C10G,C10L,Y02E,Y02P

Abstract:
1. A process for producing a branched-paraffin-rich diesel boiling range hydrocarbon product from a renewable feedstock comprising: a) treating the feedstock in a first reaction zone by hydrogenating and deoxygenating the feedstock using a catalyst at reaction conditions in the presence of hydrogen to provide a first reaction zone product stream comprising hydrogen, carbon dioxide, and a hydrocarbon fraction comprising n-paraffins in the diesel boiling range; and b) selectively separating, in a hot high pressure hydrogen stripper, a gaseous stream comprising at least a portion of the hydrogen, water, and carbon oxides from the first reaction zone product stream and introducing a remainder stream comprising at least the n-paraffins to a second reaction zone to contact an isomerization catalyst at isomerization conditions to isomerize at least a portion of the n-paraffins and generate a branched paraffin-rich stream; c) wherein the first and second reaction zones are operated at conditions including a temperature of about 40° C. to about 400° C. and a pressure of about 689 kPa absolute (100 psia) to about 13,790 kPa absolute (2000 psia); d) wherein the hot high pressure hydrogen stripper is operated at a temperature of about 40° C. to about 300° C. and a pressure of about 689 kPa absolute (100 psia) to about 13,790 kPa absolute (2000 psia); and e) wherein the hot high pressure hydrogen stripper is operated at a pressure that is within 1034 kPa absolute (150 psia) that of the first reaction zone.