Patent ID: 8058492

Claim:
A process for controlling the production of a diesel component comprising hydrocarbons having boiling points in the diesel fuel range and an aviation component comprising hydrocarbons having boiling points in the aviation fuel range from a renewable feedstock comprising: identifying specifications required for the diesel component and for the aviation component; determining yields required for the diesel component and for the aviation component and that meet required specifications; determining isomerization and selective hydrocracking conditions required in an isomerization and selective hydrocracking zone that result in the predetermined yields required for the diesel component and for the aviation component wherein the diesel component and the aviation component further meet the identified specifications; determining operating conditions for a fractionation zone that results in the separation of the diesel component and the aviation component at the required yields; hydrogenating and deoxygenating the renewable feedstock by contacting the feedstock in a hydrogenation and deoxygenation zone with a hydrogenation and deoxygenation catalyst at hydrogenation and deoxygenation conditions to provide a hydrogenation and deoxygenation zone effluent comprising n-paraffins; isomerizing and selectively hydrocracking at least a portion of the n-paraffins in the hydrogenation and deoxygenation zone effluent by contacting , in the presence of hydrogen, with an isomerization and selective hydrocracking catalyst at the predetermined isomerization conditions in an isomerization and selective hydrocracking zone to generate branched-paraffins in an isomerization and selective hydrocracking zone effluent; and fractionating, in the fractionation zone, the isomerization and selective hydrocracking zone effluent the predetermined operating conditions of the fractionation zone to provide a first product stream comprising the diesel component, and a second product stream comprising the aviation component.