Process for producing diesel fuel and aviation fuel from renewable feedstocks having improving yields

A process for producing both a diesel range product and an aviation range product from a renewable feedstock comprising:

• hydrogenating and deoxygenating the renewable feedstock by contacting the renewable feedstock and hydrogen with a hydrogenation and deoxygenation catalyst in a hydrogenation and deoxygenation zone at hydrogenating and deoxygenating conditions to provide a hydrogenation and deoxygenation zone effluent comprising paraffins, hydrogen, water, and carbon oxides;
• separating at least the paraffins from the hydrogenation and deoxygenation zone effluent;
• separating the paraffins into at least a diesel boiling range fraction and an aviation boiling range fraction in a first fractionation zone;
• storing the diesel boiling range fraction in an intermediate diesel storage tank and storing the aviation boiling range fraction in an intermediate aviation storage tank;
• isomerizing and selectively hydrocracking the diesel boiling range fraction and the aviation boiling range fraction by alternately:
• contacting the diesel boiling range fraction from the intermediate diesel storage tank with an isomerization and selective hydrocracking catalyst in the presence of hydrogen in an isomerization and selective hydrocracking zone at first isomerization and selective hydrocracking conditions for the diesel boiling range fraction and generating a first effluent comprising at least first normal and branched paraffins in the diesel boiling point range, first normal and branched paraffins in the aviation boiling point range, first unreacted hydrogen, first naphtha, and first LPG;
• separating the diesel range effluent into a first gaseous component and a first liquid component wherein the first liquid component comprises the first normal and branched paraffins in the diesel boiling point range, the first normal and branched paraffins in the aviation boiling point range, the first naphtha, and the first LPG;
• and
• separating the first liquid component into at least a diesel product comprising the first normal and branched paraffins in the diesel boiling point range, a first aviation product comprising the first normal and branched paraffins in the aviation boiling point range, a first naphtha product comprising the first naphtha, and a first LPG product comprising the first LPG in a second fractionation zone;
• or:
• contacting the aviation boiling range fraction from the intermediate aviation storage tank with the isomerization and selective hydrocracking catalyst in the presence of hydrogen in the isomerization and selective hydrocracking zone at second isomerization and selective hydrocracking conditions for the aviation boiling range fraction and generating a second effluent comprising at least second normal and branched paraffins in the aviation boiling point range, second hydrogen, second naphtha, and second LPG;
• separating the aviation range effluent into a second gaseous component and a second liquid component wherein the second liquid component comprises the second normal and branched paraffins in the aviation boiling point range, the second naphtha, and the second LPG;
• and
• separating the second liquid component into at least a second aviation product comprising the second normal and branched paraffins in the aviation boiling point range, a second naphtha product comprising the second naphtha, and a second LPG product comprising the second LPG in the second fractionation zone.