Single stage renewable jet production
AssigneeExxonMobil Technology and Engineering Company
InventorsXiaochun Xu, Alexander J. Dulin, Madelyn M. Evans, Richard C. Baliban
Life of this patent
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Abstract
Systems and methods are provided for production of renewable jet fuel and/or jet fuel blending component fractions using a single stage reaction system. Although only a single separation stage is used, the systems and methods can reduce or minimize the volume of feedstock that is exposed to hydrocracking conditions while still producing a jet boiling range fraction having beneficial cold flow properties.
Claims19
A method for producing a renewable jet boiling range fraction, comprising:
- contacting a bio-derived feedstock and a hydrocracked, dewaxed co-feed with a hydrotreatment catalyst under effective hydrotreatment conditions to produce a deoxygenated effluent comprising a deoxygenated liquid fraction;
- separating the deoxygenated liquid fraction to form at least i) a jet boiling range fraction having a T90 distillation point of 230° C. or lower and a freeze point of −40° C. or lower and ii) a second fraction having a final boiling point of 300° C. or higher;
- contacting at least a portion of the second fraction with a hydrocracking catalyst under hydrocracking conditions to produce a hydrocracked effluent;
- and cascading at least a portion of the hydrocracked effluent into a reactor containing a dewaxing catalyst under dewaxing conditions to produce an effluent comprising a portion of the hydrocracked, dewaxed co-feed.
A method for producing a renewable jet boiling range fraction, comprising:
- contacting a bio-derived feedstock and a hydrocracked, dewaxed co-feed with a hydrotreatment catalyst under effective hydrotreatment conditions to produce a deoxygenated effluent comprising a deoxygenated liquid fraction;
- separating, in a separation stage, the deoxygenated liquid fraction to form at least i) a jet boiling range fraction having a T90 distillation point of 230° C. or lower and a freeze point of −40° C. or lower and ii) a second fraction having a final boiling point of 300° C. or higher;
- contacting at least a portion of the second fraction with a hydrocracking catalyst under hydrocracking conditions to produce a hydrocracked effluent;
- and cascading at least a portion of the hydrocracked effluent into a reactor containing a dewaxing catalyst under dewaxing conditions to produce an effluent comprising a portion of the hydrocracked, dewaxed co-feed, wherein the separation stage is the is the only separation stage used to produce the renewable jet boiling range fuel from the bio-derived feedstock.
A method for producing a renewable jet boiling range fraction, comprising:
- contacting a bio-derived feedstock and a hydrocracked, dewaxed co-feed with a hydrotreatment catalyst under effective hydrotreatment conditions to produce a deoxygenated effluent comprising a deoxygenated liquid fraction;
- separating the deoxygenated liquid fraction to form at least i) a jet boiling range fraction having a T90 distillation point of 230° C. or lower and a freeze point of −40° C. or lower and ii) a second fraction having a final boiling point of 300° C. or higher;
- contacting at least a portion of the second fraction with a hydrocracking catalyst under hydrocracking conditions to produce a hydrocracked effluent;
- and cascading at least a portion of the hydrocracked effluent into a reactor containing a dewaxing catalyst under dewaxing conditions to produce an effluent comprising a portion of the hydrocracked, dewaxed co-feed, wherein the hydrocracking catalyst comprises a noble hydrogenation metal.
Dependencies are inferred from the claim text.