Single stage renewable jet production

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.

What is claimed is: 
     
         1 . A method for producing a renewable jet boiling range fraction, comprising: contacting a bio-derived feedstock and a hydrocracked co-feed with a hydrotreatment catalyst under effective hydrotreatment conditions to produce a deoxygenated effluent comprising a deoxygenated liquid fraction; cascading at least a portion of the deoxygenated liquid fraction into a reactor containing a dewaxing catalyst under dewaxing conditions to produce a dewaxed effluent; separating the dewaxed effluent to form at least i) a jet boiling range fraction having a T90 distillation point of 260° 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; and contacting at least a portion of the second fraction with a hydrocracking catalyst under hydrocracking conditions to produce a hydrocracked effluent comprising the hydrocracked co-feed. 
     
     
         2 . The method of  claim 1 , wherein the deoxygenated effluent comprises 0.5 wt % or more of H 2 O. 
     
     
         3 . The method of  claim 1 , wherein the jet boiling range fraction comprises a flash point of 38° C. or higher. 
     
     
         4 . The method of  claim 1 , wherein the jet boiling range fraction comprises 1.0 wppm or less of oxygen. 
     
     
         5 . The method of  claim 1 , wherein a yield of the jet boiling range fraction is 35 wt % or more relative to a weight of the bio-derived feedstock. 
     
     
         6 . The method of  claim 1 , wherein the dewaxing catalyst comprises a binder having a binder surface area of 100 m 2 /g or less, or wherein the dewaxing catalyst comprises a non-noble hydrogenation metal, or a combination thereof. 
     
     
         7 . The method of  claim 1 , wherein the hydrocracking catalyst comprises a zeotype framework structure having a largest pore channel comprising a 12-member ring and wherein the dewaxing catalyst comprises a zeotype framework structure having a largest pore channel comprising a 10-member ring. 
     
     
         8 . The method of  claim 1 , wherein the jet boiling range fraction comprises 5.0 wt % or more of n-paraffins, relative to a weight of the jet boiling range fraction. 
     
     
         9 . The method of  claim 1 , wherein separating the dewaxed effluent further comprises forming a recycle fraction containing hydrogen, and wherein contacting the bio-derived feedstock and the hydrocracked co-feed with a hydrotreatment catalyst under effective hydrotreatment conditions contacting the bio-derived feedstock and the hydrocracked co-feed in the presence of at least a portion of the recycle fraction. 
     
     
         10 . A system for producing a renewable jet boiling range fraction, comprising: a hydrotreatment reactor comprising at least one hydrotreatment feed inlet, at least one treat gas inlet, and a deoxygenated effluent outlet, the hydrotreatment reactor comprising one or more beds of hydrotreating catalyst; a dewaxing reactor comprising a dewaxing feed inlet in fluid communication with the hydrodeoxygenated effluent outlet without intermediate separation, a dewaxed effluent outlet, and one or more beds of dewaxing catalyst; a separation stage comprising a separation inlet in fluid communication with the dewaxed effluent outlet, a gas product outlet, and a plurality of liquid product outlets, the plurality of liquid product outlets comprising at least a jet boiling range fraction outlet; and a hydrocracking reactor comprising a hydrocracking feed inlet, a hydrocracked effluent outlet in fluid communication with the at least one hydrotreatment feed inlet, and one or more beds of hydrocracking catalyst, the hydrocracking feed inlet being in fluid communication with one or more outlets of the plurality of liquid product outlets that are different from the jet boiling range fraction outlet. 
     
     
         11 . The system of  claim 10 , wherein the hydrocracking catalyst comprises a zeotype framework structure having a largest pore channel comprising a 12-member ring and wherein the dewaxing catalyst comprises a zeotype framework structure having a largest pore channel comprising a 10-member ring. 
     
     
         12 . The system of  claim 10 , wherein the hydrocracking reactor further comprises a hydrocracking treat gas inlet in fluid communication with the gas product outlet. 
     
     
         13 . The system of  claim 10 , wherein the dewaxing catalyst comprises a binder having a binder surface area of 100 m 2 /g or less, or wherein the dewaxing catalyst comprises a non-noble hydrogenation metal, or a combination thereof. 
     
     
         14 . A method for producing a renewable jet boiling range fraction, comprising: contacting a bio-derived feedstock and a hydrocracked co-feed with a hydrotreatment catalyst under effective hydrotreatment conditions to produce a deoxygenated effluent comprising a deoxygenated liquid fraction, wherein the deoxygenated effluent comprises 0.5 wt % or more of H 2 O; cascading at least a portion of the deoxygenated liquid fraction into a reactor containing a dewaxing catalyst under dewaxing conditions to produce a dewaxed effluent; separating the dewaxed effluent to form at least i) a jet boiling range fraction having a T90 distillation point of 260° C. or lower and a freeze point of −40° C. or lower, wherein a yield of the jet boiling range fraction is 35 wt % or more relative to a weight of the bio-derived feedstock, and ii) a second fraction having a final boiling point of 300° C. or higher; and contacting at least a portion of the second fraction with a hydrocracking catalyst under hydrocracking conditions to produce a hydrocracked effluent comprising the hydrocracked co-feed. 
     
     
         15 . The method of  claim 14 , wherein the jet boiling range fraction comprises a flash point of 38° C. or higher. 
     
     
         16 . The method of  claim 14 , wherein the jet boiling range fraction comprises 1.0 wppm or less of oxygen. 
     
     
         17 . The method of  claim 14 , wherein the dewaxing catalyst comprises a binder having a binder surface area of 100 m 2 /g or less, or wherein the dewaxing catalyst comprises a non-noble hydrogenation metal, or a combination thereof. 
     
     
         18 . The method of  claim 14 , wherein the hydrocracking catalyst comprises a zeotype framework structure having a largest pore channel comprising a 12-member ring and wherein the dewaxing catalyst comprises a zeotype framework structure having a largest pore channel comprising a 10-member ring. 
     
     
         19 . The method of  claim 14 , wherein the jet boiling range fraction comprises 5.0 wt % or more of n-paraffins, relative to a weight of the jet boiling range fraction. 
     
     
         20 . The method of  claim 14 , wherein separating the dewaxed effluent further comprises forming a recycle fraction containing hydrogen, and wherein contacting the bio-derived feedstock and the hydrocracked co-feed with a hydrotreatment catalyst under effective hydrotreatment conditions contacting the bio-derived feedstock and the hydrocracked co-feed in the presence of at least a portion of the recycle fraction.