Hydrocarbon composition

Abstract

A jet boiling range composition is provided with an unexpected distribution of carbon chain lengths for the hydrocarbons and paraffins in the composition. The hydrocarbon composition corresponds to a jet boiling range composition that includes 40 wt % or more of hydrocarbons and/or paraffins that have carbon chain lengths of 17 carbons or 18 carbons. Additionally or alternately, the hydrocarbon composition can contain 45 wt % or less of C14-C17 hydrocarbons and/or paraffins. This unexpected distribution of carbon chain lengths in a jet boiling range composition can be achieved for a composition that has a freeze point of −40° C. or lower and a flash point of 38° C. or higher. Optionally, the jet boiling range composition can also have a T10 distillation point of 205° C. or less (such as down to 150° C.) and a final boiling point of 300° C. or less

What is claimed is: 
     
         1 . A jet boiling range composition, comprising 40 wt % or more of C 17 -C 18  hydrocarbons and 45 wt % or less of C 14 -C 17  hydrocarbons, the composition having a T10 distillation point of 205° C. or less, a T90 distillation point of 300° C. or less, a density of 765 kg/m 3  or more, a flash point of 38° C. or more, and a freeze point of −40° C. or less, the composition comprising 90 wt % or more of isoparaffins. 
     
     
         2 . The composition of  claim 1 , wherein the composition comprises a final boiling point of 300° C. or less. 
     
     
         3 . The composition of  claim 1 , wherein the composition comprises 50 wt % or more of C 17 -C 18  hydrocarbons. 
     
     
         4 . The composition of  claim 1 , wherein the composition comprises 45 wt % or less of C 14 -C 17  hydrocarbons. 
     
     
         5 . The composition of  claim 1 , wherein the composition comprises 5.0 wt % or less of C 19+  hydrocarbons. 
     
     
         6 . The composition of  claim 1 , wherein the composition comprises 1.0 wppm or less of oxygen, or wherein the composition comprises 10 wppm or less of sulfur, or a combination thereof. 
     
     
         7 . The composition of  claim 1 , wherein the composition comprises a renewable jet boiling range composition. 
     
     
         8 . A method for producing a renewable jet boiling range fraction, comprising:
 contacting a bio-derived feedstock with a hydrotreatment catalyst under effective hydrotreatment conditions to produce a deoxygenated effluent comprising a deoxygenated liquid fraction, the bio-derived feedstock comprising 70 wt % or more of C 17+  carbon chains;   contacting at least a portion of the deoxygenated liquid fraction with a dewaxing catalyst comprising ZSM-48 and Pt, Pd, or a combination thereof under effective dewaxing conditions comprising to produce an isomerized effluent, the effective dewaxing conditions comprising a weighted average bed temperature of 300° C. to 350° C., a pressure of 1.4 MPa-g to 14 MPa-g, and a LHSV of 1.0 hr −1  to 8.0 hr −1  relative to a volume of dewaxing catalyst; and   separating the isomerized effluent to form a jet boiling range fraction and one or more lower boiling fractions, the jet boiling range fraction comprising a T90 distillation point of 300° C. or less, a freeze point of −40° C. or less, and a flash point of 38° C. or more.   
     
     
         9 . The method of  claim 8 , wherein a yield of the jet boiling range fraction is 70 wt % or more relative to a weight of the at least a portion of the deoxygenated liquid fraction. 
     
     
         10 . The method of  claim 8 , wherein the jet boiling range fraction comprises 1.0 wppm or less of oxygen, or wherein the jet boiling range fraction comprises 10 wppm or less of sulfur, or a combination thereof. 
     
     
         11 . The method of  claim 8 , wherein the jet boiling range fraction comprises a final boiling point of 300° C. or less. 
     
     
         12 . The method of  claim 8 , wherein the jet boiling range fraction comprises 50 wt % or more of C 17 -C 18  hydrocarbons. 
     
     
         13 . The method of  claim 8 , wherein the bio-derived feedstock comprises 5.0 wt % or less of C 19+  carbon chains. 
     
     
         14 . The method of  claim 8 , wherein the at least a portion of the deoxygenated effluent comprises 80 wt % or more of C 17+  n-paraffins. 
     
     
         15 . The method of  claim 8 , wherein the jet boiling range fraction comprises less than 45 wt % of C 14 -C 17  hydrocarbons. 
     
     
         16 . The method of  claim 8 , wherein the effective dewaxing conditions comprise a severity index of 3 to 9. 
     
     
         17 . The method of  claim 8 , wherein contacting the bio-derived feedstock with a hydrotreatment catalyst further comprises contacting at least a portion of the deoxygenated effluent with the hydrotreatment catalyst. 
     
     
         18 . The method of  claim 8 , wherein separating the isomerized effluent further comprises forming a diesel boiling range fraction, and wherein contacting at least a portion of the deoxygenated liquid fraction with a dewaxing catalyst comprises contacting at least a portion of the diesel boiling range fraction with the catalyst. 
     
     
         19 . The method of  claim 8 , further comprising separating the deoxygenated liquid fraction from the deoxygenated effluent. 
     
     
         20 . The method of  claim 8 , wherein the dewaxing catalyst comprises 0.1 wt % to 2.0 wt % of Pt, Pd, or a combination thereof, relative to a weight of the dewaxing catalyst.