Process for producing jet fuel from isomerizing a biorenewable feed
AssigneeUop LLC
InventorsStanley Joseph Frey, Haiyan Wang, Andrea G. Bozzano
Life of this patent
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Abstract
A new catalyst hydroisomerizes C18 paraffins from fatty acids to a high degree to produce a composition with acceptable freeze point which retains 18 carbon atoms in the hydrocarbon molecule for jet fuel. We have discovered a fuel composition comprising at least 14 wt % hydrocarbon molecules having at least 18 carbon atoms and a freeze point not higher than −40° C. The composition also may exhibit a exhibiting a final boiling point of no more than 300° C. The hydroisomerization process can be once through or a portion of the product diesel stream may be selectively hydrocracked or recycled to hydroisomerization to obtain a fuel composition that meets jet fuel specifications.
Claims12
A process for hydroprocessing a biorenewable feed stream comprising:
- hydrotreating said biorenewable feed stream in the presence of hydrogen over a hydrotreating catalyst to hydrodeoxygenate said biorenewable feed stream to provide a hydrotreated stream;
- hydroisomerizing a hydroisomerization feed stream taken from said hydrotreated stream in the presence of hydrogen over a hydroisomerization catalyst to provide a hydroisomerized stream, said hydroisomerization catalyst comprising a metal component, a molecular sieve and a metal oxide binder, wherein about 40 to about 65 wt % of said metal component is dispersed on said molecular sieve and about 40 to about 65 wt % of said metal component is dispersed on said metal oxide binder;
- and
- distilling said hydroisomerized stream, optionally after separation and stripping, to produce a jet fuel stream and a diesel stream.
A process for hydroprocessing a hydroisomerization feed stream comprising:
- hydroisomerizing said hydroisomerization feed stream in the presence of hydrogen over a hydroisomerization catalyst to provide a hydroisomerized stream, said hydroisomerization catalyst comprising a metal component, a molecular sieve and a metal oxide binder wherein about 40 to about 65 wt % of said metal component is dispersed on said molecular sieve and about 40 to about 65 wt % of said metal component is dispersed on said metal oxide binder;
- separating the hydroisomerized stream into a liquid hydroisomerized stream;
- and
- distilling said liquid hydroisomerized stream to provide a jet fuel stream and a diesel stream, wherein the jet fuel stream comprises at least 14 wt % hydrocarbon molecules having at least 18 carbon atoms and a freeze point not higher than −40° C.
Dependencies are inferred from the claim text.