Process for converting oxygenates to distillate fuels
AssigneeUop LLC
InventorsEseoghene Jeroro, Manuela Serban
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Abstract
A process is provided to produce increased amounts of cycloparaffin compounds in a methanol to jet fuel process by modifying the olefin oligomerization step that after hydrogenation provides the increased quantities of cycloparaffins for jet fuel. A two-stage oligomerization process is employed in which an acidic catalyst such as a zeolite is in one reactor and a metal, such as nickel, on alumina catalyst is in a second reactor. The two stages may be in either order in the process. A small amount of aromatic compounds may be added to the feed to achieve the desired level of cycloparaffins in the product. Adjustments to other aspects of the process may also help to provide a product with higher cycloparaffin content.
Claims20
A process for increased production of cycloparaffins, said process comprising contacting a feed stream with a catalyst to produce an olefin stream, oligomerizing said olefin stream in a two-stage oligomerization process under conditions to produce an effluent containing an increased amount of cycloolefins and then hydrogenating said effluent to produce a product stream containing an increased amount of cycloparaffin compounds,
- wherein the feed stream comprises methanol, dimethyl ether, ethanol or combinations thereof and the catalyst comprises silicoaluminate, modified silicoaluminate, alumina, or modified alumina.
A process for increased production of cycloparaffins, said process comprising contacting a ethanol stream with a dehydration catalyst comprising alumina, modified alumina, or an alkali modified ZSM-5 to produce an olefin stream, oligomerizing said olefin stream in a two-stage oligomerization process under conditions to produce an effluent containing an increased amount of cycloolefins and then hydrogenating said effluent to produce a product stream containing an increased amount of cycloparaffin compounds.
A process for increased production of cycloparaffins, said process comprising contacting a feed stream comprising methanol, dimethyl ether, ethanol or combinations thereof with a catalyst comprising an alkali modified ZSM-5, beta zeolite, or Y-zeolite to produce an olefin stream, oligomerizing said olefin stream in a two-stage oligomerization process under conditions to produce an effluent containing an increased amount of cycloolefins and then hydrogenating said effluent to produce a product stream containing an increased amount of cycloparaffin compounds.
Dependencies are inferred from the claim text.