Method of upgrading residua
AssigneeUnion Oil Company of California
InventorEmiliano de la Fuente
Life of this patent
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Abstract
Residua comprises upgraded by first partitioning a hydrocracked residua into a vapor fraction and a liquid fraction. The vapor fraction is hydrotreated forming a first hydrotreated product. The liquid fraction is partitioned into a residua fraction and a light liquid fraction. The light liquid fraction can be hydrotreated or hydrocracked to form a hydroprocessed product. The hydrotreated product and the hydroprocessed product are then combined forming a substantially upgraded synthetic crude product refinable as a routine crude in a refinery into products that meet stringent specifications. In particular, residua can be upgraded to make a quality jet fuel fraction and a naphtha fraction containing less than 1 ppmw sulfur and nitrogen.
Claims27
A method for upgrading a hydrocracked residua comprising:
- separating a hydrocracked residua into a first fraction and a second fraction containing between 25 and 50 wt.% aromatic components;
- catalytically hydrotreating the first fraction to produce a hydrotreated product;
- distilling the second fraction under vacuum, at a pressure comprising between about 1.67 KPa and 10.02 KPa (0.5 and 6 inches of Hg) to produce a third fraction and at a residua fraction;
- catalytically hydroprocessing the third fraction to produce a hydroprocessed product;
- and
- combining said hydrotreated product with said hydroprocessed product producing a fuel product containing no more than 25 vol.% aromatic components.
A method for upgrading a hydrocracked residua comprising:
- separating a hydrocracked residua into a first fraction containing no more than 20 vol.% aromatic components and a second fraction containing at least 50 vol.% aromatic components;
- catalytically hydrotreating the first fraction to produce a hydrotreated product;
- distilling the second fraction under vacuum, to produce a third fraction containing between 25 and 50 wt.% aromatic components and a residua fraction;
- catalytically hydroprocessing the third fraction in the presence of a cracking catalyst for the production of midbarrel products boiling between 150.degree. C. and 355.degree. C. (302.degree. F. and 671.degree. F.) to produce a hydroprocessed product;
- and
- combining said hydrotreated product with said hydroprocessed product to produce a product of which is distillable into a fuel product boiling between 175.degree. C. and 260.degree. C. (347.degree. F. and 500.degree. F.), the fuel product containing no more than 20 vol.% aroamtic components and b) a naphtha fraction containing no more than 1 ppmw sulfur-containing components and 1 ppmw nitrogen containing components.
Dependencies are inferred from the claim text.