Processes and systems for petrochemical production integrating deep hydrogenation of hydrotreated diesel
AssigneeSaudi Arabian Oil Company
InventorOmer Refa Koseoglu
Life of this patent
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Abstract
Process scheme configurations are disclosed that enable deep hydrogenation of middle distillates. The hydrogenated middle distillates are processed in a steam cracker for conversion into light olefins. Feeds to the deep hydrogenation zone include diesel range streams from a diesel hydrotreating zone, a gas oil hydroprocessing zone, and/or a vacuum residue hydrocracking zone. The deep hydrogenation zone operates under conditions effective to reduce aromatic content in a diesel range feedstream from a range of about 10-40 wt % or greater, to a hydrogenated distillate range intermediate product having an aromatic content of less than about 5-0.5 wt %.
Claims17
A process for petrochemical production comprising:
- subjecting crude oil to atmospheric distillation to produce at least middle distillates;
- subjecting the middle distillates from atmospheric distillation to hydrotreating to produce at least middle distillates having a reduced concentration of organosulfur and organonitrogen compounds;
- subjecting all or a portion of middle distillates produced by hydrotreating to hydrogenation to hydrogenate aromatics contained in the middle distillates and produce hydrogenated middle distillates, wherein hydrogenation occurs in the presence of an effective quantity of a hydrogenation catalyst containing one or more active metal components selected from Pt, Pd, Re and a combination comprising at least two of Pt, Pd or Re, and the hydrogenation catalyst including a catalyst support comprising non-acidic amorphous alumina and about 0.1-15 wt % of a modified USY zeolite having one or more of Ti, Zr and/or Hf substituting aluminum atoms constituting the zeolite framework thereof;
- and
- subjecting all or a portion of the hydrogenated middle distillates to thermal cracking in a steam cracking complex to obtain light olefins.
A system for petrochemical production comprising:
- an atmospheric distillation unit operable to separate at least middle distillates from a crude oil feedstock;
- a hydrotreating zone operable to produce at least hydrotreated middle distillates from all or a portion of the middle distillates, wherein the hydrotreated middle distillates have a reduced concentration of organosulfur and organonitrogen compounds relative to the middle distillates;
- a fixed-bed hydrogenation zone operable to produce hydrogenated middle distillates from all or a portion of the hydrotreated middle distillates, the hydrogenation zone containing an effective quantity of a hydrogenation catalyst, the hydrogenation catalyst
- containing one or more active metal components selected from Pt, Pd, Re and a combination comprising at least two of Pt, Pd or Re, and
- including a catalyst support comprising non-acidic amorphous alumina and about 0.1-15 wt % of a modified USY zeolite having one or more of Ti, Zr and/or Hf substituting aluminum atoms constituting the zeolite framework thereof;
- and
- a steam cracking complex operable to thermally crack all or a portion of the hydrogenated middle distillates for production of light olefins.
Dependencies are inferred from the claim text.