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US 10,759,723 B2Granted
Methods and systems of upgrading heavy aromatics stream to petrochemical feedstock
AssigneeSaudi Arabian Oil Company
InventorsOmer Refa Koseoglu, Robert Hodgkins
Life of this patent
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Abstract
Provided here are systems and methods that integrate a hydrodearylation process and a transalkylation process into an aromatic recovery complex. Various other embodiments may be disclosed and claimed.
Claims20
A system for conversion of alkyl-bridged non-condensed alkyl multi-aromatic compounds to alkyl mono-aromatic compounds, the system comprising:
- a first separator adapted to receive a feed stream containing one or more of heavy alkyl aromatic compounds and one or more alkyl-bridged non-condensed alkyl multi-aromatic compounds having at least two benzene rings connected by an alkyl bridge group with at least two carbons and the benzene rings being connected to different carbons of the alkyl bridge group, and produces a first product stream containing C9 and C10 compounds and a second product stream containing one or more of heavy alkyl aromatic compounds and alkyl-bridged non-condensed alkyl multi-aromatic compounds;
- a hydrodearylation reactor fluidly coupled to the first separator and adapted to receive a hydrogen stream and the second product stream and to produce a third product stream in presence of a catalyst, the third product stream containing one or more alkyl mono-aromatic compounds;
- a second separator fluidly coupled to the hydrodearylation reactor and adapted to receive the third product stream and to produce a benzene-containing stream, a toluene-containing stream, a C8-rich stream, and a bottoms C9+ stream;
- and
- a transalkylation/toluene disproportionation unit fluidly coupled to the second separator and adapted to receive the first product stream and one or more of the benzene-containing stream, the toluene-containing stream, and the bottoms C9+ stream, and to produce alkyl mono-aromatic compounds.
2 more elements
A system for conversion of alkyl-bridged non-condensed alkyl multi-aromatic compounds to alkyl mono-aromatic compounds, the system comprising:
- a first separator adapted to receive a feed stream containing one or more of heavy alkyl aromatic compounds and one or more alkyl-bridged non-condensed alkyl multi-aromatic compounds having at least two benzene rings connected by an alkyl bridge group with at least two carbons and the benzene rings being connected to different carbons of the alkyl bridge group, and produces a first product stream containing C9 and C10 compounds and a second product stream containing one or more of heavy alkyl aromatic compounds and alkyl-bridged non-condensed alkyl multi-aromatic compounds;
- a hydrodearylation reactor fluidly coupled to the first separator and adapted to receive a hydrogen stream and the second product stream and to produce a third product stream in presence of a catalyst, the third product stream containing one or more alkyl mono-aromatic compounds;
- and
- a second separator fluidly coupled to the hydrodearylation reactor and adapted to receive the third product stream and to produce a benzene-containing stream, a toluene-containing stream, a C8-rich stream, and a bottoms C9+ stream,
- wherein a catalyst bed in the hydrodearylation reactor is adapted to receive a portion of the hydrogen stream to quench the catalyst bed,
- wherein the catalyst includes an IUPAC Group 6-10 metal being at least one member of the group consisting of iron, cobalt, nickel, molybdenum, tungsten, and combinations thereof, and
- wherein an IUPAC Group 8-10 metal is 2 to 20 percent by weight of the catalyst and an IUPAC Group 6 metal is 1 to 25 percent by weight of the catalyst.
4 more elements
Dependencies are inferred from the claim text.