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US 2021/0130709 A1Published application
Integrated methods and systems of hydrodearylation and hydrodealkylation of heavy aromatics to produce benzene, toluene, and xylenes
AssigneeSaudi Arabian Oil Company
InventorsOmer Refa Koseoglu, Robert Peter Hodgkins
Life of this patent
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Abstract
Provided here are systems and methods that integrate a hydrodearylation process and a hydrodealkylation process into an aromatic recovery complex. Various other embodiments may be disclosed and claimed.
Claims53
A process for production of benzene, toluene, and xylenes, the process comprising the steps of:
- supplying a hydrogen stream and a feed stream containing one or more of heavy alkyl aromatic compounds and alkyl-bridged non-condensed alkyl multi-aromatic compounds from an aromatic complex to a hydrodearylation reactor to react in the presence of a catalyst under specific reaction conditions to yield a hydrodearylated stream containing hydrogen, C1 to C4 gases, benzene, toluene, xylenes, and C9+ compounds;
- supplying the hydrodearylated stream to a first separation unit to produce a bottom separated stream containing C9+ compounds and a top separated stream containing hydrogen, C1 to C4 gases, benzene, toluene, and xylenes;
- supplying a hydrogen stream and the bottom separated stream containing C9+ compounds to a hydrodealkylation reactor to produce a hydrodealkylated stream containing H2, C1 to C4 gases, benzene, toluene, xylenes, and C9+ compounds;
- and
- supplying the hydrodealkylated stream to a second separation unit to produce a bottom product stream containing unconverted C9+ compounds and a top product stream containing hydrogen, C1 to C4 gases, benzene, toluene, and xylenes.
2 more elements
A system for production of benzene, toluene, and xylenes, the system comprising:
- a hydrodearylation reactor adapted to receive a hydrogen stream and a feed stream containing one or more of heavy alkyl aromatic compounds and alkyl-bridged non-condensed alkyl multi-aromatic compounds and to produce a hydrodearylated stream in presence of a catalyst, and the hydrodearylated stream containing one or more alkyl mono-aromatic compounds;
- a first separator fluidly coupled to the hydrodearylation reactor and adapted to receive the hydrodearylated stream and to produce a bottom separated stream containing C9+ compounds and a top separated stream containing hydrogen, C1 to C4 gases, benzene, toluene, and xylenes;
- and
- a hydrodealkylation reactor that is adapted to receive the bottom separated stream containing the C9+ compounds and to produce a hydrodealkylated stream containing C1 to C4 gases, benzene, toluene, xylenes, and C9+ compounds;
- and
- a second separator fluidly coupled to the hydrodealkylation reactor and adapted to receive the hydrodealkylated stream and to produce a bottom product stream containing unconverted C9+ compounds and a top product stream containing hydrogen, C1 to C4 gases, benzene, toluene, and xylenes.
3 more elements
A process for production of benzene, toluene, and xylenes, the process comprising the steps of:
- supplying a hydrogen stream and a feed stream containing one or more of heavy alkyl aromatic compounds and alkyl-bridged non-condensed alkyl multi-aromatic compounds from an aromatic complex to a hydrodealkylation reactor to react under specific reaction conditions to yield a hydrodealkylated stream containing hydrogen, C1 to C4 gases, benzene, toluene, xylenes, and C9+ compounds;
- and
- supplying the hydrodealkylated stream to a separation unit to produce a bottom product stream containing unconverted C9+ compounds and a top product stream containing hydrogen, C1 to C4 gases, benzene, toluene, and xylenes.
A system for production of benzene, toluene, and xylenes, the system comprising:
- a hydrodealkylation reactor adapted to receive a hydrogen stream and a feed stream containing one or more of heavy alkyl aromatic compounds and alkyl-bridged non-condensed alkyl multi-aromatic compounds and to produce a hydrodealkylated stream, and the hydrodealkylated stream containing C1 to C4 gases, benzene, toluene, xylenes, and C9+ compounds;
- and
- a separator fluidly coupled to the hydrodealkylation reactor and adapted to receive the hydrodealkylated stream and to produce a bottom product stream containing unconverted C9+ compounds and a top product stream containing hydrogen, C1 to C4 gases, benzene, toluene, and xylenes.
A process for production of benzene, toluene, and xylenes, the process comprising the steps of:
- supplying a hydrogen stream and a feed stream containing one or more of heavy alkyl aromatic compounds and alkyl-bridged non-condensed alkyl multi-aromatic compounds from an aromatic complex to a hydrodearylation reactor to react in the presence of a catalyst under specific reaction conditions to yield a hydrodearylated stream containing hydrogen, C1 to C4 gases, benzene, toluene, xylenes, and C9+ compounds;
- supplying the hydrodearylated stream containing C9+ compounds to a hydrodealkylation reactor to produce a hydrodealkylated stream containing H2, C1 to C4 gases, benzene, toluene, xylenes, and C9+ compounds;
- and
- supplying the hydrodealkylated stream to a separation unit to produce a bottom product stream containing unconverted C9+ compounds and a top product stream containing hydrogen, C1 to C4 gases, benzene, toluene, and xylenes.
1 more element
A system for production of benzene, toluene, and xylenes, the system comprising:
- a hydrodearylation reactor adapted to receive a hydrogen stream and a feed stream containing one or more of heavy alkyl aromatic compounds and alkyl-bridged non-condensed alkyl multi-aromatic compounds and to produce a hydrodearylated stream in presence of a catalyst, and the hydrodearylated stream containing one or more alkyl mono-aromatic compounds;
- a hydrodealkylation reactor that is adapted to receive the hydrodearylated stream and to produce a hydrodealkylated stream containing C1 to C4 gases, benzene, toluene, xylenes, and C9+ compounds;
- and
- a separator fluidly coupled to the hydrodealkylation reactor and adapted to receive the hydrodealkylated stream and to produce a bottom product stream containing unconverted C9+ compounds and a top product stream containing hydrogen, C1 to C4 gases, benzene, toluene, and xylenes.
1 more element
Dependencies are inferred from the claim text.