Hydrodearylation reactor

Patent metadata

Field	Value
Publication number	US-12161987-B2
Application number	US-202117404853-A
Country	US
Kind code	B2
Filing date	Aug 17, 2021
Priority date	Oct 9, 2019
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

A system and method including providing a feed having alkyl-bridged multi-aromatic compounds to a tubular reactor, heating the tubular reactor, and cleaving an alkyl bridge of the alkyl-bridged multi-aromatic compounds.

First claim

What is claimed is:

1. A hydrodearylation reactor system comprising:
a feed conduit operationally coupled to an aromatics complex to receive a hydrocarbon feed comprising alkyl-bridged multi-aromatic compounds, the aromatics complex comprising a distillation column;
a coiled tubular reactor operationally coupled to the feed conduit to receive the hydrocarbon feed and to cleave an alkyl bridge of an alkyl-bridged multi-aromatic compound of the alkyl-bridge multi-aromatic compounds in presence of hydrogen;
a hydrogen conduit to add hydrogen to the feed conduit or directly to the coiled tubular reactor;
a furnace to heat the coiled tubular reactor;
a discharge conduit to discharge an effluent from the coiled tubular reactor; and
a heat exchanger to heat the hydrocarbon feed with the effluent.

2. The system of claim 1 , wherein the coiled tubular reactor does not comprise catalyst, wherein the coiled tubular reactor comprises a straight-run piping section and a coiled piping section, the straight-run piping section comprising an inlet portion upstream of the coiled piping section, wherein the coiled piping section comprises spirals of piping coiled around a longitudinal axis of the coiled tubular reactor, and wherein the furnace comprises a direct fired heater.

3. The system of claim 2 , wherein the straight-run piping section comprises a preheater section of the coiled tubular reactor, and wherein a length of the straight-run piping section is greater than a longitudinal length of the coiled piping section.

4. The system of claim 1 , wherein the coiled tubular reactor to discharge the effluent via the discharge conduit through the heat exchanger to a separation system and to receive hydrogen via the hydrogen conduit from the separation system, the separation system comprising a separation vessel.

5. The system of 37 , wherein the feed conduit is operationally coupled to the separation system to receive C10+ components from the separation system.

6. The system of claim 1 , comprising a second heat exchanger to cool the effluent discharged from the heat exchanger.

7. The system of claim 1 , wherein the hydrogen conduit comprises a first hydrogen conduit to add hydrogen to the feed conduit and a second hydrogen conduit to add hydrogen directly to the coiled tubular reactor.

8. A hydrodearylation reactor system comprising:
a feed conduit operationally coupled to an aromatics complex to receive hydrocarbon feed comprising aromatic compounds comprising alkyl-bridged multi-aromatic compounds from the aromatics complex, the aromatics complex comprising a distillation column;
a first coiled tubular reactor operationally coupled to the feed conduit to receive the aromatic compounds and to cleave an alkyl bridge of an alkyl-bridged multi-aromatic compound in presence of hydrogen;
a first hydrogen conduit to add hydrogen to the feed conduit or directly to the first coiled tubular reactor;
a first furnace to heat contents of the first coiled tubular reactor to a temperature in a range of 450° C. to 600° C.;
a first discharge conduit to discharge a first effluent from the first coiled tubular reactor to a second coiled tubular reactor;
the second coiled tubular reactor to perform hydrodealkylation on aromatic compounds in the second coiled tubular reactor; and
a second furnace to heat contents of the second coiled tubular reactor to a temperature of greater than 600° C.

9. The system of claim 8 , comprising a second hydrogen conduit to add hydrogen to the first discharge conduit or directly to the second coiled tubular reactor.

10. The system of claim 8 , comprising:
comprising a second discharge conduit to discharge a second effluent from the second coiled tubular reactor; and
a shell-and-tube heat exchanger to heat the hydrocarbon feed with the second effluent.

11. The system of claim 8 , wherein the first coiled tubular reactor and the second coiled tubular reactor each do not comprise catalyst, wherein the first coiled tubular reactor and the second tubular reactor each comprise a straight-run piping section and a coiled piping section, the straight-run piping section comprising an inlet portion upstream of the coiled piping section.

Assignees

• Saudi Arabian Oil Co

Inventors

• Koseoglu Omer Refa
• Hodgkins Robert Peter

Classifications

• C07C4/14

  splitting taking place at an aromatic-aliphatic bond · CPC title

• C07C4/12

  from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene · CPC title

• C07C4/16

  Thermal processes · CPC title

• C07C4/24

  by splitting polyarylsubstituted aliphatic compounds at an aliphatic-aliphatic bond, e.g. 1,4-diphenylbutane to styrene · CPC title

• C10G69/06

  including at least one step of thermal cracking in the absence of hydrogen · CPC title