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US 2022/0033718 A1Published application
Aromatic recovery complex with a hydrodearylation step to process clay tower effluents
AssigneeSaudi Arabian Oil Company
InventorsOmer Refa Koseoglu, Robert Peter Hodgkins
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Abstract
The disclosure provides a process to hydrodearylate the non-condensed alkyl-bridged multi-aromatics at the outlet of the clay tower where such multi-aromatics form rather than performing hydrodearylation on the reject stream of the aromatics complex. Hydrodearylation may feature combining a C8+ hydrocarbon stream from a clay treater with a hydrogen stream over a catalyst bed comprising a support and an acidic component optionally containing Group 8 and/or Group 6 metals.
Claims23
A process for the recovery of alkyl mono-aromatic compounds, the process comprising
- (a) directing a C8+ feed stream from a clay treater of an aromatic recovery complex into a hydrodearylation unit, wherein the stream comprises C8+ compounds of one or more heavy alkyl aromatic compounds and alkyl-bridged multi-aromatic compounds;
- (b) hydrodearylating alkyl-bridged multi-aromatic compounds in the hydrodearylation unit by adding a hydrogen stream to the C8+ feed stream over a catalyst to produce an alkyl mono-aromatic compound containing stream;
- and
- (c) directing the alkyl mono-aromatic compound containing stream produced from (b) into a xylene re-run unit to split the alkyl mono-aromatic compound containing stream into a stream comprising C8 and another stream comprising C9.
1 more element
Dependencies are inferred from the claim text.