Purge Streams in Paraxylene Production

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United States of America Patent

APP PUB NO 20150251973A1
SERIAL NO

14425563

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Importance

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Abstract

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In a process for producing para-xylene, a hydrocarbon feed comprising xylenes and ethylbenzene is supplied to a para-xylene extraction system, where a para-xylene-rich stream is recovered from the feed to leave at least one para-xylene-depleted stream. At least a portion of the para-xylene-depleted stream is isomerized at least partially in the liquid phase to produce an isomerized stream having a higher para-xylene concentration than the para-xylene-depleted stream. At least a portion of the isomerized stream is then recycled to the para-xylene extraction system. To control ethylbenzene build-up in the process, a purge stream is removed from the para-xylene-depleted stream and/or the isomerized stream and is subjected to one or more chemical processing steps to produce benzene and/or para-xylene.

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Patent Owner(s)

Patent OwnerAddress
EXXONMOBIL CHEMICAL PATENTS INC5200 BAYWAY DRIVE BAYTOWN TX 77520

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ou, John Di-Yi Houston, US 52 500
Tinger, Robert G Friendswood, US 53 332

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