Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs
Reexamination Certificate
2007-12-11
2007-12-11
Wood, Elizabeth D. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
C502S064000, C502S066000, C502S071000, C502S077000, C502S208000, C502S214000, C502S322000, C502S327000
Reexamination Certificate
active
11550823
ABSTRACT:
A transalkylation process for reacting carbon number nine aromatics with toluene to form carbon number eight aromatics such as para-xylene is herein disclosed. The process is based on the discovery that deactivating contaminants present in typical hydrocarbon feeds, such as chlorides, can be removed with an alumina guard bed prior to contacting with a transalkylation catalyst. Effective transalkylation catalysts have a solid-acid component such as mordenite, and a metal component such as rhenium. The invention is embodied in a process, a catalyst system, and an apparatus. The invention provides for longer catalyst cycle life when processing aromatics under commercial transalkylation conditions.
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Boldingh Edwin P.
Negiz Antoine
Pischek Sergio A.
Maas Maryann
UOP LLC
Wood Elizabeth D.
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