PLURAL STAGE TOLUENE DISPROPORTIONATION PROCESS MINIMIZING ETHYLBENZENE
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United States of America Patent
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Issued Date -
Dec 13, 2001
app pub date -
Aug 3, 1999
filing date -
Aug 3, 1999
priority date (Note) -
Abandoned
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Abstract
A process for toluene disproportionation which obtains high xylene yields while minimizing ethylbenzene production employs a dual catalyst bed. The first bed employs an acid zeolite, e.g., ZSM-5 which disproportionates toluene and the downstream second bed uses an acid zeolite having hydrogenation-dehydrogenation activity, e.g., PtZSM-5, to selectively eliminate ethylbenzene.
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