Promoters for controlling acidity and pore size of zeolite catalysts for use in alkylation
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United States of America Patent
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Jul 29, 2008
Grant Date -
Apr 20, 2006
app pub date -
Oct 18, 2004
filing date -
Oct 18, 2004
priority date (Note) -
Expired
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Abstract
A metal-modified alkylation catalyst including a metalizeolite is provided where the metal is one or two selected from the group consisting of yttrium and a rare earth of the lanthanide series other than cerium. Where two metals are used, one may be Ce or La. The metal-promoted zeolite is useful as a molecular sieve aromatic alkylation catalyst for the production of ethylbenzene by the ethylation of benzene in the liquid phase or critical phase. An alkylation product is produced containing ethylbenzene as a primary product with the attendant production of heavier alkylated by-products of no more than 10-60 wt % of the ethylbenzene.
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