Catalyst selectivation
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United States of America Patent
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Sep 2, 2003
Grant Date -
N/A
app pub date -
Jun 7, 1999
filing date -
Jun 7, 1999
priority date (Note) -
Expired
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Abstract
It has been discovered that catalysts may be modified by depositing an agent derivative from an agent such as an organometallic compound upon them. Such a modification gives a catalyst useful in increased selectivity to para-substituted alkyl benzenes, such as para-xylene (PX), through reacting an aromatic compound such as toluene and/or benzene with a methylating agent from hydrogen and carbon monoxide and/or carbon dioxide and/or methanol. Using these selectivated catalysts, para-substituted alkyl benzenes can be recovered in a selectivity of 80% or greater, significantly better than the equilibrium concentration of 24%.
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