Regeneration of spent supported metal catalysts
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United States of America Patent
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Jun 21, 2005
Grant Date -
Nov 20, 2003
app pub date -
Dec 20, 2002
filing date -
Dec 22, 2000
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Abstract
A method for regenerating spent supported metal catalysts comprising treating the spent catalyst with an organo-metallic complex forming agent having an ionization constant pK1 of at least 2.5. The catalyst activity is restored to an activity level near to or greater than the fresh catalyst. The regeneration method is particularly useful for regenerating spent palladium catalysts on an alumina support as utilized for the hydrogenation of ethyl anthraquinone (EAQ) in the production of hydrogen peroxide.
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