PRODUCTION METHOD FOR 4,4'-BIS(ALKYLAMINO) DIPHENYLAMINE
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United States of America Patent
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Issued Date -
Aug 2, 2012
app pub date -
Sep 30, 2010
filing date -
Oct 15, 2009
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a production method for 4,4′-bis(alkylamino)diphenylamine, and more specifically relates to a method in which 4,4′-dinitrodiphenylamine (4,4′-DNDPA) is produced by reacting urea with nitrobenzene in the presence of a polar organic solvent and a base catalyst, and then the 4,4′-bis(alkylamino)diphenylamine (4,4′-BAADA) is produced by subjecting the 4,4′-DNDPA and a ketone to hydrogenation in the presence of a hydrogenation catalyst.
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