Process for preparing alkylated p-phenylenediamines
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United States of America Patent
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May 12, 2015
Grant Date -
Mar 14, 2013
app pub date -
Sep 14, 2012
filing date -
Jul 4, 2003
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Abstract
A process for preparing alkylated p-phenylenediamine having the steps of reacting aniline and nitrobenzene in presence of a complex base catalyst to obtain 4-aminodiphenylamine intermediates, hydrogenating the 4-aminodiphenylamine intermediates to 4-aminodiphenylamine in presence of a hydrogenation catalyst, and reductively alkylating the 4-aminodiphenylamine to alkylated p-phenylenediamine.
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