Process for preparing 4-aminodiphenylamine intermediates
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United States of America Patent
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Jun 24, 2003
Grant Date -
May 8, 2003
app pub date -
May 10, 2002
filing date -
Jul 23, 2001
priority date (Note) -
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Abstract
The invention is directed-to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact and reacting the aniline and nitrobenzene in a confined zone at a suitable time and temperature, in the presence of a mixture comprising an inorganic salt or metal organic salt having a cation that would be a suitable cation of a strong inorganic base, an oxidant and an organic base, the mixture not including a reaction product of betaine and a strong inorganic base.
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