Liquid alkylated diphenylamine antioxidant
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United States of America Patent
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Sep 30, 1997
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N/A
app pub date -
Sep 13, 1995
filing date -
Sep 13, 1995
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Abstract
A process for monoalkylating diphenylamine using clay catalyst is disclosed which results in a reaction product having substantial amounts of desirable monoalkylated diphenylamine and minimal amounts of less desirable disubstituted diphenylamine and unsubstituted diphenylamine. The disclosed process uses clay catalysts which favor monoalkylation over dialkylation and specific conditions such as reaction temperature and mole ratios of alkylating olefin to diphenylamine.
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