Synthesis of N,N-disubstituted-p-phenylenediamine
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United States of America Patent
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Sep 10, 2002
Grant Date -
Feb 28, 2002
app pub date -
Jan 12, 2001
filing date -
Jan 12, 2000
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Abstract
An improved synthesis of N,N,-disubstituted-p-phenylene-diamine (DSPDA) preferably di-n-butyl-p-phenylenediamine is disclosed. The improvement rests on the discovery that DSPDA and its salts are extremely sensitive to oxygen so that once the product DSPDA or its salt is formed, oxygen must be excluded from all manipulations.
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