Process for preparing 1,4-diaminonaphthalene and/or 1,5-diaminoNaphthalene
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United States of America Patent
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Mar 25, 2003
Grant Date -
Dec 26, 2002
app pub date -
May 3, 2002
filing date -
May 8, 2001
priority date (Note) -
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Abstract
1,4-diaminonaphthalene and/or 1,5-diaminonaphthalene are produced by (a) reacting naphthalene with a halogen, (b) optionally, separating 1,4-dihalogen naphthalene or 1,5-dihalogen naphthalene from the mixture from step (a), and (c) reacting the mixture from step (a) or the 1,4-dihalogen naphthalene or the 1,5-dihalogen naphthalene from step (b) with ammonia and/or an organic amine in the presence of a catalyst.
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