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.

1,4-diaminonaphthalene y/o 1,5-diaminonaphthalene son producidos (a) reaccionando la naftalina con un halógeno, (b) opcionalmente, separando la naftalina 1,4-dihalogen o la naftalina 1,5-dihalogen de la mezcla del paso (a), y (c) reaccionando la mezcla del paso (a) o la naftalina 1,4-dihalogen o la naftalina 1,5-dihalogen del paso (b) con amoníaco y/o una amina orgánica en la presencia de un catalizador.