Process for preparing aminonaphthalene derivatives in a titanium or titanium alloy reactor
AssigneeBayer Aktiengesellschaft
InventorsGeorg Spielberger, Hermann Wunderlich, Gunther Klag, Marko Zlokarnik
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Abstract
Aminonaphthalene derivatives are prepared by reacting the corresponding naphthol derivative with ammonia or amines in the presence of bisulfites. The reaction is carried out in a continuous procedure in reaction apparatus which consists wholly or partly of titanium or a titanium alloy, carbon largely excluded. Suitable alloys are titanium/palladium, titanium/nickel or titanium/molybdenum.
Claims9
In a process for preparing aminonaphthalene derivatives wherein the corresponding naphthol derivative is reacted with ammonia or amines in the presence of bisulfites, the improvement which comprises carrying out the reaction in a continuous procedure in reaction apparatus which consists wholly or partly of titanium or a titanium alloy, wherein the elementary carbon content in the system used is less than 0.1% by weight.
Dependencies are inferred from the claim text.