申请人:Bayer Aktiengesellschaft
公开号:US04265833A1
公开(公告)日:1981-05-05
A process for the preparation of hydroxy-diphenylamines by condensation of dihydroxybenzene with an excess amount of primary aromatic amine in the presence of a catalytic amount of an acid at elevated temperature is described wherein the excess aromatic amine and, if appropriate, the reaction product is distilled off from the reaction mixture in the presence of a base.
描述了一种制备羟基二苯胺的方法,该方法通过在高温下在酸的催化下,将二羟基苯与过量的初级芳香胺缩合,其中过量的芳香胺和必要时的反应产物在碱的存在下从反应混合物中蒸馏出来。