Prodn. of aromatic amine hydrochlorides (I) comprises reacting an arylamine (II) with HCl in the presence of stirred, powdered pre-formed (I) which serves as reaction medium. The internal temp. of the reactor is pref. 10-150 degrees C and the pressure 1.05-2.0 bar.By operating with dry materials, the need to process and recycle mother liquors is avoided and corrosion problems minimised. In an example dry HCl and aniline were reacted in a bed of powdered aniline hydrochloride (Ia) to give a 99.5% yield of (Ia).
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