Preparation of diamino diaryl methane

To provide a preparation of diamino diaryl methane. The present invention is, a) the presence of a homogeneous acid catalyst, the step of reacting an aromatic amine and methylene donors, b) removing the homogeneous acid catalyst from the reaction product, and c) post-processing and purifying, has, Removing the homogeneous acid catalyst from the reaction product, a method for producing a diamino diaryl methane is carried out by adsorption with a solid adsorbent. .BACKGROUND