Technology Type

4,4 ´-Methylenedianiline is produced by the Condensation of Formaldehyde with Aniline in the presence of an Acid Catalyst. The Reaction produces a Mixture of di-, tri-, and poly-Methyleneanilines. Aniline is removed from the Reaction Mixture by Distillation. The percentage of 4,4 ´-Methylenedianiline in the Mixtures manufactured varies from Producer to Producer. 4,4 ´-Methylenedianiline can be isolated from the Residual Mixture by Crystallization with a suitable Solvent. 4,4 ´-Methylenedianiline commercially available in bulk quantities contains approximately 96% 4,4 ´-Methylenedianiline, 3% other Isomeric Amines, and traces of Aniline.