Process for the preparation of mixtures of methylenedianiline and its higher homologous products

摘要

Process for the production of methylenedianiline and its higher homologous products which comprises reacting aniline or one of its derivatives, and formaldehyde, or one of its precursors in one or two reactors in the presence of a solid acid catalyst selected from a zeolite or a silico-alumina, distilling the reaction water or the water added with the reagents.