Patent ID: 8557949

Claim:
A process for the production of aromatic polyamines comprising the steps of: (a) reacting aromatic amine and formaldehyde in the presence of an acid catalyst to produce a reaction mixture containing di- and polyamines; (b) neutralising the reaction mixture containing di- and polyamines; (c) separating the neutralised reaction mixture into an organic phase containing di- and polyamines and an aqueous phase; (d) treating the organic phase separated off in step (c) by (d1) washing with water or other solvent followed by (d2) separating the washed mixture into an organic phase and an aqueous phase and (d3) further fractionation of the organic phase to produce purified di- and polyamines and aromatic amine/water; and wherein the process further comprises the addition of a portion of the di- and/or polyamines obtained in step (d3) to the organic phase separated in step (c) in order to modify the density of the organic phase produced in step (d2).