Process for the distillative purification of toluenediamine

The invention relates to a process for distillative purification of TDA from a TDA, high boilers and low boilers contained reactant stream in a dividing wall column in which a dividing wall in the column longitudinal direction form an upper combined column region (2), a lower common column region (3), a feed section ( 4) is arranged with reinforcing part (5) and stripping section (6) and a withdrawal section (7) having a rectifying section (9) and stripping section (8). The method comprises the steps of: A) feeding the reactant stream (13) in the feed section (4) of the dividing wall column (1); B) drawing off a low boiler fraction via the top of the column (11); C) drawing off TDA via a side draw (14) in the withdrawal section (7) of the dividing wall column (1); D) withdrawing a high boiler fraction via the bottom of the column (12).