Technology Unit

: 2nd Reactor
: DOW PMDA
Short Name: 2nd Reactor
Description: The Second (or Intermediate) Reaction Zone represents a cooled Zone comprising a Separate Tank, Vessel, Piping or the like to which the Mixture from the First Reactor is conveyed. The Conversion of Aminals to Aminobenzylamines in this Zone is maximized along with some final unavoidable rearrangement of Aminobenzylamines to Polymeric MDA Product. It is at this stage of the Reaction sequence that the minor proportion of the Aniline free mixture of Di(aminophenyl)methanes and Oligomeric Polymethylene Polyphenyl Polyamines Isolated in the Aniline Stripping Zone is added by a Transfer Line leading directly into the Zone.
Link: https://patents.google.com/patent/US4792624A/en