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Huntsman – Pertraction of MDA

Last updated 958 days ago by Albert Verver


NL GUTS Group of Users of Technology for Separation in the Netherlands


20110419 Huntsman – Ramon Scheffer – Pertraction of MDA

The production of polyurethanes requires the making of MDI, that is produced from MDA, a product from the reaction of aniline and formalin, catalysed by HCl. One waste stream is water containing salts, MDA and aniline. Conventional recovery of MDA and aniline involves several consecutive and parallel steps. With pertraction direct removal of MDA is possible by extracting MDA through a membrane to aniline. The mixture goes back to the reactor section and water to wwtp directly.

The development program consisted of membrane selection, module selection, batch tests and continuous test connected to full scale production. All principles and operability were proven, sponsored by Agentschap NL. Next phase is demo. Partners are sought. www.huntsman.com


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