METHOD FOR THE PREPARATION DI- AND POLYAMINES OF THE DIPHENYLMETHANE SERIES FOR VARIOUS PRODUCTION CAPACITIES

The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, by condensing aniline and formaldehyde followed by an acid-catalysed rearrangement at different production capacities. By adapting the temperatures in the acid-catalysed rearrangement step, the rea...

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Bibliographic Details
Main Authors KNAUF, Thomas, GRUNER, Klaus-Gerd, WERSHOFEN, Stefan, HARTJES, Volker
Format Patent
LanguageEnglish
French
German
Published 20.01.2021
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, by condensing aniline and formaldehyde followed by an acid-catalysed rearrangement at different production capacities. By adapting the temperatures in the acid-catalysed rearrangement step, the rearrangement reaction can be fully completed despite the change in dwell time inevitably associated with changed production capacity, with no undesired changes occurring in the product composition.
Bibliography:Application Number: EP20170825817