Process for preparing diamines and polyamines from the diphenylmethane series
AssigneeBayer MaterialScience AG
InventorsFritz Pohl, Jeffrey Bolton, Richard Adamson, Heinz-Herbert Muller, Rudolf Uchdorf
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Abstract
The invention provides an improved process for preparing diamines and polyamines from the diphenylmethane series by reacting aniline and formaldehyde in the presence of an acid catalyst, the improvement involving the aniline containing less than about 3 wt. % of diamines and polyamines from the diphenylmethane series, based on the weight of the aniline.
Claims18
An improved process for the preparation of diamines and polyamines from the diphenylmethane series by reacting aniline and formaldehyde in the presence of an acid catalyst, the improvement comprising including aniline containing less than about 3 wt. % of diamines and polyamines from the diphenylmethane series, based on the weight of the aniline used.
Dependencies are inferred from the claim text.