Process for preparing diaminodiphenylmethanes

Details Process for preparing diaminodiphenylmethanes Process for preparing diaminodiphenylmethanes

C - Chemistry, Metallurgy

07

C

C07C 209/78 (2006.01)

Patent

CA 2630801

Process for preparing diamino diphenyl methane and poly-(diamino diphenyl methane) comprising reacting aniline with formaldehyde in the presence of hydrogen chloride added in the gaseous form wherein the aniline contains 0.1 to 7 wt%, prefer-ably 2 to 5 wt% of a protic chemical, preferably water.

La présente invention a pour objet un procédé de synthèse de diaminodiphénylméthane et de poly-(diaminodiphénylméthane) qui comprend la réaction de l'aniline avec du formaldéhyde en présence de chlorure d'hydrogène ajouté sous forme gazeuse, l'aniline contenant entre 0,1 et 7 % en poids, préférentiellement entre 2 et 5 % en poids d'une substance chimique protique, préférentiellement de l'eau.

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