Recovery of hexamethylenediame (hmd) with low...

Details Recovery of hexamethylenediame (hmd) with low... Recovery of hexamethylenediame (hmd) with low...

C - Chemistry, Metallurgy

07

C

C07C 209/86 (2006.01) C07C 211/12 (2006.01)

Patent

CA 2422990

A method for separating a mixture of hexamethylenediamine, aminocapronitile and polarographically reducible impurities using fractional distillation in which the temperature in the rectifying zone of a distillation column varies sigmoidally along its length to force a major portion of the PRI to co-distill with the aminocapronitrile.

Cette invention a trait à un procédé permettant de séparer de l'hexaméthylènediamine, de l'aminocapronitrile et des impuretés réductibles de manière polarographique et ce, par le moyen d'une distillation fractionnée dans laquelle la température de la zone de rectification d'une colonne de distillation varie de façon sigmoïde sur la longueur de celle-ci afin de forcer une majeure partie des PRI à se co-distiller avec l'aminocapronitrile.

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