Process for the selective separation of morpholine

C - Chemistry – Metallurgy – 07 – D

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C07D 295/023 (2006.01) C07D 295/28 (2006.01)

Patent

CA 2202153

The invention relates to a process for the selective separation of morpholine from an aqueous solution containing morpholine, N-methyl morpholine and N- methyl morpholine-N-oxide, in which (A) a quantity of the aqueous solution is taken through a cation exchanger capable of adsorbing morpholine until said exchanger can carry substantially no more morpholine and an eluate substantially free from morpholine but containing N-methyl morpholine and N- methyl morpholine-N-oxide is obtained, and (B) the cation exchanger charged with morpholine is regenerated and re-used in step (A).

L'invention concerne un procédé pour la séparation sélective de morpholine présente dans une solution aqueuse contenant de la morpholine, de la N-méthylmorpholine et du N-oxyde de N-méthylmorpholine. Ce procédé est caractérisé en ce que (A) on fait passer une quantité de la solution aqueuse dans un échangeur cationique capable d'adsorber de la morpholine jusqu'à ce que ledit échangeur soit pratiquement saturé en morpholine et on obtient un éluat pratiquement dépourvu de morpholine mais contenant du N-méthylmorpholine et du N-oxyde de N-méthylmorpholine, et (B) l'échangeur cationique chargé de morpholine est régénéré et réutilisé lors de l'étape (A).

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