Method for reducing the content of an unsaturated amine in a...

Details Method for reducing the content of an unsaturated amine in a... Method for reducing the content of an unsaturated amine in a...

C - Chemistry, Metallurgy

07

C

C07C 253/34 (2006.01) C07C 209/84 (2006.01)

Patent

CA 2430063

The invention relates to a method for reducing the content of an aliphatic, monounsaturated amine (III) in a mixture (IV) containing an aminonitrile (I) or a diamine (II), or mixtures thereof and an amine (III). Said method is characterised in that a) mixture (IV) is reacted with an anionic nucleophile (V) in a quantity ranging between 0.01 and 10 mol per mol of amine (III) in mixture (IV) to obtain a mixture (VI). The invention is also characterised in that b) aminonitrile (I) or diamine (II) or mixtures thereof are removed by distillation from mixture (VI), at a temperature ranging between 50 and 170 ~C and a pressure of between 0.5 and 100 kPa.

L'invention concerne un procédé de réduction de la teneur en une amine aliphatique monoinsaturée (III) d'un mélange (IV) contenant un aminonitrile (I) ou une diamine (II) ou un mélange de ceux-ci, et une amine (III). Ledit procédé est caractérisé (a) en ce qu'on transforme le mélange (IV) avec un nucléophile (V) dans une quantité de 0,01 à 10 mol par mol d'amine (III) dans le mélange (IV) de manière à obtenir un mélange (VI). Ledit procédé est par ailleurs caractérisé (b) en ce qu'on élimine par distillation aminonitrile (I) ou diamine (II) ou leurs mélanges dans le mélange (VI) à une température de 50 à 170 ·C et une pression de 0,5 à 100 kPa.

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