Method for separating pentenenitrile isomers

Details Method for separating pentenenitrile isomers Method for separating pentenenitrile isomers

C - Chemistry, Metallurgy

07

C

C07C 253/34 (2006.01) C07C 255/07 (2006.01)

Patent

CA 2423564

The invention relates to a method for separating pentenenitrile isomers having a relative volatility alpha in the region 1.0 - 1.3 in a pressure range of 1 - 500 kPa by means of separation. According to said method, the distillation is carried out in the presence of a liquid diluent which forms azeotropes with the pentenenitrile isomers in the same pressure conditions, whose relative volatility alpha is higher than the pentenenitrile isomers which are to be separated.

Procédé de séparation par distillation d'isomères de pentènenitrile qui possèdent une volatilité relative alpha de l'ordre de 1,0 à 1,3 dans la plage de pression allant de 1 à 500 kPa. Selon ledit procédé, la distillation est opérée en présence d'un diluant liquide formant avec les isomères de pentènenitrile, dans les mêmes conditions de pression, des azéotropes dont la volatilité relative alpha est plus élevée que celle des isomères de pentènenitrile à séparer.

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