Process for removing nitrile in etherification process

Details Process for removing nitrile in etherification process Process for removing nitrile in etherification process

C - Chemistry, Metallurgy

07

C

C07C 43/04 (2006.01) C07C 7/148 (2006.01) C07C 11/02 (2006.01) C07C 41/06 (2006.01) C07C 41/36 (2006.01)

Patent

CA 2255908

This invention provides an improved etherification process (20, 30) that reduces the amount of acidic ion-exchange resin catalyst that is deactivated by nitriles. This process uses a water phase to remove nitriles from a hydrocarbon phase followed by an alcohol phase to remove the nitriles from the water phase. A hydrogenation catalyst is used to convert the nitriles to amines so that they can be more easily removed from the alcohol phase. This invention also provides a process to remove nitriles (10, 60). This invention further provides an improved etherification process that reduces the amount of acidic ion-exchange resin catalyst that is deactivated by nitriles. These processes use a water phase to remove nitriles from a hydrocarbon phase followed by a stream, or fuel gas, phase to remove the nitriles from the water phase.

L'invention porte sur un processus amélioré d'éthérification (20, 30) réduisant la quantité de catalyseur de résine échangeuse d'ions acide désactivé par les nitrilles. Ledit processus utilise une phase aqueuse pour extraire les nitrilles de la phase hydrocarbure, puis une phase alcoolique pour extraire les nitrilles de la phase aqueuse. On utilise un catalyseur d'hydrogénation pour convertir les nitrilles en amines pour pouvoir les extraire plus facilement de la phase alcoolique. L'invention porte également sur un processus d'extraction de nitrilles (10, 60) et en outre sur un processus amélioré d'éthérification réduisant la quantité de catalyseur de résine échangeuse d'ions acide désactivé par les nitrilles et utilisant une phase aqueuse pour extraire les nitrilles de la phase hydrocarbure, puis une phase vapeur ou de gaz combustible pour extraire les nitrilles de la phase aqueuse.

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