Methods and devices for removing acetic acid from...

Details Methods and devices for removing acetic acid from... Methods and devices for removing acetic acid from...

C - Chemistry, Metallurgy

07

C

C07C 51/42 (2006.01) C07C 51/31 (2006.01)

Patent

CA 2304363

This invention relates to methods and devices for removing acetic acid from cyclohexane in the direct oxidation of cyclohexane to adipic acid, especially after recycling catalyst which is precipitaded by introduction of additional cyclohexane. The removal of acetic acid is preferably conducted by use of rather small amounts of wash-water in one to three stage extractors. A two stage reactor is preferable as being more efficient.

L'invention concerne des procédés et des dispositifs permettant d'éliminer l'acide acétique dans le cyclohexane au cours de l'oxydation directe du cyclohexane en acide adipique, particulièrement après le recyclage de catalyseur précipité par adjonction de cyclohexane supplémentaire. De préférence, on conduit cette élimination d'acide acétique en utilisant des quantités relativement faibles d'eau de lavage dans des extracteurs de un à trois étages. L'utilisation d'un réacteur à deux étages est préférable pour gagner en efficacité.

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