Process for ethyl acetate production

Details Process for ethyl acetate production Process for ethyl acetate production

C - Chemistry, Metallurgy

07

C

C07C 67/40 (2006.01) C07C 69/14 (2006.01)

Patent

CA 2270899

Oxidation of liquid ethanol in the presence of excess liquid ethanol and a supported oxidation catalyst provides a one step process for production of ethyl acetate. The acetic acid produced in the oxidation is absorbed by the excess liquid ethanol, which esterifies to ethyl acetate. Ethyl acetate and water is removed from the process for separation of the ethyl acetate. The oxidation portion of process is preferred with a metallic oxidation catalyst on a hydrophobic support and the esterification portion with an acidic solid ion exchange resin to promote the esterification. The process can be performed in series in separate steps, or preferably, in parallel in a single vessel, preferably a trickle bed reactor. The process is easily controlled and enables the use of a wide range of ethanol concentration as feed material.

L'oxydation d'éthanol liquide en présence d'éthanol liquide excédentaire et d'un catalyseur d'oxydation sur support constitue la phase unique d'un procédé de production d'acétate d'éthyle. L'acide acétique produit lors de l'oxydation est absorbé par l'éthanol liquide excédentaire qui l'estérifie en acétate d'éthyle. L'étape d'oxydation du procédé s'effectue, de préférence, en présence d'un catalyseur métallique d'oxydation sur support hydrophobe et l'étape d'estérification, à l'aide d'une résine échangeuse d'ions acide solide, ceci afin de faciliter ladite estérification. Ce procédé peut être mis en oeuvre en série par étapes distinctes, ou, de préférence, en parallèle dans une seule cuve. Ce procédé, qui se maîtrise facilement, autorise l'emploi d'un large éventail de concentrations d'éthanol comme substance de base

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