Purification process

Details Purification process Purification process

C - Chemistry, Metallurgy

07

C

C07C 69/14 (2006.01) C07C 67/04 (2006.01) C07C 67/54 (2006.01)

Patent

CA 2270136

This invention is a process for the removal of acetaldehyde impurities from ethyl acetate formed by reacting acetic acid with ethylene over a catalyst by refining a crude mixture of ethyl acetate, diethyl ether, acetaldehye and water in a column (C) so as to remove (a) refined ethyl acetate as a base product to be further purified, and (b) light ends mixture comprising diethyl ether and acetaldehyde overhead to be fed to an aldehyde removal column; a purge comprising acetaldehyde is removed at or near the top of the aldehyde removal column The process is a very important step in the commercial manufacture of ethyl acetate because the presence of acetaldehyde is detrimental to the esterification catalyst

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