FIELD: chemistry.
SUBSTANCE: invention relates to an improved method of removing acetaldehyde from acetic acid system, involving: (i) preparing a solution containing methyl iodide and acetaldehyde from the acetic acid system; and (ii) bringing the solution into contact with ion-exchange resin, where the solution contacting with ion-exchange resin converts at least part of acetaldehyde to extract oligomer and wherein the oligomer contains crotonaldehyde.
EFFECT: invention also relates to a method of acetic acid production system operation, to a method of producing acetic acid and acetic acid production system.
15 cl, 11 dwg, 9 ex
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