Purification of acetic acid with ozone

Details Purification of acetic acid with ozone Purification of acetic acid with ozone

C - Chemistry, Metallurgy

07

C

260/529.6, 260/5

C07C 51/12 (2006.01) C07C 51/42 (2006.01) C07C 51/487 (2006.01) C07C 53/08 (2006.01)

Patent

CA 1313676

71529-46 ABSTRACT The present invention is directed to the purification of acetic acid and the improvement of permanganate time by subjecting the acid to treatment with ozone or an ozone containing gas in the presence or absence of an oxidation catalyst. Thus acetic acid, such as formed and recovered from the catalytic carbonylation of methanol, can be purified of minute amounts of unsaturates, iodides, and carbonyl compounds by treatment with ozone which reacts with such impurities. The ozone-derived impurities may he subsequently separated from the acetic acid, if desired, by conventional distillation or adsorption on activated carbon, molecular sieves or an ion- exchange resin.

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