Purification of acetic acid with ozone
CA 1313676 C · Owner: Hoechst Celanese Corporation · Inventors: Gibbs, Russell K. Jr.; Scates, Mark Owen; Torrence, G. Paull
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 ionexchange resin.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.