Process for preparing saturated alcohols
CA 2254847 A1 · Owner: Celanese Gmbh · Inventors: Springer, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present process for preparing saturated alcohols comprises an aldol condensation of alkyl methyl ketones which have 6-8 carbon atoms and are branched at the .beta.-carbon atom with aldehydes which have 4-15 carbon atoms and are branched at the .alpha.-carbon atom to form .alpha. .beta.-unsaturated ketones and subsequent hydrogenation of the .alpha. .beta.-unsaturated ketones to give alcohols wherein, the aldol condensation is carried out at a temperature of 60-130°C in the presence of a 30-55% strength aqueous solution of an alkali metal hydroxide. The process displays very low by-product formation.
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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
- Filed November 26, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2020.
- 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.