Process for the preparation of 1,3- propanediol by the hydrogenation of hydroxypropionaldehyde
CA 2079655 A1 · Owner: Arntz, Dietrich · Inventors: Schaefer-Sindlinger, Adolf; Arntz, Dietrich; Haas, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of 1,3-propanediol by the hydrogenation of hydroxypropionaldehyde (HPA) in aqueous solution on a formed carrier catalyst in a solid bed the, concentration of the HPA in the solution being from 5 to 100% by weight and hydrogenation being carried out at temperatures of from 30 to 180°C and hydrogen pressures of from 5 to 300 bar and at a pH of from 2.5 to 6.5, characterised in that the carrier catalyst consists of titanium oxide on which platinum is applied in a finely divided form in a quantity of from 0.1 to 5.0% by weight, based on the carrier.
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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 October 1, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 2014.
- 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
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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.