A process for the production of 3-hydroxyalkanals
CA 2083864 C · Owner: Haas, Thomas · Inventors: Arntz, Dietrich; Haas, Thomas; Brand, Reinhold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the production of 3-hydroxyalkanals, more particularly 3-hydroxypropionaldehyde, by hydration of the corresponding 2-alkenals more, particularly acrolein, in the presence of a(olilcatalyst containing acidic functional groups. The use of catalysts based on an inorganic support containing basic activity centers, which are at least partly occupied by a polybasic acid, of which the first pK s value is between 0 and 3 in a, form in which it cannot be removed by water enables the, hydration to be carried out with high selectivity. At the same time, the disadvantages of known organic fixed-bed catalysts are avoided. Preferred catalysts are based on titanium …
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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, 1992 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 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
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.