Ester production by hydrogenation of carboxylic acids and anhydrides
CA 2004753 A1 · Owner: Pimblett, Gillian · Inventors: Price, Peter J.; Mclachlan, Kenneth A.; Pimblett, Gillian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A carboxylic acid ester is produced at a selectivity of greater than 50% whilst producing the corresponding alcohol at a selectivity less than 10% from a carboxylic acid or anhydride thereof by reacting the acid or anhydride with hydrogen at elevated temperature in the presence as catalyst of a composition comprising a component (i) comprising at least one of Group VIII noble metal and/or a component (ii) comprising at least one of molybdenum tungsten and, rhenium and a component (iii) comprising an oxide of a Group IVb element. The process is particularly applicable to the hydrogenation of acetic acid to ethyl acetate.
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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 December 6, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2011.
- 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.