Preparation of pure monoesters of adipic acid
CA 1237443 A · Owner: Basf Aktiengesellschaft · Inventors: Disteldorf, Walter; Schneider, Heinz-Walter; Kummer, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
7 - O.Z. 0050/36619, Abstract of the Disclosure: Pure monoesters of adipic acid are prepared by a process in which a) a pentenoate is reacted with carbon monoxide and hydrogen at from 90 to 140°C and under from 5 to 300 bar in the presence of a carbonyl complex of cobalt or of rhodium, and a 5-formylvalerate is separated off and, b) the 5-formylvalerate thus obtained is oxidized with molecular oxygen, or with a gas containing this at from, 20 to 100°C under from 1 to 10 bar.
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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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- 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.