2-pyrrolidone production
CA 1114387 A · Owner: Chevron Research And Technology Company · Inventors: Sweeney, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for production of 2-pyrrolidone which comprises (a) contacting succinonitrile with water at a temperature between 150 and 300°C and a pressure between 50 and 10,000 psig to thereby hydrolyze succinonitile and (b) contacting the hydrolyzed succinonitrile with hydrogen in the presence of a heterogeneous hydrogenation catalyst and at a temperature between 200 and 300°C and a pressure between 100 and 10,000 psig to thereby obtain 2pyrrolidone.
Read the whole patent
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 December 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1998.
- 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.