Method for the preparation of alkylenecarbonates
CA 1076590 A · Owner: Anic S.P.A. · Inventors: Cipriani, Gioacchino; Neri, Carlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the preparation of alkylene carbonates having alkyl, aryl, cycloalkyl and aralkyl substituents the corresponding alkylene oxides are reacted with carbon dioxide, the catalyst being a combination of a protic substance having the formula ROH, wherein R is either hydrogen or a radical as enumerated above with a nitro-, geneous basic substance selected from the group constituted by dimethylaniline, triethylamine, pyridine and a basic nitrogeneous resin which is insoluble in the reaction medium. The minor component (by weight) of catalyst being present in the range from 0.1% to 30% by weight of the alkylene oxide. The reaction is carried out at temperatures ranging from 0°C to 200°C and under …
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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 April 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 1997.
- 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.